JPS62267450A - High-purity ferritic stainless steel excellent in intergranular corrosion resistance - Google Patents
High-purity ferritic stainless steel excellent in intergranular corrosion resistanceInfo
- Publication number
- JPS62267450A JPS62267450A JP10773386A JP10773386A JPS62267450A JP S62267450 A JPS62267450 A JP S62267450A JP 10773386 A JP10773386 A JP 10773386A JP 10773386 A JP10773386 A JP 10773386A JP S62267450 A JPS62267450 A JP S62267450A
- Authority
- JP
- Japan
- Prior art keywords
- corrosion resistance
- intergranular corrosion
- stainless steel
- welding
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000007797 corrosion Effects 0.000 title claims abstract description 56
- 238000005260 corrosion Methods 0.000 title claims abstract description 56
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract 3
- 238000003466 welding Methods 0.000 abstract description 28
- 229910052799 carbon Inorganic materials 0.000 abstract description 21
- 229910000831 Steel Inorganic materials 0.000 abstract description 16
- 239000010959 steel Substances 0.000 abstract description 16
- 230000006866 deterioration Effects 0.000 abstract description 15
- 238000005336 cracking Methods 0.000 abstract description 5
- 239000010935 stainless steel Substances 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 3
- 108010053481 Antifreeze Proteins Proteins 0.000 abstract 2
- 229910000963 austenitic stainless steel Inorganic materials 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000010953 base metal Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
Landscapes
- Heat Treatment Of Sheet Steel (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分腎〕
本発明は、溶接等の熱履歴を受けた後も耐粒界腐食性に
優れる高純度フェライト系ステンレス鋼に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Industrial Applications] The present invention relates to a high-purity ferritic stainless steel that has excellent intergranular corrosion resistance even after being subjected to thermal history such as welding.
Ｓ ｔＪ Ｓ ４３０鋼で代表される従来のフェライト
系ステレＬス鋼は、通常８５０℃以上の熱処理を行うと
冷却過程で粒界に炭化物が祈出し、Ｃｒ欠乏層が形成さ
れろことにより耐粒界腐食性の劣化が起こる。このため
製造工程では、一旦１０００℃以上に加熱して結晶粒を
均一化したのち、７８０〜８５０℃に再加熱して耐粒界
腐食性の劣化を防止している。Conventional ferritic stainless steel, represented by S tJ S 430 steel, usually has poor grain resistance due to the formation of carbides at grain boundaries during the cooling process and the formation of Cr-depleted layers when heat treated at temperatures above 850°C. Corrosive deterioration occurs. For this reason, in the manufacturing process, the crystal grains are once heated to 1000° C. or higher to make them uniform, and then reheated to 780 to 850° C. to prevent deterioration of intergranular corrosion resistance.
然し、製造工程で厳密な熱管理を行っても、一度溶接等
の熱履歴を受けろと剛粒界賞【１よ著しく・・劣化する
ためこれらの使用は限られてきた。However, even if strict thermal control is performed during the manufacturing process, once subjected to a thermal history such as welding, the hard grain boundary layer deteriorates significantly compared to [1], so their use has been limited.
近年溶製技術の進歩により、耐食性や靭性に悪影響を及
ぼすＣ，Ｎ等の不純物元素を低減し、耐食性を向上させ
たフェライト系ステンレス鋼が開発されている。然し溶
接等の熱履歴による耐粒界腐食性の劣化は十分解決され
ていない。このためＣ，Ｎを低減した上で、Ｎｂ、Ｔｉ
等の安定化元素を添加しＣ，Ｎを固定して炭窒化物の析
出を抑制することにより耐粒界腐食性の劣化を防いでい
るのが現状である。然し、ＮｂやＴ１を添加すると製造
コストの上昇は避けられない。又、極低Ｃ２Ｎ鍔にＮｂ
ｊ６添加すると溶接部の靭性が劣化する等の問題があっ
た。In recent years, advances in melting technology have led to the development of ferritic stainless steels that have improved corrosion resistance by reducing impurity elements such as C and N that adversely affect corrosion resistance and toughness. However, the deterioration of intergranular corrosion resistance due to thermal history such as welding has not been sufficiently resolved. Therefore, after reducing C and N, Nb and Ti
At present, deterioration of intergranular corrosion resistance is prevented by adding stabilizing elements such as these to fix C and N and suppress the precipitation of carbonitrides. However, adding Nb or T1 inevitably increases manufacturing costs. In addition, Nb is added to the extremely low C2N tsuba.
When J6 was added, there were problems such as deterioration of the toughness of the welded part.
本発明は、以上の問題点を８ｖ決するために、コストの
上昇及び溶接部の靭性劣化を招＜ Ｎｂ。The present invention solves the above-mentioned problems by using Nb, which causes an increase in cost and deterioration of the toughness of the welded part.
Ｔｉの添加無しに溶接等の熱履歴による耐粒界腐食性の
劣化を防止しようとするものであり、コスＩ・的に有利
で、且つ熱影響部の靭性を劣化させることなく、溶接等
の熱履歴を受けた後の耐粒界腐食性を向上させろ耐粒界
腐食性に浸れ石高純度フェライト系ステンレス鋼を提供
することを目的とするものでろる。This is intended to prevent deterioration of intergranular corrosion resistance due to thermal history during welding, etc. without the addition of Ti.It is advantageous in terms of cost I and does not deteriorate the toughness of the heat-affected zone. The purpose of the present invention is to improve the intergranular corrosion resistance after being subjected to thermal history and to provide a high-purity ferritic stainless steel with improved intergranular corrosion resistance.
本発明者等は、Ｎｂ、Ｔｉ等の安定化元素を一切添加せ
ず、Ｃ，Ｎ等を極めて低減した高純度フエライＩ・系ス
テンレス鋼の耐粒界腐食性を検討した結果、高純化に加
えてＭＯの添加が耐粒界腐食性を向上させることを見出
し本発明に至ったものである。The present inventors investigated the intergranular corrosion resistance of high-purity Ferrite I stainless steel with extremely reduced C, N, etc. without adding any stabilizing elements such as Nb and Ti. In addition, it was discovered that the addition of MO improves intergranular corrosion resistance, leading to the present invention.
即ち、本発明は、重ｌ基準にて、Ｃ：０．０１％以下、
Ｎ： ０．０１５％以ト、Ｃｒ ： １６〜１９％
、Ｍｏ：１．５〜３．０％、 Ｓ ｉ ： ＩＪ以
下、Ｍｎ：ＩＸ以下、Ｐ： ０．ＯＩＸ以下、Ｓ：Ｏ
，ＯＩＸ以下、残部はＦｅ及び不可避不純物元素から成
る耐粒界腐食性に浸れる高純度フェライト系ステンレス
鋼である。That is, in the present invention, on a weight basis, C: 0.01% or less,
N: 0.015% or more, Cr: 16-19%
, Mo: 1.5-3.0%, Si: IJ or less, Mn: IX or less, P: 0. Below OIX, S:O
, OIX and below, the remainder is high-purity ferritic stainless steel that is resistant to intergranular corrosion and is composed of Fe and unavoidable impurity elements.
後述する実施例の第１図は、耐粒界腐食性に及ぼすＭｏ
影響を示したＭｏ（に）と腐食度（ｇ／ｍ“／ｈｌとの
関係グラフである。このグラフによれば、母材、溶接材
ともＭｏの添加により腐食度は減少する。母材と溶接材
を比較すると、Ｍｏ１％以下では溶接することにより耐
粒界腐食性が著しく劣化する。然しＭＯを１．５％以上
添加すると溶接後も耐粒界腐食性は劣化せず母材間等の
値となる。FIG. 1 of Examples described later shows the effect of Mo on intergranular corrosion resistance.
This is a graph showing the relationship between Mo and the degree of corrosion (g/m"/hl). According to this graph, the degree of corrosion decreases with the addition of Mo in both the base metal and the welding material. Comparing welding materials, welding with less than 1% Mo significantly deteriorates the intergranular corrosion resistance.However, when MO is added at 1.5% or more, the intergranular corrosion resistance does not deteriorate even after welding, and the intergranular corrosion resistance between the base metals etc. The value is .
又Ｃ，Ｎ量も耐粒界腐食性に影響を及ぼす。The amounts of C and N also affect intergranular corrosion resistance.
後述する実施例の第２図は、＋９Ｃｒ−２Ｍｏ鋼の溶接
後の耐粒界腐食性に及ぼすＣ，Ｎの影響を示したＣとＮ
との関係グラフである。この第２図に示す如＜、Ｃ，Ｎ
とも＃４粒界腐食性を劣化させろため極力低減させる必
要がある。ＣとＮを比較するとＣの方が悪影響大である
。Figure 2 of the example described below shows the influence of C and N on intergranular corrosion resistance after welding of +9Cr-2Mo steel.
This is a relationship graph. As shown in this Figure 2, <, C, N
In both cases, it is necessary to reduce the #4 grain boundary corrosion as much as possible since it will deteriorate it. Comparing C and N, C has a greater negative impact.
更に、後述する実施例の第３図は、＋９ｃｒ−２Ｍａｙ
４の溶接部の靭性に及ぼすＮｂの影響を示したＣ＋Ｎと
ｖＴ、との関係グラフである。この第３図に示す如＜、
（：’ＩＮは溶接部の靭性も劣化させるため極力低減さ
せる必要があるが、低Ｃ，Ｎ謂にＮｂを添加するとか丸
って靭性の劣化が起こる。このことから、優れた靭性を
得るためには、低Ｃ，Ｎ。化に加えて、Ｎｂ、Ｔｉ等の
無添加が必要となる９以上の結果よや、高純度化に加え
てＭｏを１．５％９、上添加すればＮｂ、Ｔｉの転化無
しで熱影響部の耐粒界腐食性の劣化が防止出来ろもので
ある。Furthermore, in FIG. 3 of the embodiment described later, +9cr-2May
4 is a graph showing the relationship between C+N and vT, showing the influence of Nb on the toughness of the weld zone of No. 4. As shown in this Figure 3,
(:'IN also deteriorates the toughness of the welded part, so it must be reduced as much as possible, but when Nb is added to low C and N, the toughness deteriorates.From this, it is possible to obtain excellent toughness. In order to achieve a result of 9 or above, in addition to low C and N, it is necessary to not add Nb, Ti, etc. Deterioration of intergranular corrosion resistance in the heat affected zone can be prevented without conversion of Nb and Ti.
即ち、本発明は、高純度化に加え、Ｍｏの添加が溶接等
の熱履歴を受けた後の耐粒界腐食性を向上させるという
新しい知見により達成されたものであり、Ｎｂ、Ｔｉを
添加しない本発明によりコストの上昇及び溶接等の熱影
響部の靭性の劣化を招くという従来の欠点も解消された
ものであるつ次に本発明鋼の成分限定理由について述へ
る。That is, the present invention was achieved based on the new knowledge that, in addition to high purity, the addition of Mo improves the intergranular corrosion resistance after undergoing thermal history such as welding. The present invention eliminates the conventional disadvantages of increasing costs and deteriorating the toughness of heat-affected zones such as welding. Next, the reason for limiting the composition of the steel of the present invention will be described.
Ｃ：母材及び溶接材の耐食性と靭性に著しく有害な元素
であり極力低減する必要がある。０．０１％を越えると
Ｍｏ量を増しても溶接等の熱履歴による耐粒界腐食性の
劣化は避けられない。従ってその上限を０．０ＩＸと規
定したう
Ｎ：Ｃと同様靭性を劣化させると共に溶接材の耐粒界腐
食性を劣化させる元素であり、極力低減する必要がある
。然し、その耐粒界腐食性への悪影響はＣより小さいた
め、上限をＯ，０Ｉ５ｘとＣより許容量を多くした。C: It is an element that is extremely harmful to the corrosion resistance and toughness of the base metal and welding material and needs to be reduced as much as possible. If it exceeds 0.01%, deterioration of intergranular corrosion resistance due to thermal history such as welding cannot be avoided even if the amount of Mo is increased. Therefore, its upper limit is set at 0.0IX. N: Like C, N is an element that deteriorates the toughness and intergranular corrosion resistance of the welding material, and must be reduced as much as possible. However, since its adverse effect on intergranular corrosion resistance is smaller than that of C, the upper limit was set higher than that of O, 0I5x and C.
Ｃｒ：ＩＩ２以下では、所謂ステンレス鍔としての耐食
性を有しない。Ｓ Ｕ Ｓ ３０４クラスの耐食性を得
るには１１位必要であるが、１６〜］９にでは、第１図
に示すように耐食性に有意な差＋、１ない。取り扱い易
さ、コス）・の面からも１９２以下が望ましい。If Cr:II2 or less, it does not have the corrosion resistance as a so-called stainless steel collar. In order to obtain the corrosion resistance of SUS 304 class, 11th rank is required, but as shown in FIG. 1, there is no significant difference in corrosion resistance of 16 to 9. A value of 192 or less is desirable also in terms of ease of handling and cost.
ＭＯ二附孔食性、耐粒界腐食性を向上させる元素である
。特に本発明を構成する重要な元素であり、第１図に示
すように１．５％以上の添加により、溶接後も耐粒界腐
食性の劣化が見られない。３％の添加でその効果は飽和
するので、溶接等の熱履歴による劣化を防止するには１
．５〜３．０にて十分てあり、過剰の添加はコスト的に
不利となる。It is an element that improves MO2 pitting corrosion resistance and intergranular corrosion resistance. In particular, it is an important element constituting the present invention, and as shown in FIG. 1, when added in an amount of 1.5% or more, no deterioration in intergranular corrosion resistance is observed even after welding. The effect is saturated with the addition of 3%, so to prevent deterioration due to heat history such as welding, 1.
．． 5 to 3.0 is sufficient, and excessive addition is disadvantageous in terms of cost.
ＳＩ：溶解精練時の脱酸剤として添加不可欠な元素であ
る。耐食性への影響は少ないが、１％を越えろと熱間加
工性の劣化を招くため上限を１％とする。SI: An essential element added as a deoxidizing agent during melting and scouring. Although it has little effect on corrosion resistance, if it exceeds 1%, hot workability deteriorates, so the upper limit is set at 1%.
Ｐ：靭性の劣化を招くため上限をＯ，Ｏ］Ｘとする。P: Since it causes deterioration of toughness, the upper limit is set to O, O]X.
Ｓ：熱間加工性を劣化させ、またＭ ｎ Ｓ等を形成し
て耐孔食性を劣化させるため０．０１Ｘ以下とする。S: Set to 0.01X or less because it deteriorates hot workability and also forms M n S and the like to deteriorate pitting corrosion resistance.
次に本発明の実施例について述べる。Next, examples of the present invention will be described.
第１表に、供試鋼の化学成分を示す。 Table 1 shows the chemical composition of the test steel.
第１表に示す化学成分からなる発明鋼及び比較鋼をＴＩ
Ｇなめ付は溶接し、Ｊ Ｉ Ｓ ＧＯ５７５による硫酸
、Ｆａ酸銅腐食試験を行った。The invention steel and comparative steel having the chemical components shown in Table 1 were TI
G tanning was performed by welding, and a sulfuric acid and Fa acid copper corrosion test was conducted according to JIS GO575.
試験後４を曲げを行い粒界割れの有無を観察した結果を
併せて第１表に示す。Ｏ印は粒界削れ：無し、×印は粒
界割れ：有を示す。After the test, Sample No. 4 was bent and the presence or absence of grain boundary cracking was observed. The results are also shown in Table 1. The O mark indicates grain boundary abrasion: absent, and the x mark indicates grain boundary cracking: presence.
本発明鋼である１、５％以上のＭｏ添加鋼では粒界割れ
が生ぜずＭｏを１５〜３．０ｚ添加すれば、Ｎｂ。In steel containing 1.5% or more of Mo, which is the steel of the present invention, intergranular cracking does not occur, and if 15 to 3.0z of Mo is added, Nb.
Ｔｉの添加無しで溶接部の耐粒界腐食性の劣化を防止出
来ろ。It is possible to prevent deterioration of intergranular corrosion resistance of welded parts without adding Ti.
＊硫酸、硫酸鋼腐食試験（Ｊ Ｉ ５ＧＯ５７５）第１
図に、耐粒界腐食性に及ぼすＭｏ影響を示したＭ ｏ
（ｇｌと腐食度（ｇ／ｍ”ハ）との関係グラフを示す。*Sulfuric acid, sulfuric acid steel corrosion test (J I 5GO575) 1st
The figure shows the effect of Mo on intergranular corrosion resistance.
(This is a graph showing the relationship between gl and corrosion degree (g/m"c).
このグラフによれば、母材、溶接材ともＭＯの添加によ
す腐食度は減少する。母材と溶接材を比較すると、Ｍｏ
１％以下では溶接することにより耐粒界腐食性が著しく
劣化する。然しＭＯを１．５％以上添加すると溶接後も
耐粒界腐食性は劣化せず母材向等の値となる。According to this graph, the degree of corrosion of both the base metal and the welding material decreases due to the addition of MO. Comparing the base metal and welding material, Mo
If it is less than 1%, intergranular corrosion resistance will be significantly deteriorated by welding. However, when MO is added in an amount of 1.5% or more, the intergranular corrosion resistance does not deteriorate even after welding and becomes the same value as that of the base metal.
又第２図に、１９Ｃｒ−２Ｍｏ鋼の溶接後の耐粒界腐食
性に及ぼすＣ，Ｎの影響を示したＣとＮとの関係グラフ
を示す。第２図に示す如＜、Ｃ，Ｎとも耐粒界腐食性を
劣化させるため極力低減させる必要がある。ＣとＮを比
較するとＣの方が悪影響大である。Further, FIG. 2 shows a relationship graph between C and N showing the influence of C and N on intergranular corrosion resistance after welding of 19Cr-2Mo steel. As shown in FIG. 2, since both C and N deteriorate intergranular corrosion resistance, it is necessary to reduce them as much as possible. Comparing C and N, C has a greater negative impact.
更に、第３図に１９Ｃｒ−２Ｍｏｌｌの溶接部の靭性に
及ぼすＮｂの影響を示したＣ ＋ 、ＮとＶＴＩとの関
係グラフを示す。この第３図に示す如／、、Ｃ，Ｎ１．
！溶接部の靭性も劣化させるため極力低減させる必要が
あるが、低Ｃ，ＮｆｉにＮｂを添加するとかえって靭性
の劣化が起こる。このことから、浸れた靭性を得るため
には、低Ｃ，Ｎ化に加えて、Ｎｂ。Furthermore, FIG. 3 shows a graph of the relationship between C + , N and VTI, showing the influence of Nb on the toughness of a 19Cr-2Moll weld. As shown in FIG. 3, /, C, N1.
! Since it also deteriorates the toughness of the weld, it is necessary to reduce it as much as possible, but adding Nb to low C and Nfi actually causes a deterioration of the toughness. From this, in order to obtain high toughness, in addition to lowering C and N, Nb is added.
Ｔｉ等の無添加が必要となるは明らかである。It is clear that no addition of Ti or the like is required.
本発明の耐粒界腐食性に慢れろ高純度７エライト系ステ
ンレス鋼により、コス１−の上昇及び溶接部の靭性の劣
化を起こすことなく溶接等の熱履歴を受けた後も耐粒界
腐食性に優れるフェライト系ステルス鋼が開発された。Thanks to the high purity 7-elite stainless steel of the present invention, it is resistant to intergranular corrosion even after being subjected to thermal history such as welding without increasing COS and deteriorating the toughness of the welded part. A ferritic stealth steel with excellent properties has been developed.
本発明鋼は、溶接後も良好な耐粒界腐食性、靭性を有す
るため、溶接を伴う分野への使用が可能である。又安価
であり、且つオーステナイト系ステルス鋼の欠点である
耐応力腐食割れ性にも侵ｔｔフィルタａｌ＞、５ＵＳ３
０４．５ＵＳ３１６ノ代替トシて幅広い分野への使用が
可能となった。Since the steel of the present invention has good intergranular corrosion resistance and toughness even after welding, it can be used in fields involving welding. In addition, it is inexpensive and has no resistance to stress corrosion cracking, which is a drawback of austenitic stealth steel.
As an alternative to 04.5 US316, it has become possible to use it in a wide range of fields.
第１図は耐粒界腐食性に及ぼすＭｏ影響を示したＭ ｏ
（２）と腐食度１ｇ／ｍ’ハ）との関係グラフ、第２
図は＋９Ｃｒ−２Ｍｏ鋼の溶接後の耐粒界腐食性に及ぼ
すＣとＮとの関係グラフ、第３図は同じく溶接部の靭性
に及ぼすＮｂの影響を示したＣ十ＮとｖＴ。
との関係グラフである。Figure 1 shows the effect of Mo on intergranular corrosion resistance.
Relationship graph between (2) and corrosion rate 1g/m'c), 2nd
The figure is a graph of the relationship between C and N on the intergranular corrosion resistance after welding of +9Cr-2Mo steel, and Figure 3 shows the effect of Nb on the toughness of the welded joint between C and N and vT. This is a relationship graph.
Claims (1)
以下、Ｃｒ：１６〜１９％、Ｍｏ：１．５〜３．０％、
Ｓｉ：１％以下、Ｍｎ：１％以下、Ｐ：０．０１％以下
、Ｓ：０．０１％以下、残部はＦｅ及び不可避不純物元
素から成ることを特徴とする耐粒界腐食性に優れる高純
度フェライト系ステンレス鋼。Based on weight, C: 0.01% or less, N: 0.015%
Below, Cr: 16-19%, Mo: 1.5-3.0%,
A high grade material with excellent intergranular corrosion resistance characterized by Si: 1% or less, Mn: 1% or less, P: 0.01% or less, S: 0.01% or less, and the remainder consists of Fe and unavoidable impurity elements. Purity ferritic stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10773386A JPS62267450A (en) | 1986-05-13 | 1986-05-13 | High-purity ferritic stainless steel excellent in intergranular corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10773386A JPS62267450A (en) | 1986-05-13 | 1986-05-13 | High-purity ferritic stainless steel excellent in intergranular corrosion resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62267450A true JPS62267450A (en) | 1987-11-20 |
Family
ID=14466569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10773386A Pending JPS62267450A (en) | 1986-05-13 | 1986-05-13 | High-purity ferritic stainless steel excellent in intergranular corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62267450A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5333915A (en) * | 1976-09-10 | 1978-03-30 | Kawasaki Steel Co | Ferritic stainless steel wiih improved rusttresistance on welded area |
-
1986
- 1986-05-13 JP JP10773386A patent/JPS62267450A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5333915A (en) * | 1976-09-10 | 1978-03-30 | Kawasaki Steel Co | Ferritic stainless steel wiih improved rusttresistance on welded area |
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