GRADE DESCRIPTIONS

Alloy/UNS Description C max Ni Cr Other AMS ASTM Density
(lb./cu.in.)

Austenitic Grades
201
S20100
Chromium nickel manganese was developed as a satisfactory alternate for Type 301 for many applications. .15 3.5-5.5 16.0-18.0 Mn
P
S
5.5-7.5
.06 max
.03 max
N
Si
.025
1.0 max
  A-412 .28
301
S30100
Chromium nickel steel capable of attaining high tensile strength and ductility by moderate or severe cold working. .15 6.0-8.0 16.0-18.0 Mn
P
2.0 max
.045 max
S
Si
.03 max
1.0 max
5517
5519
A-240
A-177
.29
302
S3020
General purpose chromium nickel stainless steel. Its corrosion resistance is superior to Type 301. It can be cold worked to high tensile strengths but with a slightly lower ductility than Type 301. .15 8.0-10.0 17.0-19.0 Mn
P
2.0 max
.045 max
S
Si
.03 max
.75 max
5516 A-240 .29
304
S30400
Low carbon chromium nickel stainless and heat resisting steel; somewhat superior in corrosion resistance to Type 302. .08 8.0-10.5 18.0-20.0 Mn
P
2.0 max
.045 max
S
Si
.03 max
.75 max
5513 A-240 .29
304L
S30403
Very low carbon chromium nickel steel with general corrosion resistance similar to Type 304 and superior resistance to intergranular corrosion following welding or stress relieving. Recommended in parts fabricated by welding which cannot be subsequently annealed. .03 8.0-12.0 18.0-20.0 Mn
P
2.0 max
.045 max
S
Si
.03 max
.75 max
5511 A-240 .29
305
S30500
High corrosion resistant alloy with very low work hardening rate. Designed for extra deep drawing and spinning. .12 10.0-13.0 17.0-19.0 Mn
P
2.0 max
.045 max
S
Si
.03 max
.75 max
5514 A-240 .29
309
S30900
Highly corrosion resistant chromium nickel grade. Carbon limited to .08 to reduce carbon precipitation during welding. .08 12.0-15.0 22.0-24.0 Mn
P
2.0 max
.045 max
Si
S
.75 max
.03 max
5523 A-167 .29
310
S31000
Similar to Type 309, with higher corrosion and oxidation resistance at elevated temperatures. .08 19.0-22.0 24.0-26.0 Mn
P
2.0 max
.045 max
S
Si
.03 max
1.5 max
5521 A-167 .29
316
S31600
Chromium nickel molybdenum stainless heat resistant steel with superior corrosion resistance to other chromium nickel steels when exposed to many chemical corrodents, pitting resistance and superior creep strength at elevated temperatures. .08 10.0-14.0 16.0-18.0 Mn
P
S
2.0 max
.045 max
.03 max
Si
Mo
.75 max
2.0-3.0
5524 A-240 .29
316L
S31603
Low carbon chromium nickel stainless steel with general corrosion resistance similar to Type 316 but with superior inter-granular corrosion resistance following welding or stress relieving. Recommended for parts fabricated by welding which cannot be subsequently annealed. .03 10.0-14.0 16.0-18.0 Mn
P
S
2.0 max
.045 max
.03 max
Si
Mo
.75 max
2.0-3.0
5507 A-167 .29
T316Ti Similar to type 316L with the addition of titanium to tie up the carbon and stabilize the chemistry. .08 10.0-14.0 16.0-18.0 Mn
P
S
2.0 max
.045 max
.030 max
Si
Ti
 
N
Mo
.75 max
5x (C+N) min
.70 max
.10 max
2.0-3.0
     
317L
S31703
Similar to Type 316L with additional molybdenum to improve corrosion resistance. .03 11.0-15.0 18.0-20.0 Mn
P
S
2.0 max
.045 max
.030 max
Si
Mo
1.0 max
3.0-4.0
  A-167 .29
321
S32100
Chromium nickel steel containing titanium; recommended for parts fabricated by welding which cannot be subsequently annealed and for parts to be used at temperatures between 800oF and 1850oF. .08 9.0-12.0 17.0-19.0 Mn
P
2.0 max
.045 max
S
Si
Ti
.030 max
.75 max
5x (C+N) min
.70 max
5510 A-167 .29
347
S34700
Chromium nickel steel containing columbium and tantalum; recommended for parts fabricated by welding which cannot be subsequently annealed and for parts to be used at temperatures between 800oF and 1850oF. .08 9.0-13.0 17.0-19.0 Mn
P
2.0 max
.045 max
S
Si
Cb+Ta
.03 max
1.0 max
10xC min
5512 A-167 .29

Ferritic Grades
430
S43000
General purpose grade, corrosion resistant, straight chromium grade, non-heat-treatable. .12 0.75 16.0-18.0 Mn
P
S
1.0 max
.040 max
.030 max
Si 1.0 max 5503 A-176 .28
434
S43400
Ferritic grade with improved corrosion resistance over 430 due to the addition of molybdenum. Used mainly for automotive trim and exterior environments. .12 0.75 16.0-18.0 Mn
P
1.0 max
.040 max
S
Si
Mo
.030 max
1.0 max
.75-1.25
    .28
446
S44600
Corrosion and heat resistant steel with maximum chromium. Principally used for manufacture of parts which must resist high temperatures in service without scaling up to 200oF. .20   23.0-27.0 Mn
P
S
1.5 max
.040 max
0.30 max
Si
N
1.0 max
0.25
A-176   .27

Martensitic Grades
410
S41000
General purpose corrosion and heat resistant chromium steel. Good corrosion resistance, fair milling properties; can be heat treated to HRC35/45. .15   11.5-13.5 Mn
P
1.0 max
.040 max
S
Si
.010 max
1.0 max
5504 A-176 .28
420
S42000
Chromium steel capable of hardening to a maximum of approximately HRC54 max. .15   12.0-14.0 Mn
P
1.0 max
.04 max
S
Si
.03 max
1.0 max
5506 A-176 .28
4021
EN10088
Chromium steel capable of hardening to a maximum HRC 49. .16-.25   12.0-14.0 Mn
P
1.5 max
.040 max
S
Si
.015 max
1.0 max
    .28
4028
EN10088
Chromium steel capable of hardening to a maximum HRC 54. .26-.35   12.0-14.0 Mn
P
1.5 max
.040 max
S
Si
.015 max
1.0 max
    .28
4034
EN10088
Chromium steel capable of hardening to a maximum HRC 56. .43-.50   12.5-14.5 Mn
P
1.0 max
.040 max
S
Si
.015 max
1.0 max
    .28
4110
SEW400
Chromium steel capable of hardening to a maximum HRC 57. .48-.60   13.0-15.0 Mn
P
S
1.0 max
.040 max
.015 max
Mo
Si
V
.5-.8max
1.0 max
.15 max
    .28
440A
S44002
High carbon grade, high chromium; capable of being heat treated to a hardness range of HRC61/63. .60-.75   16.0-18.0 Mn
P
S
1.0 max
.040 max
.030 max
Si
Mo
1.0 max
.75 max
  A-176 .28

Precipitation Hardening Grades
17-7PH® 3
SS17700
Chromium nickel stainless steel with good workability, easy hardening, high strength and excellent mechanical properties at elevated temperatures. Can be heat treated at relatively low temperatures for high strength properties. .09 6.5-7.75 16.0-18.0 Al
Si
P
.75-1.5
1.0 max
.040 max
S .030 max 5528 A-693 .28
17-4PH3
S17400
Precipitation hardening stainless steel with high strength and good corrosion resistance to 600oF. Used in aerospace, chemical, petrochemical, paper and metalworking. .07 3.0-5.0 15.0-17.5 Mn
P
S
1.0 max
.04 max
.030 max
Si
Cu
1.0 max
3.0-5.0
5604 A-693
Type 630
.28
PH15-7M0® 3
S15700
Similar to 17-7PH™ 3 alloy with molybdenum added for higher strength with heat treatment. .09 6.50-7.75 14.0-16.0 Mn
Si
P
1.0 max
1.0 max
0.4 max
S
Mo
Al
.04 max
2.0-3.0
.75-1.50
5520 A-693 .28
A286™ 4
S66286
Iron, nickel and chromium alloy designed for service up to 1300oF where high strength and corrosion resistance are required. .08 24.0-27.0 13.5-16.0 Mn
Si
P
Al
2.0 max
1.0 max
.04 max
0.35 max
Ti
Mo
V
S
1.9-2.35
1.0-1.5
1.5
0.30 max
5525   .29
AM350™ 4
S35000
Similar to 17-7PH™ 3 alloy and PH15-7Mo™ 3 alloy with slightly higher elevated temperature capability. .07-.11 4.0-5.0 16.0-17.0 Mn
Si
P
.50-1.25
.50 max
.04 max
S
Mo
N
0.30 max
2.5-3.25
.07-.13
5548 A-693 .29

1) Trademark of Carpenter Technology Corporation
2) Carpenter 20CB-3LR® is a trademark of Hoechst Celanese Corporation.
3) Trademark of Armco, Inc.
4) Trademark of Allegheny Ludlum Corporation.


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