Stainless Steels
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RA 253 MA®
An advanced micro-alloyed austenitic heat resistant alloy. High creep-rupture strength and outstanding oxidation resistance through 2000°F.
Cr Ni Si C Mn P S N Ce Fe MIN 20.00 10.00 1.40 0.05 -- -- -- 0.14 0.03 Balance MAX 22.00 12.00 2.00 0.10 0.80 0.04 0.03 0.20 0.08 -
309
Austenitic, oxidation resistant to 1900°F, moderate strength. Useful in reducing sulfidizing atmospheres.
Cr Ni C P S Mn Fe MIN 22.0 12.0 - - - - - MAX 24.0 15.0 0.08 0.045 0.03 2.0 Balance -
310
Austenitic heat resistant grade with higher chromium and nickel for oxidation resistance beyond 2000°F. Good sulfidation and hot corrosion resistance.
Cr Ni C Si Mn P S Mo Cu Fe MIN 24.0 19.0 - - - - - - - - MAX 26.0 22.0 0.08 0.75* 2.0 0.045 0.03 0.75 0.5 Balance * ASTM specification 1.50 max Si.
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321
A titanium stabilized austenitic stainless commonly used for service in the 1000- 1600°F range.
Cr Ni Mo Cu Ti C Mn Si P S N Fe MIN 17.0 9.0 - - 5x(C+N) - - 0.25 - - - - MAX 19.0 12.0 0.75 0.75 0.7 0.08 2.0 1.0 0.04 0.03 0.1 Balance -
347
A columbium stabilized austenitic stainless useful up to 1600°F.
Cr Ni Cb + Ta C Si Mn P S Fe MIN 17.0 9.0 Cb 10xc
(Cb 8xC)0.04 - - - - MAX 19.0 13.0 1.0 0.08 0.75 2.0 0.045 0.03 Balance -
17-4
Age-hardening martensitic stainless. Good strength and corrosion resistance. Simple heat treatment.
Ni Cr Mo Mn Cu Si C Cb+Ta S P Fe MIN 3.0 15.0 - - 3.0 - - 5 x C - - - MAX 5.0 17.5 0.05 1.0 4.0 1.0 0.07 0.45 0.03* 0.04* Balance *0.025 max
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17-4 H1150
Ni Cr Mo Mn Cu Si C Cb+Ta S P Fe MIN 3.0 15.0 - - 3.0 - - 5 x C - - - MAX 5.0 17.5 0.05 1.0 4.0 1.0 0.07 0.45 0.03* 0.04* Balance *0.025 max, AMS 5622
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17-4 HH1150
Ni Cr Mo Mn Cu Si C Cb+Ta S P Fe MIN 3.0 15.0 - - 3.0 - - 5 x C - - - MAX 5.0 17.5 0.05 1.0 4.0 1.0 0.07 0.45 0.03* 0.04* Balance *0.025 max, AMS 5622
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A-286
Precipitation hardenable iron base alloy for continuous use from -320 to 1000°F. Aqueous corrosion resistance similar to 316L stainless. Used for jet engine components, high temperature fasteners and springs. Also used for non-magnetic cryogenic equipment.
Cr Ni Mo Co Va Al Ti B C Fe Mn Si Ph S MIN 13.5 24.0 1.0 - 0.1 - 1.9 0.003 - - - - - - MAX 16.0 27.0 1.5 1.0 0.5 0.35 2.35 0.01 0.08 Balance 2.0 1.0 0.025 0.025 -
304 / 304H
18-8 stainless with elevated carbon and coarser grain structure to increase high temperature strength. Useful up to 1500°F.
Cr Ni C Mn Si P S Fe MIN 18.0 8.0 0.04 - - - - - MAX 20.0 10.5 0.10 2.0 0.75 0.04 0.03 Balance -
303 HST
303 HST is a version of 303 which through controlled production offers more consistent machinability than standard 303.
Ni Cr Mn Si C S P Fe MIN 8.0 17.0 - - - 0.15 - - MAX 10.0 19.0 2.0 1.0 0.15 - 0.2 Balance -
304 / 304L
Austenitic stainless, low carbon for as-welded corrosion resistance.
Ni Cr Mn Si C S P N Fe MIN 8.0 18.0 - - - - - - - MAX 10.5 20.0 2.0 0.75 0.03 0.03 0.045 0.10 Balance -
316 / 316L
Molybdenum alloyed austenitic stainless. Most popular chemical process grade.
Ni Cr Mo Mn Si C S P N Fe MIN 10.0 16.0 2.0 - - - - - - - MAX 14.0 18.0 3.0 2.0 0.75 0.03 0.03 0.045 0.1 Balance -
410
Hardenable 12 chromium martensitic.
Cr Mn Ni C Si P S Fe MIN 11.5 - - 0.08 - - - - MAX 13.5 1.0 0.75 0.15 1.0 0.04 0.03 Balance -
410S
Lower carbon 12 chromium martensitic, weldable.
Cr C N Mn Si Ph S Fe MIN 11.5 - - - - - - - MAX 13.5 0.08 0.6 0.08 1.0 0.04 0.03 Balance -
446
High chromium ferritic alloy with excellent oxidation and sulfidation resistance. Low strength.
Cr C N Mn Si Ph S Fe MIN 23.0 - - - - - - - MAX 27.0 0.15 0.25 1.5 1.0 0.04 0.03 Balance -
455
Cr Ni Cu Mo Mn Ti Si Cb + Ta S P C Fe MIN 11.0 7.50 1.50 - - 0.80 - 0.10 - - - - MAX 12.5 9.50 2.50 0.50 0.50 1.40 0.50 0.50 0.30 0.04 0.05 balance -
317L
An austenitic stainless steel with increased molybdenum content over 316L for improved pitting resistance.
Ni Cr Mo Mn Si C N S P Fe MIN 11.0 18.0 3.0 - - - - - - - MAX 15.0 20.0 4.0 2.0 0.75 0.03 0.1 0.03 0.045 Balance -
303
Free machining 18-8 stainless.
Cr Ni C Mn P S Si Fe MIN 17.0 8.0 - - - 0.3 - - MAX 19.0 10.0 0.15 2.0 0.2 - 1.0 Balance RAM 303 contains 0.30% minimum sulfur for enhanced machinability, substantially higher than the 0.15% minimum required by ASTM
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Prodec® 303
Rolled Alloys Machining grade of Prodec® 303 stainless.
Cr Ni C Mn P S Si Fe MIN 17.0 8.0 - - - 0.3 - - MAX 19.0 10.0 0.15 2.0 0.2 - 1.0 Balance Prodec® 303 contains 0.30% minimum sulfur for enhanced machinability, substantially higher than the 0.15% minimum required by ASTM
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Prodec® 304/304L
Rolled Alloys Machining grade of Prodec® 304/L stainless.
Cr Ni C Mn P S Si Fe MIN 18.0 8.0 - - - 0.015 - - MAX 20.0 11.0 0.03 2.0 0.045 0.03 0.75 Balance -
Prodec® 316/316L
Rolled Alloys Machining grade of Prodec® 316/L stainless.
Cr Ni C Mn P S Si Mo N Fe MIN 16.0 10.0 - - - 0.015 - 2.0 - - MAX 18.0 14.0 0.03 2.0 0.04 0.03 0.75 3.0 0.1 Balance -
15-5
Age hardening martensitic stainless.
Ni Cr Mn Cu Si Cb+Ta C P S Fe MIN 3.5 14.0 - 2.5 - 0.15 - - - - MAX 5.5 15.5 1.0 4.5 1.0 0.45 0.07 0.04 0.03 Balance -
13-8
Rolled Alloys offers 13-8 round bar in stock and available online. Martensitic PH stainless with high strength, hardness, superior toughness and good corrosion resistance.
Ni Cr Mo C P S Si Mn N Al Fe MIN 7.5 12.25 2.0 - - - - - - 0.90 - MAX 8.5 13.25 2.5 0.05 0.01 0.008 0.1 0.2 0.1 1.35 Balance -
Nitronic® 50
High strength and good corrosion resistance. Nearly 2X strength of 304 & 316 with better corrosion resistance than 317L.
Ni Cr Mo Mn Si C N S P Cb V Fe MIN 11.5 20.5 1.5 4.0 - - 0.2 - - 0.1 0.1 - MAX 13.5 23.5 3.0 6.0 1.0 0.06 0.4 0.03 0.045 0.3 0.3 Balance -
Nitronic® 60
Excellent galling resistance at high temperatures. Used for fasteners and pins.
Ni Cr Mn Si C N S P Fe MIN 8.0 16.0 7.0 3.5 - 0.08 - - - MAX 9.0 18.0 9.0 4.5 0.10 0.18 0.03 0.06 Balance
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RA 253 MA®
An advanced micro-alloyed austenitic heat resistant alloy. High creep-rupture strength and outstanding oxidation resistance through 2000°F.
Cr Ni Si C Mn P S N Ce Fe MIN 20.00 10.00 1.40 0.05 -- -- -- 0.14 0.03 Balance MAX 22.00 12.00 2.00 0.10 0.80 0.04 0.03 0.20 0.08 -
309
Austenitic, oxidation resistant to 1900°F, moderate strength. Useful in reducing sulfidizing atmospheres.
Cr Ni C P S Mn Fe MIN 22.0 12.0 - - - - - MAX 24.0 15.0 0.08 0.045 0.03 2.0 Balance -
310
Austenitic heat resistant grade with higher chromium and nickel for oxidation resistance beyond 2000°F. Good sulfidation and hot corrosion resistance.
Cr Ni C Si Mn P S Mo Cu Fe MIN 24.0 19.0 - - - - - - - - MAX 26.0 22.0 0.08 0.75* 2.0 0.045 0.03 0.75 0.5 Balance * ASTM specification 1.50 max Si.
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321
A titanium stabilized austenitic stainless commonly used for service in the 1000- 1600°F range.
Cr Ni Mo Cu Ti C Mn Si P S N Fe MIN 17.0 9.0 - - 5x(C+N) - - 0.25 - - - - MAX 19.0 12.0 0.75 0.75 0.7 0.08 2.0 1.0 0.04 0.03 0.1 Balance -
347
A columbium stabilized austenitic stainless useful up to 1600°F.
Cr Ni Cb + Ta C Si Mn P S Fe MIN 17.0 9.0 Cb 10xc
(Cb 8xC)0.04 - - - - MAX 19.0 13.0 1.0 0.08 0.75 2.0 0.045 0.03 Balance -
17-4
Age-hardening martensitic stainless. Good strength and corrosion resistance. Simple heat treatment.
Ni Cr Mo Mn Cu Si C Cb+Ta S P Fe MIN 3.0 15.0 - - 3.0 - - 5 x C - - - MAX 5.0 17.5 0.05 1.0 4.0 1.0 0.07 0.45 0.03* 0.04* Balance *0.025 max
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17-4 H1150
Ni Cr Mo Mn Cu Si C Cb+Ta S P Fe MIN 3.0 15.0 - - 3.0 - - 5 x C - - - MAX 5.0 17.5 0.05 1.0 4.0 1.0 0.07 0.45 0.03* 0.04* Balance *0.025 max, AMS 5622
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17-4 HH1150
Ni Cr Mo Mn Cu Si C Cb+Ta S P Fe MIN 3.0 15.0 - - 3.0 - - 5 x C - - - MAX 5.0 17.5 0.05 1.0 4.0 1.0 0.07 0.45 0.03* 0.04* Balance *0.025 max, AMS 5622
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A-286
Precipitation hardenable iron base alloy for continuous use from -320 to 1000°F. Aqueous corrosion resistance similar to 316L stainless. Used for jet engine components, high temperature fasteners and springs. Also used for non-magnetic cryogenic equipment.
Cr Ni Mo Co Va Al Ti B C Fe Mn Si Ph S MIN 13.5 24.0 1.0 - 0.1 - 1.9 0.003 - - - - - - MAX 16.0 27.0 1.5 1.0 0.5 0.35 2.35 0.01 0.08 Balance 2.0 1.0 0.025 0.025 -
304 / 304H
18-8 stainless with elevated carbon and coarser grain structure to increase high temperature strength. Useful up to 1500°F.
Cr Ni C Mn Si P S Fe MIN 18.0 8.0 0.04 - - - - - MAX 20.0 10.5 0.10 2.0 0.75 0.04 0.03 Balance -
303 HST
303 HST is a version of 303 which through controlled production offers more consistent machinability than standard 303.
Ni Cr Mn Si C S P Fe MIN 8.0 17.0 - - - 0.15 - - MAX 10.0 19.0 2.0 1.0 0.15 - 0.2 Balance -
304 / 304L
Austenitic stainless, low carbon for as-welded corrosion resistance.
Ni Cr Mn Si C S P N Fe MIN 8.0 18.0 - - - - - - - MAX 10.5 20.0 2.0 0.75 0.03 0.03 0.045 0.10 Balance -
316 / 316L
Molybdenum alloyed austenitic stainless. Most popular chemical process grade.
Ni Cr Mo Mn Si C S P N Fe MIN 10.0 16.0 2.0 - - - - - - - MAX 14.0 18.0 3.0 2.0 0.75 0.03 0.03 0.045 0.1 Balance -
410
Hardenable 12 chromium martensitic.
Cr Mn Ni C Si P S Fe MIN 11.5 - - 0.08 - - - - MAX 13.5 1.0 0.75 0.15 1.0 0.04 0.03 Balance -
410S
Lower carbon 12 chromium martensitic, weldable.
Cr C N Mn Si Ph S Fe MIN 11.5 - - - - - - - MAX 13.5 0.08 0.6 0.08 1.0 0.04 0.03 Balance -
446
High chromium ferritic alloy with excellent oxidation and sulfidation resistance. Low strength.
Cr C N Mn Si Ph S Fe MIN 23.0 - - - - - - - MAX 27.0 0.15 0.25 1.5 1.0 0.04 0.03 Balance -
455
Cr Ni Cu Mo Mn Ti Si Cb + Ta S P C Fe MIN 11.0 7.50 1.50 - - 0.80 - 0.10 - - - - MAX 12.5 9.50 2.50 0.50 0.50 1.40 0.50 0.50 0.30 0.04 0.05 balance -
317L
An austenitic stainless steel with increased molybdenum content over 316L for improved pitting resistance.
Ni Cr Mo Mn Si C N S P Fe MIN 11.0 18.0 3.0 - - - - - - - MAX 15.0 20.0 4.0 2.0 0.75 0.03 0.1 0.03 0.045 Balance -
303
Free machining 18-8 stainless.
Cr Ni C Mn P S Si Fe MIN 17.0 8.0 - - - 0.3 - - MAX 19.0 10.0 0.15 2.0 0.2 - 1.0 Balance RAM 303 contains 0.30% minimum sulfur for enhanced machinability, substantially higher than the 0.15% minimum required by ASTM
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Prodec® 303
Rolled Alloys Machining grade of Prodec® 303 stainless.
Cr Ni C Mn P S Si Fe MIN 17.0 8.0 - - - 0.3 - - MAX 19.0 10.0 0.15 2.0 0.2 - 1.0 Balance Prodec® 303 contains 0.30% minimum sulfur for enhanced machinability, substantially higher than the 0.15% minimum required by ASTM
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Prodec® 304/304L
Rolled Alloys Machining grade of Prodec® 304/L stainless.
Cr Ni C Mn P S Si Fe MIN 18.0 8.0 - - - 0.015 - - MAX 20.0 11.0 0.03 2.0 0.045 0.03 0.75 Balance -
Prodec® 316/316L
Rolled Alloys Machining grade of Prodec® 316/L stainless.
Cr Ni C Mn P S Si Mo N Fe MIN 16.0 10.0 - - - 0.015 - 2.0 - - MAX 18.0 14.0 0.03 2.0 0.04 0.03 0.75 3.0 0.1 Balance -
15-5
Age hardening martensitic stainless.
Ni Cr Mn Cu Si Cb+Ta C P S Fe MIN 3.5 14.0 - 2.5 - 0.15 - - - - MAX 5.5 15.5 1.0 4.5 1.0 0.45 0.07 0.04 0.03 Balance -
13-8
Rolled Alloys offers 13-8 round bar in stock and available online. Martensitic PH stainless with high strength, hardness, superior toughness and good corrosion resistance.
Ni Cr Mo C P S Si Mn N Al Fe MIN 7.5 12.25 2.0 - - - - - - 0.90 - MAX 8.5 13.25 2.5 0.05 0.01 0.008 0.1 0.2 0.1 1.35 Balance -
Nitronic® 50
High strength and good corrosion resistance. Nearly 2X strength of 304 & 316 with better corrosion resistance than 317L.
Ni Cr Mo Mn Si C N S P Cb V Fe MIN 11.5 20.5 1.5 4.0 - - 0.2 - - 0.1 0.1 - MAX 13.5 23.5 3.0 6.0 1.0 0.06 0.4 0.03 0.045 0.3 0.3 Balance -
Nitronic® 60
Excellent galling resistance at high temperatures. Used for fasteners and pins.
Ni Cr Mn Si C N S P Fe MIN 8.0 16.0 7.0 3.5 - 0.08 - - - MAX 9.0 18.0 9.0 4.5 0.10 0.18 0.03 0.06 Balance