JP2022094149A - Austenitic stainless steel and corrosion-resistant member - Google Patents

Abstract

To provide an inexpensive austenitic stainless steel which has corrosion resistance equivalent to SUS316L and is excellent in workability and manufacturability.SOLUTION: There is provided an austenitic stainless steel which comprises, by mass, 0.010 to 0.100% of C, 2.0% or less of Si, 3.0% or less of Mn, 0.035% or less of P, 0.030% or less of S, 6.0 to 14.0% of Ni, 16.0% or more and less than 20.0% of Cr, 3.0% or less of Mo, 0.05 to 3.0% of Cu, 0.20% or less of Al, 0.100 to 0.250% of N and the balance comprising Fe and inevitable impurities, wherein A value represented by the following expression (1) is -2 to 5.5. A=3(Cr+Mo)+4.5Si-2.8Ni-1.4(Mn+Cu)-84(C+N)-19.8 (1) [Cr, Mo, Si, Ni, Mn, Cu, C and N represent the content (mass%) of each element.]SELECTED DRAWING: None

Description

The present invention relates to austenitic stainless steel and corrosion resistant members.

SUS316L, which is a kind of austenitic stainless steel, has good corrosion resistance in corrosive environments such as seawater and salt water, and also has excellent workability and manufacturability, so that it can be used for various purposes such as household products, building materials, and automobile parts. Used in.
However, since SUS316L contains expensive Ni and Mo, there is a drawback that the product price rises. Therefore, there is a demand for an inexpensive austenitic stainless steel having the same level of corrosion resistance as SUS316L and having excellent workability and manufacturability.

As an austenitic stainless steel with improved corrosion resistance while suppressing the use of expensive elements such as Mo as much as possible, Patent Document 1 states that Fe and Cr nitrides are contained in the γ phase in order from the surface to the inner layer. An austenitic stainless steel having three layers of a surface layer, an S phase in which N is solid-dissolved in an oversaturation of 10% by mass or more, and a carbon-enriched layer on the surface has been proposed.

Japanese Unexamined Patent Publication No. 2016-188417

However, the austenitic stainless steel described in Patent Document 1 requires a complicated surface treatment in order to form a predetermined layer on the surface, so that the production efficiency is low and the cost is extra for performing the surface treatment. There is a problem of this.

The present invention has been made to solve the above problems, and is an inexpensive austenitic stainless steel having the same level of corrosion resistance as SUS316L and excellent in workability and manufacturability, and this austenitic stainless steel. It is an object of the present invention to provide a corrosion resistant member using.

The present inventors have conducted intensive studies on the composition of austenitic stainless steel based on the composition of SUS316L. In order to improve the manufacturability of austenitic stainless steel, it is desirable to increase the content of the δ ferrite phase (hereinafter referred to as “δ phase”), which has a high solid solubility of P and S in the solidified state, but the δ phase When the content of the austenitic phase is large, cracks are likely to occur due to the difference in strength from the austenitic phase (hereinafter referred to as “γ phase”). Therefore, it is necessary to control the content of the δ phase in an appropriate range, but if the content of expensive Ni is reduced, the content of the δ phase increases. Therefore, in order to secure the balance between the δ phase and the γ phase, it is necessary to add a γ-producing element (Mn, Cu, N, etc.). However, if the content of Mn or Cu is increased, the corrosion resistance is lowered, and if the content of N is increased, the hardness is increased and the workability is lowered. In view of these points, the present inventors have found that the above problems can be solved by optimizing the composition of the austenitic stainless steel and setting it to a specific composition, and complete the present invention. It came to.

That is, in the present invention, C: 0.010 to 0.100%, Si: 2.0% or less, Mn: 3.0% or less, P: 0.035% or less, S: 0.030 on a mass basis. % Or less, Ni: 6.0 to 14.0%, Cr: 16.0% or more and less than 20.0%, Mo: 3.0% or less, Cu: 0.05 to 3.0%, Al: 0. An austenitic stainless steel containing 20% or less, N: 0.100 to 0.250%, the balance consisting of Fe and impurities, and an A value of -2 to 5.5 represented by the following formula (1). be.
A = 3 (Cr + Mo) +4.5Si-2.8Ni-1.4 (Mn + Cu) -84 (C + N) -19.8 (1)
In the formula, Cr, Mo, Si, Ni, Mn, Cu, C and N represent the content (mass%) of each element.

Further, the present invention is a corrosion resistant member containing the above-mentioned austenitic stainless steel.

According to the present invention, it is possible to provide an inexpensive austenitic stainless steel having the same level of corrosion resistance as SUS316L and excellent in workability and manufacturability, and a corrosion resistant member using this austenitic stainless steel.

Hereinafter, embodiments of the present invention will be specifically described. The present invention is not limited to the following embodiments, and changes, improvements, etc. have been appropriately added to the following embodiments based on the ordinary knowledge of those skilled in the art, without departing from the spirit of the present invention. It should be understood that things also fall within the scope of the present invention.
In addition, in this specification, "%" notation about a component means "mass%" unless otherwise specified.

The austenite-based stainless steel according to the embodiment of the present invention has C: 0.010 to 0.100%, Si: 2.0% or less, Mn: 3.0% or less, P: 0.035% or less, S: 0.030% or less, Ni: 6.0 to 14.0%, Cr: 16.0% or more and less than 20.0%, Mo: 3.0% or less, Cu: 0.05 to 3.0%, Al : 0.20% or less, N: 0.100 to 0.250%, and the balance consists of Fe and impurities.
Here, the term "impurity" as used herein refers to a component mixed with raw materials such as ore and scrap and various factors in the manufacturing process when austenitic stainless steel is industrially manufactured, and is described in the present invention. It means something that is acceptable as long as it does not have an adverse effect.

Further, the austenitic stainless steel according to the embodiment of the present invention can further contain B: 0.001 to 0.004%.
Further, the austenitic stainless steel according to the embodiment of the present invention has Ca: 0.0001% to 0.10%, Mg: 0.0001% to 0.10%, REM: 0.0001% to 0.10%. It can further include one or more selected from.
Further, the austenite-based stainless steel according to the embodiment of the present invention has Ti: 0.001% to 1.0%, Nb: 0.001% to 1.0%, V: 0.001% to 1.0%. , Zr: 0.001% to 1.0%, W: 0.001 to 1.0%, Co: 0.001 to 1.0%, Hf: 0.001 to 1.0%, Ta: 0. It can further contain one or more selected from 001 to 1.0% and Sn: 0.001 to 0.10%.
Hereinafter, each component will be described in detail.

<C: 0.010 to 0.100%>
If the C content is too high, the corrosion resistance of the austenitic stainless steel will decrease. Therefore, the upper limit of the C content is controlled to 0.100%, preferably 0.095%, and more preferably 0.090%. On the other hand, if the content of C is too small, the refining cost will increase. Therefore, the lower limit of the C content is controlled to 0.010%, preferably 0.015%, and more preferably 0.020%.
In addition, in this specification, "corrosion resistance" means corrosion resistance in a corrosive environment containing NaCl such as seawater and salt water.

<Si: 2.0% or less>
If the Si content is too high, the workability of the austenitic stainless steel will deteriorate. Therefore, the upper limit of the Si content is controlled to 2.0%, preferably 1.98%, and more preferably 1.95%. On the other hand, the lower limit of the Si content is not particularly limited, but is preferably 0.01%, more preferably 0.05%, and even more preferably 0.1%.

<Mn: 3.0% or less>
Mn is an element that produces an austenite phase (γ phase). If the Mn content is too high, the corrosion resistance of the austenitic stainless steel will decrease. Therefore, the upper limit of the Mn content is controlled to 3.0%, preferably 2.5%, and more preferably 2.0%. On the other hand, the lower limit of the Mn content is not particularly limited, but is preferably 0.01%, more preferably 0.05%, and even more preferably 0.1%.

<P: 0.035% or less>
If the P content is too high, the workability of the austenitic stainless steel will deteriorate. Therefore, the upper limit of the P content is controlled to 0.035%, preferably 0.034%, and more preferably 0.033%. On the other hand, the lower limit of the P content is not particularly limited, but is preferably 0.001%, more preferably 0.005%, and even more preferably 0.010%.

<S: 0.030% or less>
If the S content is too high, the manufacturability of austenitic stainless steel will deteriorate. Therefore, the upper limit of the S content is controlled to 0.030%, preferably 0.025%, and more preferably 0.020%. On the other hand, the lower limit of the S content is not particularly limited, but is preferably 0.0001%, more preferably 0.0003%, and even more preferably 0.0005%.

<Ni: 6.0 to 14.0%>
Like Mn, Ni is an element that produces an austenite phase (γ phase). Since Ni is expensive, if the content is too high, the manufacturing cost will increase. Therefore, the upper limit of the Ni content is controlled to 14.0%, preferably 13.8%, and more preferably 13.5%. On the other hand, if the Ni content is too low, the workability of the austenitic stainless steel deteriorates. Therefore, the lower limit of the Ni content is controlled to 6.0%, preferably 6.05%.

<Cr: 16.0% or more and less than 20.0%>
If the Cr content is too high, the formation of an intermetallic compound (σ phase) is promoted, so that the workability of the austenitic stainless steel is deteriorated. Therefore, the Cr content is controlled to be less than 20.0%, preferably 19.8% or less. On the other hand, if the Cr content is too small, sufficient corrosion resistance cannot be obtained. Therefore, the lower limit of the Cr content is controlled to 16.0%, preferably 16.2%.

<Mo: 3.0% or less>
Since Mo is expensive, if the content of Mo is too high, the manufacturing cost will increase. Therefore, the upper limit of the Mo content is controlled to 3.0%, preferably 2.0%, and more preferably 1.0%. On the other hand, the lower limit of the Mo content is not particularly limited, but is preferably 0.001%, more preferably 0.002%, and even more preferably 0.003%.

<Cu: 0.05-3.0%>
If the Cu content is too high, the corrosion resistance of the austenitic stainless steel will deteriorate. Therefore, the upper limit of the Cu content is controlled to 3.0%, preferably 2.0%, and more preferably 1.0%. On the other hand, if the Cu content is too low, the workability of the austenitic stainless steel will deteriorate. Therefore, the lower limit of Cu is controlled to 0.05%, preferably 0.10%, and more preferably 0.15%.

<Al: 0.20% or less>
If the Al content is too high, the amount of inclusions produced increases and the quality deteriorates. Therefore, the upper limit of the Al content is controlled to 0.20%, preferably 0.10%, and more preferably 0.05%. On the other hand, the lower limit of the Al content is not particularly limited, but is preferably 0.0001%, more preferably 0.0002%, and even more preferably 0.0003%.

<N: 0.100 to 0.250%>
If the N content is too high, the workability of the austenitic stainless steel will deteriorate. Therefore, the upper limit of the N content is controlled to 0.250%, preferably 0.230%, and more preferably 0.220%. On the other hand, if the content of N is too small, the corrosion resistance of the austenitic stainless steel cannot be sufficiently obtained. Therefore, the lower limit of the N content is controlled to 0.100%, preferably 0.110%.

<B: 0.001 to 0.004%>
If the content of B is too large, the corrosion resistance of the austenitic stainless steel will decrease. Therefore, the upper limit of the B content is controlled to 0.004%, preferably 0.003%. On the other hand, if the content of B is too small, the manufacturability of the austenitic stainless steel is lowered. Therefore, the lower limit of the B content is controlled to 0.001%, preferably 0.002%.

<Ca: 0.0001% to 0.10%>
Ca is an element added as needed to improve hot workability. From the viewpoint of obtaining the effect of Ca, the lower limit of the Ca content is controlled to 0.0001%, preferably 0.0005%, and more preferably 0.001%. In addition, if the Ca content is too high, the amount of inclusions produced increases and the quality deteriorates. Therefore, the upper limit of the Ca content is controlled to 0.10%, preferably 0.05%, and more preferably 0.01%.

<Mg: 0.0001% to 0.10%>
Mg is an element added as needed to improve hot workability. From the viewpoint of obtaining the effect of Mg, the lower limit of the Mg content is controlled to 0.0001%, preferably 0.0005%, and more preferably 0.001%. Further, if the content of Mg is too large, the amount of inclusions produced increases and the quality deteriorates. Therefore, the upper limit of the Mg content is controlled to 0.10%, preferably 0.05%, and more preferably 0.01%.

<REM: 0.0001% to 0.10%>
REM is an element added as needed to improve hot workability. From the viewpoint of obtaining the effect of REM, the lower limit of the content of REM is controlled to 0.0001%, preferably 0.0005%, and more preferably 0.001%. Further, since REM is expensive, if the content of REM is too large, the manufacturing cost will increase. Therefore, the upper limit of the REM content is controlled to 0.10%, preferably 0.05%, and more preferably 0.01%.

<Ti: 0.001% to 1.0%>
Ti is an element added as needed to fix C in steel and improve intergranular corrosion resistance. From the viewpoint of obtaining the effect of Ti, the lower limit of the Ti content is controlled to 0.001%, preferably 0.005%, and more preferably 0.010%. Further, if the Ti content is too high, the workability of the austenitic stainless steel is deteriorated. Therefore, the upper limit of the Ti content is controlled to 1.0%, preferably 0.8%, and more preferably 0.5%.

<Nb: 0.001% to 1.0%>
Nb is an element added as needed to fix C in steel and improve intergranular corrosion resistance. From the viewpoint of obtaining the effect of Nb, the lower limit of the content of Nb is controlled to 0.001%, preferably 0.005%, and more preferably 0.010%. Further, if the content of Nb is too large, the workability of the austenitic stainless steel is lowered. Therefore, the upper limit of the Nb content is controlled to 1.0%, preferably 0.8%, and more preferably 0.5%.

<V: 0.001% to 1.0%>
V is an element added as needed to fix C in steel and improve intergranular corrosion resistance. From the viewpoint of obtaining the effect of V, the lower limit of the content of V is controlled to 0.001%, preferably 0.005%, and more preferably 0.010%. Further, if the content of V is too large, the workability of the austenitic stainless steel is deteriorated. Therefore, the upper limit of the V content is controlled to 1.0%, preferably 0.8%, and more preferably 0.5%.

<Zr: 0.001% to 1.0%>
Zr is an element added as needed to fix C in steel and improve intergranular corrosion resistance. From the viewpoint of obtaining the effect of Zr, the lower limit of the Zr content is controlled to 0.001%, preferably 0.005%, and more preferably 0.010%. Further, if the content of Zr is too large, the workability of the austenitic stainless steel is deteriorated. Therefore, the upper limit of the Zr content is controlled to 1.0%, preferably 0.8%, and more preferably 0.5%.

<W: 0.001 to 1.0%>
W is an element added as needed to improve high temperature strength and corrosion resistance. From the viewpoint of obtaining the effect of W, the lower limit of the content of W is controlled to 0.001%, preferably 0.005%, and more preferably 0.010%. Further, if the W content is too large, the workability of the austenitic stainless steel is lowered and the manufacturing cost is increased. Therefore, the upper limit of the W content is controlled to 1.0%, preferably 0.8%, and more preferably 0.5%.

<Co: 0.001 to 1.0%>
Co is an element added as needed to improve corrosion resistance. From the viewpoint of obtaining the effect of Co, the lower limit of the Co content is controlled to 0.001%, preferably 0.005%, and more preferably 0.010%. Further, if the Co content is too large, the workability of the austenitic stainless steel is lowered and the manufacturing cost is increased. Therefore, the upper limit of the Co content is controlled to 1.0%, preferably 0.8%, and more preferably 0.5%.

<Hf: 0.001 to 1.0%>
Hf is an element added as needed to fix C in steel and improve intergranular corrosion resistance. From the viewpoint of obtaining the effect of Hf, the lower limit of the Hf content is controlled to 0.001%, preferably 0.005%, and more preferably 0.010%. Further, if the content of Hf is too large, the workability of the austenitic stainless steel is deteriorated. Therefore, the upper limit of the Hf content is controlled to 1.0%, preferably 0.8%, and more preferably 0.5%.

<Ta: 0.001 to 1.0%>
Ta is an element added as needed to fix C in steel and improve intergranular corrosion resistance. From the viewpoint of obtaining the effect of Ta, the lower limit of the Ta content is controlled to 0.001%, preferably 0.005%, and more preferably 0.010%. Further, if the Ta content is too large, the workability of the austenitic stainless steel is deteriorated. Therefore, the upper limit of the Ta content is controlled to 1.0%, preferably 0.8%, and more preferably 0.5%.

<Sn: 0.001 to 0.10%>
Sn is an element added as needed to improve corrosion resistance. From the viewpoint of obtaining the effect of Sn, the lower limit of the Sn content is controlled to 0.001%, preferably 0.005%, and more preferably 0.010%. Further, if the Sn content is too large, the manufacturability of the austenitic stainless steel is lowered. Therefore, the upper limit of the Sn content is controlled to 0.10%, preferably 0.05%, and more preferably 0.01%.

The austenitic stainless steel according to the embodiment of the present invention has an A value represented by the following formula (1) of -2 to 5.5, preferably -1.8 to 5.3, and more preferably -1.7. ~ 5.0.
A = 3 (Cr + Mo) +4.5Si-2.8Ni-1.4 (Mn + Cu) -84 (C + N) -19.8 (1)
In the formula, Cr, Mo, Si, Ni, Mn, Cu, C and N represent the content (mass%) of each element.
By controlling the A value within the above range, it is possible to achieve both manufacturability and workability of austenitic stainless steel. In particular, by setting the A value to -2 or more, the oxidation of the grain boundaries can be suppressed, so that the oxidation scale is less likely to remain. Further, by setting the A value to 5.5 or less, it is possible to suppress ear breakage during the production of austenitic stainless steel and to secure the elongation that can be processed into various shapes during the processing of the austenitic stainless steel.

The shape of the austenitic stainless steel according to the embodiment of the present invention is not particularly limited as long as it has the above-mentioned characteristics. For example, the austenitic stainless steel can be various plate materials such as a hot-rolled plate, a hot-rolled annealed plate, a cold-rolled plate, and a cold-rolled annealed plate, but a cold-rolled annealed plate is preferable from the viewpoint of manufacturability. ..

The austenitic stainless steel according to the embodiment of the present invention can be produced by using a method known in the art except for melting the stainless steel having the above composition. Specifically, when the austenitic stainless steel is a cold-rolled annealed plate, it can be manufactured as follows. First, a stainless steel having the above composition is melted, forged or cast, and then hot-rolled to obtain a hot-rolled plate. Next, the hot-rolled plate is appropriately annealed, pickled, and cold-rolled to obtain a cold-rolled plate. Next, the cold-rolled plate is appropriately annealed and pickled to obtain a cold-rolled annealed plate.
The conditions in each step may be appropriately adjusted according to the composition of the stainless steel, and are not particularly limited.

The austenitic stainless steel according to the embodiment of the present invention having the above characteristics has good manufacturability and workability, and also has corrosion resistance in a corrosive environment containing NaCl such as seawater and salt water at the same level as SUS316L. , Can be used as a material for corrosion resistant members used in the corrosive environment. Further, this austenitic stainless steel is suitable for application to various members in which SUS316L is used because the manufacturing cost can be suppressed by reducing the content of expensive elements such as Mo and Ni. ..

Hereinafter, the contents of the present invention will be described in detail with reference to examples, but the present invention is not limited to these.

30 kg of stainless steel having the composition shown in Table 1 is melted by vacuum melting, forged into a plate with a thickness of 30 mm, heated at 1230 ° C. for 2 hours, and hot-rolled to a thickness of 4 mm to obtain a hot-rolled plate. rice field. Next, the hot-rolled plate was annealed and pickled to obtain a hot-rolled annealed plate, and then the hot-rolled annealed plate was cold-rolled to obtain a cold-rolled plate. Next, the cold-rolled plate was annealed, then cooled with water and pickled to obtain a cold-rolled annealed plate (austenitic stainless steel). Comparative Example 8 is a steel grade corresponding to SUS316L containing a large amount of expensive Ni and Mo.

The cold-rolled annealed plate obtained above, and the hot-rolled and hot-rolled annealed plates as intermediate materials thereof were evaluated as follows.

<Manufacturability>
Manufacturability was evaluated by measuring the maximum ear cut length of the hot-rolled plate and observing the oxidation scale on the surface of the hot-rolled annealed plate.
For the maximum ear-cutting length of the hot-rolled plate, the ear-cutting length of the hot-rolled plate was measured, and the maximum value was taken as the maximum ear-cutting length.
As for the oxide scale on the surface of the hot-rolled annealed plate, the presence or absence of black oxide scale on the surface was evaluated after the surface of the hot-rolled annealed plate was cut by 20 μm in the thickness direction.
In the evaluation of manufacturability, those having a maximum ear cut length of 3 mm or less and no oxide scale was observed were accepted (〇), and those having a maximum ear cut length exceeding 3 mm and / or an oxidation scale was not observed were rejected. Passed (x).

<Workability>
The workability was evaluated using a cold-rolled annealed plate obtained by cold rolling to a thickness of 0.3 mm and annealing, water cooling and pickling. The workability was performed in accordance with the tensile test method specified in JIS Z2241: 2011. Specifically, a No. 13B test piece was cut out from the central portion in the width direction of the cold-rolled annealed plate, a tensile test was performed at a tensile speed of 20 mm / min, and elongation (%) was measured. In this evaluation, those with an elongation of 50% that can be processed into various shapes were evaluated as acceptable (◯), and those with an elongation of less than 50% were evaluated as rejected (×).

<Corrosion resistance>
Corrosion resistance was evaluated using a cold-rolled annealed plate obtained by cold rolling to a thickness of 1.0 mm and annealing, water cooling and pickling. Corrosion resistance was performed in accordance with JIS G0577: 2014. The cold-rolled annealed plate was subjected to wet polishing of # 600 after cutting out a test piece having a size of 15 mm × 20 mm from the central portion in the width direction. Next, a portion other than the electrode surface was insulated and coated with a silicone resin so that the electrode surface (exposed portion) of this test piece was 10 mm × 10 mm, and a test piece for pitting corrosion potential measurement was obtained. Next, a test piece for measuring pitting potential was immersed in a 3.5% NaCl solution at 30 ° C. that had been sufficiently degassed with Ar, and anodic polarization was performed at 20 mV / min from the natural potential to perform pitting potential. Was measured. The pitting potential was the potential when a current of 100 μA / cm ² flowed. In this evaluation, the pitting potential was 0.4 V vs. Those having Ag / AgCl (hereinafter, all potentials are based on Ag / AgCl) or more were evaluated as acceptable (◯), and those having less than 0.4 V were evaluated as rejected (x).

The results of each of the above evaluations are shown in Table 2.

As shown in Table 2, since the austenitic stainless steels of Examples 1 to 6 satisfy the predetermined composition and A value, all of the manufacturability, workability and corrosion resistance are good.
On the other hand, the austenitic stainless steels of Comparative Examples 1 and 2 had insufficient manufacturability because the A value was out of the range. The austenitic stainless steel of Comparative Example 3 had an insufficient Ni content, so that the workability was not sufficient. The austenitic stainless steel of Comparative Example 4 had insufficient corrosion resistance because the Cr content was too low. The austenitic stainless steel of Comparative Example 5 had insufficient workability and manufacturability because the N content was too high and the A value was too low. The austenitic stainless steel of Comparative Example 6 had insufficient corrosion resistance and manufacturability because the Cr content was too low and the A value was too low. The austenitic stainless steel of Comparative Example 7 had insufficient corrosion resistance and workability because the Si content was too high and the Cr content was too low. The austenitic stainless steel (SUS316L) of Comparative Example 8 has good manufacturability, workability and corrosion resistance, but contains a large amount of expensive Ni and Mo, so that the manufacturing cost is high.

As can be seen from the above results, according to the present invention, an inexpensive austenitic stainless steel having the same level of corrosion resistance as SUS316L and excellent in workability and manufacturability, and a corrosion resistant member using this austenitic stainless steel are provided. Can be provided.

Claims (5)

Based on mass, C: 0.010 to 0.100%, Si: 2.0% or less, Mn: 3.0% or less, P: 0.035% or less, S: 0.030% or less, Ni: 6 .0 to 14.0%, Cr: 16.0% or more and less than 20.0%, Mo: 3.0% or less, Cu: 0.05 to 3.0%, Al: 0.20% or less, N: An austenite-based stainless steel containing 0.100 to 0.250%, the balance being Fe and impurities, and having an A value of -2 to 5.5 represented by the following formula (1).
A = 3 (Cr + Mo) +4.5Si-2.8Ni-1.4 (Mn + Cu) -84 (C + N) -19.8 (1)
In the formula, Cr, Mo, Si, Ni, Mn, Cu, C and N represent the content (mass%) of each element. The austenitic stainless steel according to claim 1, further comprising B: 0.001 to 0.004% on a mass basis. Further includes one or more selected from Ca: 0.0001% to 0.10%, Mg: 0.0001% to 0.10%, and REM: 0.0001% to 0.10% on a mass basis. The austenitic stainless steel according to claim 1 or 2. On a mass basis, Ti: 0.001% to 1.0%, Nb: 0.001% to 1.0%, V: 0.001% to 1.0%, Zr: 0.001% to 1.0 %, W: 0.001 to 1.0%, Co: 0.001 to 1.0%, Hf: 0.001 to 1.0%, Ta: 0.001 to 1.0%, Sn: 0. The austenite-based stainless steel according to any one of claims 1 to 3, further comprising one or more selected from 001 to 0.10%. A corrosion-resistant member containing the austenitic stainless steel according to any one of claims 1 to 4.