Precipitation Hardenable Martensitic Stainless Steel
Abstract
A precipitation hardenable stainless chromium nickel steel is disclosed having the following composition in weight %: C max 0.07 Si max 1.5 Mn 0.2-5 S 0.01-0.4 Cr 10-15 Ni 7-14 Mo 1-6 Cu 1-3 Ti 0.3-2.5 Al 0.2-1.5 N max 0.1 balance Fe and normally occurring impurities.
Claims
exact text as granted — not AI-modified1 : Martensitic stainless steel alloy characterized in having the following composition in weight-%:
C
[[max 0.07]] max 0.07
Si
[[max 1.5]] max 1.5
Mn
[[0.2-5]] 0.2-5
S
[[0.01-0.4]] 0.01-0.4
Cr
10-15
Ni
7-14
Mo
1-6
Cu
1-3
Ti
[[0.3-2.5]] 0.3-2.5
Al
[[0.2-1.5]] 0.2-1.5
N
[[max 0.1]] max 0.1
balance Fe and normally occurring impurities
wherein the alloy comprises titanium sulphides.
2 : Martensitic stainless steel alloy according to claim 2 wherein the alloy is substantially free from manganese sulfides.
3 : Martensitic stainless steel alloy according to claim 1 wherein the content of S is 0.015-0.3%.
4 : Martensitic stainless steel alloy according to claim 1 wherein the content of Ti is at least 0.5%.
5 : Martensitic stainless steel alloy according to claim 4 wherein the content of Ti is max 2%.
6 : Martensitic stainless steel alloy according to claim 1 wherein the content of Mo is 2-5%.
7 : Martensitic stainless steel alloy according to claim 1 wherein the content of Cr is 11.5-13% and the content of Ni is 8-13%.
8 : Martensitic stainless steel alloy according to claim 1 wherein the alloy is precipitation hardened.
9 : Martensitic stainless steel alloy according to claim 1 wherein the alloy is produced by conventional metallurgy techniques.
10 : Martensitic stainless steel alloy according to claim 1 wherein the alloy has an approximate composition of
C
[[max 0.2]] max 0.2
Si
[[max 0.3]] max 0.3
Mn
[[0.5]] 0.5
S
[[0.1]] 0.1
Cr
12
Ni
9
Mo
4
Cu
2
Ti
1
Al
[[0.4]] 0.4
N
[[max 0.1]] max 0.1
balance Fe and normally occurring impurities.
11 : Martensitic stainless steel alloy according to claim 1 wherein the alloy has an approximate composition of
C
[[max 0.2]] max 0.2
Si
[[0.2]] 0.2
Mn
[[2.5]] 2.5
S
[[0.1]] 0.1
Cr
12
Ni
9
Mo
4
Cu
2
Ti
1
Al
[[0.4]] 0.4
N
[[max 0.1]] max 0.1
balance Fe and normally occurring impurities.
12 : Martensitic stainless steel alloy according to claim 10 wherein the alloy is substantially free from manganese sulfides.
13 : Martensitic stainless steel alloy according to claim 11 wherein the alloy is substantially free from manganese sulfides.
14 : Martensitic stainless steel alloy according to claim 2 wherein the content of S is 0.015-0.3%.
15 : Martensitic stainless steel alloy according to claim 2 wherein the content of Ti is at least 0.5%.
16 : Martensitic stainless steel alloy according to claim 15 wherein the content of Ti is max 2%.
17 : Martensitic stainless steel alloy according to claim 3 wherein the content of Ti is at least 0.5%.
18 : Martensitic stainless steel alloy according to claim 17 wherein the content of Ti is max 2%.Join the waitlist — get patent alerts
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