CN111575591A - Corrosion-resistant stainless steel material - Google Patents

Corrosion-resistant stainless steel material Download PDF

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Publication number
CN111575591A
CN111575591A CN202010589062.6A CN202010589062A CN111575591A CN 111575591 A CN111575591 A CN 111575591A CN 202010589062 A CN202010589062 A CN 202010589062A CN 111575591 A CN111575591 A CN 111575591A
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China
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equal
less
stainless steel
steel material
corrosion
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CN202010589062.6A
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Chinese (zh)
Inventor
黄正林
李艳明
杨芳
陈超
李勇
雷娜
刘希武
王玮
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China Petroleum and Chemical Corp
Sinopec Shanghai Engineering Co Ltd
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China Petroleum and Chemical Corp
Sinopec Shanghai Engineering Co Ltd
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Priority to CN202010589062.6A priority Critical patent/CN111575591A/en
Publication of CN111575591A publication Critical patent/CN111575591A/en
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese

Abstract

The invention relates to a corrosion-resistant stainless steel material which comprises the following components in percentage by weight: less than or equal to 0.010 percent of C, Mn: 1.50-2.00%, P is less than or equal to 0.010%, S is less than or equal to 0.010%, Si is less than or equal to 0.10%, Cr: 22.00-30.00%, Ni: 18.00-25.00%, Mo: 0.50-2.50%, N: 0-0.200%, B is less than or equal to 0.001%, and the balance of Fe and inevitable impurities; wherein the pitting corrosion resistance equivalent weight of the stainless steel material is more than or equal to 35. The Cr-Ni alloy has the advantages that the content of C, P, S is reduced by using Cr-Ni materials, and the corrosion resistance is improved by increasing the content of Cr; the problem of corrosion of high-temperature dilute nitric acid in a coal chemical device is solved, so that the device realizes stable production and the raw material cost of the coal chemical device is reduced; can be applied in engineering, has strong adaptability and is beneficial to popularization.

Description

Corrosion-resistant stainless steel material
Technical Field
The invention relates to the technical field of stainless steel materials, in particular to a corrosion-resistant stainless steel material.
Background
For chemical equipment, steel materials used therein are required to have high strength, excellent corrosion resistance, and excellent weldability. In a coal gasification device, key chemical equipment used by the device needs to have acid corrosion resistance, particularly high-temperature dilute nitric acid corrosion resistance. The main reason is that dilute nitric acid is generated as a byproduct in the synthesis process of intermediate methyl nitrite, and the nitric acid causes reaction and corrosion of subsequent separation pipeline equipment. In addition, in the coalification plant, there is also a small amount of small-molecule organic acid corrosion and intergranular corrosion.
For dilute nitric acid corrosion, it is primarily affected by temperature, nitric acid concentration, and oxidizing ions in the solution. In the prior art, materials used in dilute nitric acid environments include 304L, 310L, nitric acid grade 304L, nitric acid grade 310L, titanium, zirconium, tantalum, niobium, and the like. As for 304L, 310L, nitric acid grade 304L, nitric acid grade 310L and titanium materials, the actual application (or on-site hanging) and laboratory simulated corrosion experiments prove that the materials are seriously corroded and cannot be applied to a high-temperature dilute nitric acid environment. If a material having excellent nitric acid corrosion resistance such as zirconium, tantalum, or niobium is used, the production cost is greatly increased.
Therefore, a corrosion-resistant steel for a high-temperature dilute nitric acid environment, which has excellent corrosion resistance and low price and meets the actual production requirements, is urgently needed.
Disclosure of Invention
The invention aims to provide a corrosion-resistant stainless steel material aiming at the defects in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
the corrosion-resistant stainless steel material comprises the following components in percentage by weight: less than or equal to 0.010 percent of C, Mn: 1.50-2.00%, P is less than or equal to 0.010%, S is less than or equal to 0.010%, Si is less than or equal to 0.10%, Cr: 22.00-30.00%, Ni: 18.00-25.00%, Mo: 0.50-2.50%, N: 0-0.200%, B is less than or equal to 0.001%, and the balance of Fe and inevitable impurities;
wherein the pitting corrosion resistance equivalent weight of the stainless steel material is more than or equal to 35.
Preferably, the paint comprises the following components in percentage by weight: less than or equal to 0.010 percent of C, Mn: 1.55-1.95%, P is less than or equal to 0.010%, S is less than or equal to 0.010%, Si is less than or equal to 0.10%, Cr: 23.00-29.00%, Ni: 19.00-24.00%, Mo: 0.60-2.30%, N: 0.030-0.180 percent, less than or equal to 0.001 percent of B, and the balance of Fe and inevitable impurities.
Preferably, the paint comprises the following components in percentage by weight: less than or equal to 0.010 percent of C, Mn: 1.60-1.90%, P is less than or equal to 0.010%, S is less than or equal to 0.010%, Si is less than or equal to 0.10%, Cr: 24.00-28.00%, Ni: 20.00-23.00%, Mo: 0.80-2.10%, N: 0.050-0.160%, B less than or equal to 0.001%, and the balance of Fe and inevitable impurities.
Preferably, the paint comprises the following components in percentage by weight: less than or equal to 0.010 percent of C, Mn: 1.65-1.85%, P is less than or equal to 0.010%, S is less than or equal to 0.010%, Si is less than or equal to 0.10%, Cr: 25.00-27.00%, Ni: 20.50-22.50%, Mo: 1.00-1.90%, N: 0.070-0.140%, B is less than or equal to 0.001%, and the balance is Fe and inevitable impurities.
Preferably, the paint comprises the following components in percentage by weight: less than or equal to 0.010 percent of C, Mn: 1.70-1.80%, P is less than or equal to 0.010%, S is less than or equal to 0.010%, Si is less than or equal to 0.10%, Cr: 25.50-26.00%, Ni: 21.00-22.00%, Mo: 1.20-1.70%, N: 0.090-0.120%, B is less than or equal to 0.001%, and the balance is Fe and inevitable impurities.
By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:
according to the corrosion-resistant stainless steel material, the content of C, P, S is reduced by using the Cr-Ni material, and the corrosion resistance is improved by increasing the content of Cr; the problem of corrosion of high-temperature dilute nitric acid in a coal chemical device is solved, so that the device realizes stable production and the raw material cost of the coal chemical device is reduced; can be applied in engineering, has strong adaptability and is beneficial to popularization.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.
Example 1
An illustrative embodiment of the invention, a corrosion-resistant stainless steel material, comprises the following components by weight percent: less than or equal to 0.010 percent of C, Mn: 1.50-2.00%, P is less than or equal to 0.010%, S is less than or equal to 0.010%, Si is less than or equal to 0.10%, Cr: 22.00-30.00%, Ni: 18.00-25.00%, Mo: 0.50-2.50%, N: 0-0.200%, B is less than or equal to 0.001%, and the balance of Fe and inevitable impurities;
wherein, the pitting corrosion resistant equivalent weight of the stainless steel material is more than or equal to 35.
The preparation method comprises the following steps:
A. smelting:
smelting the stainless steel material in the proportion by a vacuum induction furnace and electroslag remelting/vacuum self-consumption to obtain molten steel;
or smelting the stainless steel material in the proportion by an electric furnace smelting, an oxygen-hydrogen decarburization furnace AOD/a vacuum oxygen refining furnace VOD and electroslag remelting/vacuum consumable melting to obtain molten steel;
B. continuous casting:
b, continuously casting the molten steel obtained in the step A through a continuous casting machine to obtain a steel billet;
C. forging:
and C, after fully cutting off the electroslag remelting ingot at the head and the tail of the steel billet obtained in the step B, forging the steel billet by a forging method, wherein the total forging ratio of forging is more than 3.
Further, the paint comprises the following components in percentage by weight: less than or equal to 0.010 percent of C, Mn: 1.55-1.95%, P is less than or equal to 0.010%, S is less than or equal to 0.010%, Si is less than or equal to 0.10%, Cr: 23.00-29.00%, Ni: 19.00-24.00%, Mo: 0.60-2.30%, N: 0.030-0.180 percent, less than or equal to 0.001 percent of B, and the balance of Fe and inevitable impurities.
Further, the paint comprises the following components in percentage by weight: less than or equal to 0.010 percent of C, Mn: 1.60-1.90%, P is less than or equal to 0.010%, S is less than or equal to 0.010%, Si is less than or equal to 0.10%, Cr: 24.00-28.00%, Ni: 20.00-23.00%, Mo: 0.80-2.10%, N: 0.050-0.160%, B less than or equal to 0.001%, and the balance of Fe and inevitable impurities.
Further, the paint comprises the following components in percentage by weight: less than or equal to 0.010 percent of C, Mn: 1.65-1.85%, P is less than or equal to 0.010%, S is less than or equal to 0.010%, Si is less than or equal to 0.10%, Cr: 25.00-27.00%, Ni: 20.50-22.50%, Mo: 1.00-1.90%, N: 0.070-0.140%, B is less than or equal to 0.001%, and the balance is Fe and inevitable impurities.
Further, the paint comprises the following components in percentage by weight: less than or equal to 0.010 percent of C, Mn: 1.70-1.80%, P is less than or equal to 0.010%, S is less than or equal to 0.010%, Si is less than or equal to 0.10%, Cr: 25.50-26.00%, Ni: 21.00-22.00%, Mo: 1.20-1.70%, N: 0.090-0.120%, B is less than or equal to 0.001%, and the balance is Fe and inevitable impurities.
Example 2
An embodiment of the present invention.
A stainless steel material comprises the following components in percentage by weight: c: 0.010%, Mn: 1.50%, P: 0.010%, S: 0.010%, Si: 0.10%, Cr: 22.75%, Ni: 18.00%, Mo: 2.50%, N: 0.200%, B: 0.0005%, and the balance Fe and inevitable impurities, and has a pitting resistance equivalent of 35.00.
The manufacturing method is the same as example 1.
Example 3
An embodiment of the present invention.
A stainless steel material comprises the following components in percentage by weight: c: 0.008%, Mn: 1.65%, P: 0.008%, S: 0.006%, Si: 0.08%, Cr: 25.65%, Ni: 20.65%, Mo: 2.50%, N: 0.100%, B: 0.0006% and the balance of Fe and inevitable impurities, having a pitting resistance equivalent of 35.90.
The manufacturing method is the same as example 1.
Example 4
An embodiment of the present invention.
A stainless steel material comprises the following components in percentage by weight: c: 0.006%, Mn: 1.55%, P: 0.007%, S: 0.009%, Si: 0.06%, Cr: 29.69%, Ni: 21.35%, Mo: 1.58%, N: 0.075%, B: 0.0005%, the balance being Fe and unavoidable impurities, and having a pitting resistance equivalent of 36.40.
The manufacturing method is the same as example 1.
Example 5
An embodiment of the present invention.
A stainless steel material comprises the following components in percentage by weight: c: 0.007%, Mn: 1.82%, P: 0.009%, S: 0.008%, Si: 0.07%, Cr: 28.79%, Ni: 22.56%, Mo: 2.00%, B: 0.0004% and the balance of Fe and inevitable impurities, having a pitting resistance equivalent of 36.39.
Example 6
An embodiment of the present invention.
A stainless steel material comprises the following components in percentage by weight: c: 0.007%, Mn: 1.85%, P: 0.009%, S: 0.006%, Si: 0.07%, Cr: 29.80%, Ni: 20.34%, Mo: 1.00%, N: 0.150%, B: 0.0005%, and the balance Fe and inevitable impurities, and has a pitting resistance equivalent of 36.10.
Example 7
An embodiment of the present invention.
A stainless steel material comprises the following components in percentage by weight: c: 0.005%, Mn: 1.93%, P: 0.006%, S: 0.008%, Si: 0.05%, Cr: 29.49%, Ni: 23.22%, Mo: 0.500%, N: 0.200%, B: 0.0003% and the balance of Fe and inevitable impurities, having a pitting resistance equivalent of 35.14.
Example 8
An embodiment of the present invention.
A stainless steel material comprises the following components in percentage by weight: c: 0.006%, Mn: 1.96%, P: 0.006%, S: 0.007%, Si: 0.09%, Cr: 30.00%, Ni: 22.68%, Mo: 1.500%, B: 0.0007% and the balance of Fe and inevitable impurities, having a pitting resistance equivalent of 35.15.
Example 9
An embodiment of the present invention.
A stainless steel material comprises the following components in percentage by weight: c: 0.007%, Mn: 1.63%, P: 0.005%, S: 0.007%, Si: 0.06%, Cr: 30.00%, Ni: 24.12%, Mo: 0.310%, N: 0.200%, B: 0.0003% and the balance of Fe and inevitable impurities, and has a pitting resistance equivalent of 35.02.
Example 10
An embodiment of the present invention.
A stainless steel material comprises the following components in percentage by weight: c: 0.009%, Mn: 1.76%, P: 0.007%, S: 0.005%, Si: 0.08%, Cr: 30.00%, Ni: 23.64%, Mo: 2.500%, N: 0.200%, B: 0.0008% and the balance of Fe and inevitable impurities, and has a pitting resistance equivalent of 42.25.
For examples 2 to 10, the summary is shown in table 1 below:
TABLE 1
C％ Mn％ P％ S％ Si％ Cr％ Ni％ Mo％ N％ B％
Example 2 0.010 1.50 0.010 0.010 0.10 22.75 18.00 2.50 0.200 0.0005
Example 3 0.008 1.65 0.008 0.006 0.08 25.65 20.65 2.50 0.100 0.0006
Example 4 0.006 1.73 0.007 0.009 0.06 29.69 21.35 1.58 0.075 0.0005
Example 5 0.007 1.82 0.009 0.008 0.07 28.79 22.56 2.00 0.050 0.0004
Example 6 0.007 1.85 0.009 0.006 0.07 29.80 20.34 1.00 0.150 0.0005
Example 7 0.005 1.93 0.006 0.008 0.05 29.49 23.22 0.50 0.200 0.0003
Example 8 0.006 1.96 0.006 0.007 0.09 30.00 22.68 1.50 0.010 0.0007
Example 9 0.007 1.63 0.005 0.007 0.06 30.00 24.12 0.31 0.200 0.0003
Example 10 0.009 1.76 0.007 0.005 0.08 30.00 23.64 2.50 0.200 0.0008
Example 11
This example is an application study of the stainless steel material of examples 2 to 10.
In this example, the stainless steel materials of examples 2 to 10 were subjected to a concentrated nitric acid corrosion test.
The test in this example is a 65 wt.% nitric acid corrosion test (hough stainless steel corrosion test) based on GB/T4334-.
The test equipment comprises a 1000ml glass flask, an electric heating jacket, a serpentine condenser tube and the like.
The test specimen specification was 40mm × 13mm × 2mm, see NACE TM 0169-2012.
The test sample states include a solid solution state, a sensitized state, a welded state and the like.
The specific test steps are as follows: the test specimens were immersed in the boiling test solution for 48 hours (1 st immersion test); after the 1 st dipping test is finished, preparing a new test solution and carrying out the 2 nd dipping test; taking out a sample from the test solution used in the 1 st immersion test, and immersing the sample in the test solution for the 2 nd immersion test for 48 hours; the dipping test was repeated 5 times or more (1 st to 5 th).
The mass of the sample was measured before and after each dipping test to find the difference. The corrosion rate (mm/a) was calculated from the weight loss and the uniform corrosion rate was less than 0.1mm/a for all samples. After the test was completed, all the samples still had metallic luster. As a result of observation by a metallographic microscope, no significant intergranular corrosion occurred in any of the stainless steel materials of examples 2 to 10 in 5 test cycles.
Example 12
This example is an application study of the stainless steel material of examples 2 to 10.
In this example, the stainless steel material of examples 2 to 10 was subjected to a high-temperature dilute nitric acid corrosion test.
The test apparatus includes: tetrafluoroethylene reaction kettle, oil bath pan, etc.
The test specimen specification was 40mm × 13mm × 2mm, see NACE TM 0169-2012.
The test sample states include a solid solution state, a sensitized state, a welded state and the like.
The specific test steps are as follows: mounting the sample on a polytetrafluoroethylene insulating support, placing the sample in a reaction kettle, and injecting a test solution (the ratio of the volume of the solution to the surface area of the sample is not less than 20 mL/cm)2) (ii) a Covering the kettle cover, sealing with a stainless steel kettle sleeve, and heating in an oil bath kettle to a test temperature of 130 ℃ and keeping the temperature constant; the test specimens were immersed in the test solution for 48 hours (1 st immersion test). After the 1 st dipping test is finished, preparing a new test solution and carrying out the 2 nd dipping test; taking out a sample from the test solution used in the 1 st immersion test, and immersing the sample in the test solution for the 2 nd immersion test for 48 hours; the dipping test was repeated 5 times or more (1 st to 5 th).
The mass of the sample was measured before and after each dipping test to find the difference. The corrosion rate (mm/a) was calculated from the weight loss and the uniform corrosion rate was less than 0.05mm/a for all samples. After the test was completed, all the samples still had metallic luster. The microscopic morphology of the samples after the 5 immersion tests was observed by a microscope, and as a result, no significant intergranular corrosion occurred in any of the stainless steel materials of examples 2 to 10.
Example 13
This example is an application study of the stainless steel material of examples 2 to 10.
In this example, the stainless steel material of examples 2 to 10 was subjected to an on-site hanging test.
The coupon samples prepared in examples 2-10 were placed in the tower of a chemical plant. In the tower, the medium comprises nitric acid, methanol, formic acid, acetic acid, hydrofluoric acid and the like, the temperature of the medium fluctuates within the range of 100-130 ℃, and the concentration of the nitric acid fluctuates within the range of 2-20%.
The test sample states include a solid solution state, a sensitized state, a welded state and the like.
And (3) test period: about 360 days.
The specific test steps are as follows: after acetone oil removal and ethanol dehydration are carried out on the coupon sample, size and weight measurement is carried out on the coupon sample, and then the coupon sample is placed into a drying oven to be dried; and (2) mounting the dried coupon samples on a coupon rack in a certain sequence, isolating the coupon samples by using positioning rings, and recording the coupon rack number and the coupon sample number, wherein the positioning rings are made of tetrafluoroethylene material in a low-temperature environment (the temperature is less than or equal to 150 ℃) and are made of ceramic material in a high-temperature environment (the temperature is more than 150 ℃).
After the coupon test was completed, the mass of the coupon sample was measured and the difference was determined. The corrosion rate (mm/a) was calculated from the weight loss and the uniform corrosion rate was less than 0.04mm/a for all samples. After the test was completed, all the samples still had metallic luster. The coupon samples were observed by a microscope, and as a result, no significant intergranular corrosion occurred under any of the stainless steel materials of examples 2 to 10.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.

Claims (5)

1. The corrosion-resistant stainless steel material is characterized by comprising the following components in percentage by weight: less than or equal to 0.010 percent of C, Mn: 1.50-2.00%, P is less than or equal to 0.010%, S is less than or equal to 0.010%, Si is less than or equal to 0.10%, Cr: 22.00-30.00%, Ni: 18.00-25.00%, Mo: 0.50-2.50%, N: 0-0.200%, B is less than or equal to 0.001%, and the balance of Fe and inevitable impurities;
wherein the pitting corrosion resistance equivalent weight of the stainless steel material is more than or equal to 35.
2. Stainless steel material according to claim 1, characterized by comprising, in weight percent: less than or equal to 0.010 percent of C, Mn: 1.55-1.95%, P is less than or equal to 0.010%, S is less than or equal to 0.010%, Si is less than or equal to 0.10%, Cr: 23.00-29.00%, Ni: 19.00-24.00%, Mo: 0.60-2.30%, N: 0-0.180%, B is less than or equal to 0.001%, and the balance is Fe and inevitable impurities.
3. Stainless steel material according to claim 2, characterized by comprising, in weight percent: less than or equal to 0.010 percent of C, Mn: 1.60-1.90%, P is less than or equal to 0.010%, S is less than or equal to 0.010%, Si is less than or equal to 0.10%, Cr: 24.00-28.00%, Ni: 20.00-23.00%, Mo: 0.80-2.10%, N: 0.050-0.160%, B less than or equal to 0.001%, and the balance of Fe and inevitable impurities.
4. A stainless steel material according to claim 3, characterized by comprising, in weight percent: less than or equal to 0.010 percent of C, Mn: 1.65-1.85%, P is less than or equal to 0.010%, S is less than or equal to 0.010%, Si is less than or equal to 0.10%, Cr: 25.00-27.00%, Ni: 20.50-22.50%, Mo: 1.00-1.90%, N: 0.070-0.140%, B is less than or equal to 0.001%, and the balance is Fe and inevitable impurities.
5. Stainless steel material according to claim 4, characterized by comprising, in weight percent: less than or equal to 0.010 percent of C, Mn: 1.70-1.80%, P is less than or equal to 0.010%, S is less than or equal to 0.010%, Si is less than or equal to 0.10%, Cr: 25.50-26.00%, Ni: 21.00-22.00%, Mo: 1.20-1.70%, N: 0.090-0.120%, B is less than or equal to 0.001%, and the balance is Fe and inevitable impurities.
CN202010589062.6A 2020-06-24 2020-06-24 Corrosion-resistant stainless steel material Pending CN111575591A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB872052A (en) * 1956-10-19 1961-07-05 United States Steel Corp Stainless steel resistant to nitric acid corrosion
GB1248980A (en) * 1970-07-02 1971-10-06 Nippon Kinzoku Kogyo Kabushiki Sea water-resistant stainless steel
CN1942596A (en) * 2004-01-13 2007-04-04 三菱重工业株式会社 Austenitic stainless steel, method for producing same and structure using same
CN103620076A (en) * 2011-06-24 2014-03-05 新日铁住金株式会社 Method for producing austenitic stainless steel and austenitic stainless steel material
CN104032233A (en) * 2014-05-27 2014-09-10 中国核动力研究设计院 Austenite stainless steel and a manufacturing technology thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB872052A (en) * 1956-10-19 1961-07-05 United States Steel Corp Stainless steel resistant to nitric acid corrosion
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Application publication date: 20200825