JPH01119649A - Corrosion-resisting stainless steel having high strength and high toughness - Google Patents
Corrosion-resisting stainless steel having high strength and high toughnessInfo
- Publication number
- JPH01119649A JPH01119649A JP27566987A JP27566987A JPH01119649A JP H01119649 A JPH01119649 A JP H01119649A JP 27566987 A JP27566987 A JP 27566987A JP 27566987 A JP27566987 A JP 27566987A JP H01119649 A JPH01119649 A JP H01119649A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- stainless steel
- strength
- content
- toughness
- 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
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 15
- 239000010935 stainless steel Substances 0.000 title claims abstract description 13
- 230000007797 corrosion Effects 0.000 claims abstract description 16
- 238000005260 corrosion Methods 0.000 claims abstract description 16
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 5
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 5
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 229910052799 carbon Inorganic materials 0.000 claims abstract 3
- 229910052710 silicon Inorganic materials 0.000 claims abstract 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 24
- 239000010959 steel Substances 0.000 abstract description 24
- 239000000203 mixture Substances 0.000 abstract description 5
- 229910052748 manganese Inorganic materials 0.000 abstract description 4
- 229910000734 martensite Inorganic materials 0.000 abstract description 3
- 239000013535 sea water Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 238000001556 precipitation Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 12
- 230000032683 aging Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 229910001566 austenite Inorganic materials 0.000 description 5
- 150000001247 metal acetylides Chemical class 0.000 description 5
- 239000002436 steel type Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 230000001687 destabilization Effects 0.000 description 4
- 238000004881 precipitation hardening Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- -1 CrxsCh Chemical class 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、耐食性が優れ、高強度・高靭性を有するマル
テンサイト系析出硬化型ステンレス鋼に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a martensitic precipitation-hardening stainless steel that has excellent corrosion resistance, high strength, and high toughness.
（従来の技術と発明が解決しようとする問題点）従来か
ら析出硬化型のステンレス鋼として５ＵＳ６３０が知ら
れている。しかしながら、この鋼種は、Ｃｕの含有量が
３．５重量％以上になると熱間加工時に割れを生じ、鋼
材に仕上げることが容易でない。(Prior Art and Problems to be Solved by the Invention) 5US630 has been known as a precipitation hardening stainless steel. However, in this steel type, if the Cu content exceeds 3.5% by weight, cracks occur during hot working, making it difficult to finish the steel material.
更に、Ｈ９００時効材（時効温度；４８０°Ｃ）は、常
温下における０、２％耐力が約１２５ｋｇｆ／ ｍａ”
、引張強さが約１４０ｋｇｆ／ ｍｍ”、衝撃値が２＋
ｗｍＶノツチ付で２ｋｇｆ−ｍ以下と非常に脆弱な鋼種
であり、これを常温の大気中に放置しておくと材料中に
亀裂が走り、いわゆる置割れと呼ばれる現象が発生する
。この置割れの発生を防ぐために、上記鋼種を固溶化処
理したのち５８０〜６１０°Ｃで時効処理を施すことが
行われているが、しかしこの時効温度は可成りの高温で
あるため、得られた材料は、その０．２％耐力が約８０
ｋｇｆ／ ｍｍ”、引張強さが約９８ｋｇｆ／ ｍｍ”
にまで低下してしまってＳＯ５４３１（１６Ｃｒ−２Ｎ
＋）と同基準の材料になってしまう。しかも、時効が進
むと、得られる鋼種の耐食性は劣化してくるという問題
がある。Furthermore, H900 aged material (aging temperature: 480°C) has a 0.2% yield strength of approximately 125 kgf/ma at room temperature.
, tensile strength is approximately 140kgf/mm”, impact value is 2+
It is a very fragile steel type with a wmV notch and a weight of less than 2 kgf-m, and if it is left in the atmosphere at room temperature, cracks will run through the material and a phenomenon called so-called cracking will occur. In order to prevent the occurrence of this cracking, the above steel types are subjected to solution treatment and then subjected to aging treatment at 580 to 610°C. However, this aging temperature is quite high, so it is difficult to obtain The 0.2% yield strength of the material is approximately 80
kgf/mm”, tensile strength is approximately 98kgf/mm”
SO5431 (16Cr-2N
+) and the material will be of the same standard. Moreover, as aging progresses, there is a problem in that the corrosion resistance of the steel obtained deteriorates.
本発明は、上記したような問題を解消し、高強度・高靭
性であると同時に耐食性が優れ、また、熱間加工性も良
好で、置割れを起こすことのない新規組成の析出硬化型
ステンレス鋼の提供を目的とする。The present invention solves the above-mentioned problems and provides a precipitation hardening stainless steel with a new composition that has high strength and toughness, excellent corrosion resistance, good hot workability, and does not cause cracking. The purpose is to provide steel.
（問題点を解決するための手段）
本発明のステンレス鋼は、その組成が、重量％で、Ｃ：
０．０８％以下、ＳＬ：２．０％以下、Ｍｎ＝３．０％
以下、Ｃｕ ： ０．５〜３．０％、Ｎｉ：４．０％〜
７．０％、Ｃｒ ： ８．０〜１５．０％、Ｍｏ ：
０．５〜４．０％、Ｖ ： ０．１〜２．０％、Ｃｏ
： ３．０〜７．０％、Ａｌ：０．５〜２．０％、Ｎｔ
ｚｏ、１〜１．０％、Ｂ：０．００５〜０．１００％、
Ｎ：０．０８〜０．１５％を含有し、残部Ｆｅと不可避
的不純物から成ることをを特徴とする。(Means for Solving the Problems) The stainless steel of the present invention has a composition in weight% of C:
0.08% or less, SL: 2.0% or less, Mn=3.0%
Below, Cu: 0.5 to 3.0%, Ni: 4.0% to
7.0%, Cr: 8.0-15.0%, Mo:
0.5-4.0%, V: 0.1-2.0%, Co
: 3.0-7.0%, Al: 0.5-2.0%, Nt
zo, 1-1.0%, B: 0.005-0.100%,
It is characterized by containing N: 0.08 to 0.15%, with the remainder consisting of Fe and inevitable impurities.
以下に、本発明のステンレス鋼における各成分元素の含
有量の範囲の限定理由を述べる。Below, the reason for limiting the content range of each component element in the stainless steel of the present invention will be described.
旦エム立工各共上
Ｃは鋼の強度向上に資する成分であるが、しかしその含
有量が多すぎる場合は、Ｃｒと反応してＣｒｘｓＣｈの
ような炭化物を生成し、その結果、得られた鋼の耐食性
が低下するので、その含有量は０．０８％以下とする。C is a component that contributes to improving the strength of steel, but if its content is too large, it reacts with Cr to produce carbides such as CrxsCh, resulting in Since the corrosion resistance of steel decreases, its content should be 0.08% or less.
好ましくは、０．０２〜０．０５％でしある。Preferably it is 0.02 to 0.05%.
互」」」ユ射０人下
Ｓｉは脱酸作用を有する必須の成分であるが、しかしそ
の含有量が多すぎる場合は、結晶粒が粗大化して得られ
た鋼の脆化を招くので、含有量の上限値は２．０％とす
る。好ましくは、０．０５〜０．２％である。Si is an essential component that has a deoxidizing effect, but if its content is too large, the crystal grains will become coarse and the resulting steel will become brittle. The upper limit of the content is 2.0%. Preferably it is 0.05 to 0.2%.
瓦Ａ」ユ」」穎肱工
ＭｎもＳｌと同様強力な脱酸作用を有する成分であるが
、しかしその含有量が多すぎる場合は、オーステナイト
を安定し残留オーステナイトを生成して異相を生ずると
いうような不都合を招くので、含有量の上限値は３．０
％とする。好ましくは、０．３０〜１．５０％である。Similar to Sl, Mn is a component that has a strong deoxidizing effect, but if its content is too large, it stabilizes austenite and produces residual austenite, resulting in different phases. Therefore, the upper limit of the content is 3.0.
%. Preferably it is 0.30 to 1.50%.
Ｃｕ ： ０．５〜３．０
Ｃｕは時効処理時に６相となって析出硬化作用を果たし
、その結果、得られた鋼の強度の向上に資する成分であ
る。その含有量が０．５％未満の場合は、上記効果は発
現せず、また、３．０％を超える場合は、熱間加工時に
割れの発生を招くので、。Cu: 0.5 to 3.0 Cu is a component that forms six phases during aging treatment and performs a precipitation hardening action, thereby contributing to improving the strength of the obtained steel. If the content is less than 0.5%, the above effects will not be achieved, and if it exceeds 3.0%, cracks will occur during hot working.
その含有量は０．５〜３．０％とする。好ましくは、１
．５〜２．５％である。Its content is 0.5 to 3.0%. Preferably 1
．． It is 5 to 2.5%.
Ｎｉ ：４．０％〜７．０％
Ｎｉは強度、靭性、耐食性のいずれの特性の向上にも資
する成分であって、本発明鋼の性質を大きく左右する。Ni: 4.0% to 7.0% Ni is a component that contributes to improving the properties of strength, toughness, and corrosion resistance, and greatly influences the properties of the steel of the present invention.
その含有量が４．０％未満の場合は、得られた鋼の耐食
性が向上せずまた７、０％を超える場合は、鋼中に残留
オーステナイトが生成して組織の不安定化を招くので、
その含有量は４．０〜７．０％とする。好ましく↓よ、
４．０〜５．５％である。If the content is less than 4.0%, the corrosion resistance of the resulting steel will not improve, and if it exceeds 7.0%, retained austenite will be generated in the steel, leading to destabilization of the structure. ,
Its content is 4.0 to 7.0%. I like it ↓
It is 4.0 to 5.5%.
Ｃｒ ： ８．０〜１５．０％
Ｃｒは耐食性の向上に資する成分であり、その含有量が
８．０％未満の場合はその効果が発現せず、また１５．
０％を超える場合は、鋼中にδフェライトが生成して鋼
の強度を低下せしめるので、その含有量は８．０〜１５
．０％とする。好ましくは、１０．０−１４．５−％で
ある。Cr: 8.0 to 15.0% Cr is a component that contributes to improving corrosion resistance, and if its content is less than 8.0%, the effect will not be expressed, and 15.
If it exceeds 0%, δ ferrite will be generated in the steel and reduce the strength of the steel, so the content should be 8.0 to 15%.
．． Set to 0%. Preferably it is 10.0-14.5%.
Ｍ ｏ ： ０．５〜４．０％
Ｍｏは耐食性の維持・確保にとって必須であると同時に
、時効処理時に炭化物に転化して鋼の２次硬化に資する
成分である。含有量が０．５％未満の場合には、上記効
果は達成されず、また４、０％を超える場合は鋼中にδ
フェライトが生成して強度の低下、組織の不安定化を招
くので、その含有量は０．５〜４．０％とする。好まし
くは、１．５〜２．５％である。Mo: 0.5 to 4.0% Mo is essential for maintaining and ensuring corrosion resistance, and at the same time is a component that converts into carbides during aging treatment and contributes to secondary hardening of steel. If the content is less than 0.5%, the above effects will not be achieved, and if it exceeds 4.0%, δ
Since ferrite is generated and causes a decrease in strength and destabilization of the structure, its content is set to 0.5 to 4.0%. Preferably it is 1.5 to 2.5%.
Ｖ：Ｑ、ｌ〜２．０％
■は炭化物を生成せしめかつ結晶粒を微細化して鋼に強
度、靭性を付与する成分であり、その含有量が０．１％
未満の場合は上記効果を発揮せず、また、２．０％を超
える場合は、鋼中にδフェラインが生成して強度低下を
もたらすともに組織の不安定化を招くので、その含有量
は０．１〜２．０％とする。好ましくは、０．１０〜０
．５０％である。V: Q, l ~ 2.0% ■ is a component that generates carbides and refines grains to give strength and toughness to steel, and its content is 0.1%
If the content is less than 2.0%, the above effects will not be exhibited, and if it exceeds 2.0%, δ ferrine will be generated in the steel, resulting in a decrease in strength and destabilization of the structure. The content should be 0.1 to 2.0%. Preferably 0.10-0
．． It is 50%.
Ｃｏ ： ３．０〜７．０％
Ｃｏは基地の強度、靭性を安定化するに有効な成分であ
ると何時に、高温強度の維持にとって必須な成分である
。含有量が３．０％未満の場合は、上記効果が発揮され
ず、また７、０％を超える場合は鋼中に残留オーステナ
イトが生成して組織の不安定化を招くので、その含有量
は３．０〜７．０％とする。好ましくは４．０〜６．０
％である。Co: 3.0 to 7.0% Co is an effective component for stabilizing the strength and toughness of the matrix, and is also an essential component for maintaining high temperature strength. If the content is less than 3.0%, the above effects will not be exhibited, and if it exceeds 7.0%, retained austenite will be generated in the steel and cause the structure to become unstable. 3.0 to 7.0%. Preferably 4.0 to 6.0
%.
Ａｘ：０．５〜２．０％
Ａｊ２はＮｉと金属間化合物を生成して鋼の強度の向上
に資する成分である。含有量が０．５％未満の場合は、
上記効果が発揮されず、また２、０％を超える場合は鋼
中にδフェライトが生成して組織の不安定化を招くので
、その含有量は０．５〜２．０％とする。好ましくは、
１．０〜１．５％である。Ax: 0.5 to 2.0% Aj2 is a component that forms an intermetallic compound with Ni and contributes to improving the strength of steel. If the content is less than 0.5%,
The above effects are not exhibited, and if it exceeds 2.0%, δ ferrite is generated in the steel, leading to destabilization of the structure, so the content is set to 0.5 to 2.0%. Preferably,
It is 1.0-1.5%.
Ｎｂ：ｏ、ｔ〜１．０％
Ｎｂは基地中のＣと結合して炭化物を生成して耐食性の
向上に資するとともに、結晶粒を微細化して靭性の向上
に資する成分である。その含有量が０．１％未満の場合
は上記効果が発揮されず、また１、０％を超える場合は
巨大なＮｂ炭化物、後述するＮと反応して成る窒化物を
生成して綱をよごすので、その含有量は０．１〜１．０
％とする。好ましくは０．１０〜０．５０％である。Nb: o, t~1.0% Nb is a component that combines with C in the matrix to form carbides and contributes to improving corrosion resistance, and also contributes to improving toughness by refining crystal grains. If the content is less than 0.1%, the above effect will not be exhibited, and if it exceeds 1.0%, giant Nb carbides and nitrides formed by reacting with N, which will be described later, will be produced and the rope will become dirty. Therefore, its content is 0.1 to 1.0
%. Preferably it is 0.10 to 0.50%.
Ｂは結晶粒界を強化して鋼の高温強度を向上せしめるた
めに有効な成分であり、その添加効果はｏ、ｏｏｓ％以
上から発現するが、しかし０．１００％を超えて添加さ
れると、ＦｅｚＢというような低融点の化合物をつくり
鍛造割れのような不都合を招くので、その含有量はｏ、
ｏｏｓ〜０．１００％とする。好ましくは、ｏ 、ｏｏ
ｓ〜０．０３％である。B is an effective component for strengthening grain boundaries and improving the high-temperature strength of steel, and the effect of its addition appears from o, oos% or more, but if it is added in excess of 0.100%, , FezB, which creates low melting point compounds and causes problems such as forging cracks, so its content should be o,
oos to 0.100%. Preferably o, oo
s~0.03%.
Ｎ ： ０．０８〜０．１５％
Ｎはオーステナイトを生成せしめて鋼の強度の向上に資
する成分である。含有量が０．０８％未満の場合は上記
した効果が発揮されず、また０、１５％を超えると鋼の
溶接性が低下して構造部材としての有用性を喪失するの
で、その含有量はｏ、ｏｏｓ〜０゜１５％とする。好ま
しくは０．０８〜０．１２％である。N: 0.08 to 0.15% N is a component that generates austenite and contributes to improving the strength of steel. If the content is less than 0.08%, the above effects will not be exhibited, and if it exceeds 0.15%, the weldability of the steel will decrease and it will lose its usefulness as a structural member. o, oos ~ 0°15%. Preferably it is 0.08 to 0.12%.
不２珂拠 不可避的不純物としては、例えばＰ、Ｓ、Ｏ。Non-2K basis Examples of unavoidable impurities include P, S, and O.
Ｈをあげることができるが、これら不純物の含有量は極
力少ないことが望ましく、通常、総量で３５０ｐｐ−以
下とする。Although H can be increased, it is desirable that the content of these impurities be as small as possible, and usually the total amount is 350 pp- or less.
本発明のステンレス鋼には次のような熱処理を施すこと
が好ましい、すなわち、１０００〜１１００°Ｃの温度
域に１７２〜３時間保持したのち急冷して組織をマルテ
ンサイト化し、最後に４５０〜５３０℃の温度域で１〜
４時間保持したのち急冷して時効処理を施す。The stainless steel of the present invention is preferably subjected to the following heat treatment; that is, it is kept in a temperature range of 1000 to 1100 °C for 172 to 3 hours, then rapidly cooled to make the structure martensite, and finally 1~ in the temperature range of °C
After holding for 4 hours, it is rapidly cooled and subjected to aging treatment.
（発明の実施例）
第１表に示した成分組成の鋼種Ｓ、〜Ｓ、のインゴット
を鍛伸して直径２０ｍｍの鍛伸材とし、これらを１０４
０℃で１時間、熱処理したのち油冷し、更に４８０°Ｃ
で１時間熱処理したのち空冷した。なお、比較例（Ｃｔ
）として５ＵＳ６３０を選んだ。(Embodiment of the invention) Ingots of steel types S, ~S, having the compositions shown in Table 1 are forged and drawn into forged and drawn materials with a diameter of 20 mm, and these are made into 104
Heat treated at 0℃ for 1 hour, cooled in oil, and further heated to 480℃
After heat treatment for 1 hour, it was air cooled. In addition, comparative example (Ct
) was selected as 5US630.
これらの各ステンレス鋼の常温における特性値を第２表
に示した。また、これらステンレス鋼を沸とうする５％
硫酸液中に６時間浸漬し、そのときの重量減少（ｇ）を
、鋼の表面積（ｍ：）と浸漬時間（ｈｒ）で除して腐食
減量（ｇ／ｍ”・ｈｒ）を算出し、その結果もあわせて
第２表に示した。Table 2 shows the characteristic values of each of these stainless steels at room temperature. In addition, 5% of these stainless steels are boiled.
Immerse it in a sulfuric acid solution for 6 hours, and calculate the corrosion loss (g/m"・hr) by dividing the weight loss (g) by the surface area of the steel (m:) and the immersion time (hr). The results are also shown in Table 2.
第２表から明らかなように、本発明の鋼は５ＵＳ６３０
に比べて伸び、絞り特性は遜色がなく路間等であり、し
かし０．２％耐力、引張り強度ではいずれもはるかに優
れており、しかも靭性の尺度である衝撃値においては５
ＵＳ６３０の約２倍の値を示している。また、腐食減量
も少なく５ＵＳ６３０に比べて耐食性が優れている。As is clear from Table 2, the steel of the present invention is 5US630
The elongation and drawing properties are comparable to those of the 100% roadway, but the 0.2% yield strength and tensile strength are both far superior, and the impact value, which is a measure of toughness, is 5.
The value is approximately twice that of US630. In addition, the corrosion loss is small and the corrosion resistance is superior to that of 5US630.
（発明の効果）
以上の説明で明らかなように、本発明のステンレス鋼は
、その成分組成を、重量％で、Ｃ： ０．０８％以下、
Ｓｉ１．０％以下、Ｍｎ：３．０％以下、Ｃｕ ： ０
．５〜３．０％、Ｎｉ：４．Ｏ％〜７．０％、Ｃｒ：８
．０〜１５．０％、Ｍ ｏ ： ０．５〜４．０％、Ｖ
：０．１〜２．０％、Ｃｏ ： ３．０〜７．０％、Ａ
Ｎ ： ０．５〜２．０％、Ｎｂ：ｏ、ｔ〜１．０％
、Ｂ ： ０．００５〜ｏ、ｔｏｏ％、Ｎ ： ０．０
８〜０．１５％を含有し、残部Ｆｅと不可避的不純物で
あるようにしたので、従来の鋼種に比べてその強度、靭
性、耐食性が向上する。したがって、本発明のステンレ
ス鋼は、海水中で用いる各種の構造部材（例えば、ポン
プ、シャフト、バルブ）や化学プラント用の構造部材と
してその工業的価値は大である。(Effects of the Invention) As is clear from the above explanation, the stainless steel of the present invention has a composition in weight% of C: 0.08% or less,
Si 1.0% or less, Mn: 3.0% or less, Cu: 0
．． 5-3.0%, Ni:4. O%~7.0%, Cr:8
．． 0-15.0%, Mo: 0.5-4.0%, V
: 0.1-2.0%, Co: 3.0-7.0%, A
N: 0.5-2.0%, Nb: o, t-1.0%
, B: 0.005~o, too%, N: 0.0
Since it contains 8 to 0.15% and the remainder is Fe and inevitable impurities, its strength, toughness, and corrosion resistance are improved compared to conventional steel types. Therefore, the stainless steel of the present invention has great industrial value as a variety of structural members used in seawater (for example, pumps, shafts, valves) and structural members for chemical plants.
Claims (1)
Ｍｎ：３．０％以下、Ｃｕ：０．５〜３．０％、Ｎｉ：
４．０％〜７．０％、Ｃｒ：８．０〜１５．０％、Ｍｏ
：０．５〜４．０％、Ｖ：０．１〜２．０％、Ｃｏ：３
．０〜７．０％、Ａｌ：０．５〜２．０％、Ｎｂ：０．
１〜１．０％、Ｂ：０．００５〜０．１００％、Ｎ：０
．０８〜０．１５％を含有し、残部Ｆｅと不可避的不純
物から成ることを特徴とする高強度・高靭性の耐食性ス
テンレス鋼。In weight%, C: 0.08% or less, Si: 2.0% or less,
Mn: 3.0% or less, Cu: 0.5 to 3.0%, Ni:
4.0% to 7.0%, Cr: 8.0 to 15.0%, Mo
:0.5~4.0%, V:0.1~2.0%, Co:3
．． 0-7.0%, Al: 0.5-2.0%, Nb: 0.
1-1.0%, B: 0.005-0.100%, N: 0
．． A high-strength, high-toughness, corrosion-resistant stainless steel characterized by containing 0.08 to 0.15%, with the balance consisting of Fe and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27566987A JPH01119649A (en) | 1987-11-02 | 1987-11-02 | Corrosion-resisting stainless steel having high strength and high toughness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27566987A JPH01119649A (en) | 1987-11-02 | 1987-11-02 | Corrosion-resisting stainless steel having high strength and high toughness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01119649A true JPH01119649A (en) | 1989-05-11 |
Family
ID=17558698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27566987A Pending JPH01119649A (en) | 1987-11-02 | 1987-11-02 | Corrosion-resisting stainless steel having high strength and high toughness |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01119649A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04193933A (en) * | 1990-11-28 | 1992-07-14 | Hitachi Ltd | High strength martensitic stainless steel having high corrosion resistance, production and use thereof |
| WO1994005824A1 (en) * | 1992-09-04 | 1994-03-17 | Mitsubishi Jukogyo Kabushiki Kaisha | Structural member and process for producing the same |
-
1987
- 1987-11-02 JP JP27566987A patent/JPH01119649A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04193933A (en) * | 1990-11-28 | 1992-07-14 | Hitachi Ltd | High strength martensitic stainless steel having high corrosion resistance, production and use thereof |
| WO1994005824A1 (en) * | 1992-09-04 | 1994-03-17 | Mitsubishi Jukogyo Kabushiki Kaisha | Structural member and process for producing the same |
| US5599408A (en) * | 1992-09-04 | 1997-02-04 | Mitsubishi Jukogyo Kabushiki Kaisha | Method of producing a structural member |
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