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Alloy/ UNS
DESCRIPTION
C MAX
Ni
Cr
OTHER
AMS
ASTM
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 2.0MAX
S .03MAX
P .045MAX
Si 1.0MAX
5517
5519
5518
A-167
A-177
302 S30200
General purpose chromium nickel stainless steel. Its corrosion resistance is superior to that of Type 301.It can be cold worked to high tensile strengths but withSlightly lower ductility than Type 301.
.15
8.0-
10.0
17.0-
19.0
Mn 2.0MAX
S .03MAX
P .045MAX
Si 1.0MAX
5516
A-167
304 S30400
Low carbon chromium nickel stainless and heat resistingSteel somewhat superior to Type 302 in corrosion resistance.
.08
8.0-
10.5
18.0-
20.0
Mn 2.0MAX
S .03MAX
P .045MAX
Si 1.0MAX
5513
A-167
304L S30403
Very low carbon chromium nickel steel with generalcorrosion resistance similar to Type 304 but with superior resistance to intergranular corrosion following weldingor stress relieving.It is recommended for use in parts which are fabricated by welding and which cannot be subsequently annealed.
.03
8.0-
12.0
18.0-
20.0

Mn 2.0MAX
S .03MAX
P .045MAX
Si 1.0MAX
5511
A-167
309 S30900
High corrosion-resistant, chromium nickel grade with carbon limited to .08 to reduce carbon precipitationduring welding.
.08
12.0-
15.0
22.0-
24.0
Mn 2.0MAX
S 1.0MAX
P .045MAX
Si .03MAX
5523
A-167
310 S31000
Similar to 309 with higher resistance to corrosion and oxidation at elevated temperatures
.25
19.0-
22.0
24.0-
26.0
Mn 2.0MAX
S .03MAX
P .045MAX
Si 1.5MAX
5521
A-167
316 S31600
Chromium nickel stainless and heat resisting steel with Superior corrosion resistance to other chromium nickel steels when exposed to many types of chemical corrodents; superior creep strength at elevated temperatures.
.08
10.0-
14.0
16.0-
18.0
Mn 2.0MAX
Si 1.0MAX
P .045MAX
Mo 2.0-3.0
S .03MAX
5524
A-167
316L S31603
Low carbon chromium nickel stainless steel with general corrosion resistance similar to Type 316 but with superior resistance to intergranular corrosion following welding or relieving. It is recommended for use in parts which are fabricated by welding and cannot be subsequently annealed.
.03

10.0-
14.0

16.0-
18.0
Mn 2.0MAX
Si 1.0MAX
P .045MAX Mo 2.0-3.0
S .03MAX
5507
A-167
317L S31703
Similar to 316L but with additional molybdenum to improve corrosion resistance.
.03
11.0-
15.0
18.0-
20.0
Mn 2.0MAX
Si 1.0MAX
P .045MAX
Mo 3.0-4.0
S .03MAX
A-167
321 S32100
Chromium nickel steel containing titanium. Recommended for parts fabricated by welding which cannot be subsequently annealed. Also recommended for parts to be used at temperatures Between 800°F; and 1850°F.
.08
9.0-
12.0
17.0-
19.0
Mn 2.0MAX
S .03MAX
P .045MAX
Si 1.0MAX
Ti 5xC MIN
5510
A-167
347 S34700
Chromium nickel steel containing columbium and tantalum which is recommended for parts fabricated by welding which cannot be subsequently annealed. Also recommended for parts to be used at temperatures between 800°F; and 1850°F.
.08
9.0-
13.0
17.0-
19.0
Mn 2.0MAX
S .03MAX
P .045MAX
Si 1.0MAX
Cb + Ta
10xC MIN
5512
A-167
CARPENTER 20
CB33, 10
N08020
A highly corrosion-resistant alloy used in the chemical industry for applications where corrosion resistance is extremely critical, superior to the general run of 300 type stainless.
.06
32.5-
35.0
19.0-
21.0
Cu 3-4 8xC
Cb+Ta 1
Mo 2-3
Fe bal.
B-463
430S 43000
General purpose grade, corrosion-resistant, straight chromium grade, non-heat-treatable.
.12

16.0-
18.0

Mn 1.0MAX
S .03MAX
P .04MAX
Si 1.0MAX
5503
A-176
446S 44600
Corrosion and heat resisting chromium steel with the maximum amount of chromium. Used principally for the manufacture of parts capable of resisting destructive scaling in temperatures up to 200°F.
.20
23.0-
27.0
Mn 1.5MAX
Si 1.0MAX
P .04MAX
N .025MAX
S 0.3MAX
A-176
410S 41000
General purpose corrosion and heat resisting chromium steel.Good corrosion resistance and fair machining properties.Can be treated to RC35/45.
.15
11.5-
13.5
Mn 1.0MAX
S 1.0MAX
P .04MAX
Si 1.0MAX
5504
420S 42000
Chromium steel capable of hardening to a maximum of approximately RC53/58.
.15
min.
12.0-
14.0
Mn 1.0MAX
S .03MAX
P .04MAX
Si 1.0MAX
5506
A-176
17-7PHTM4
S17700
A chromium nickel stainless steel with characteristics of good workability, easy hardening, high strength,and excellent mechanical properties at elevated temp., can be heat treated at relatively low temperature for high strength properties.
.09
6.5-
7.75
16-
18.0
Al .75-1.5
S .03MAX
Si 1.0MAX
P .04MAX
5528
A-693
17-4PHTM4
S17400
Precipitation hardening stainless steel with high strength and good corrosion resistance to 600°F. Used in aerospace, chemical, petrochemical, paper andmetalworking industries.
.07
3.0-
5.0
15.0-
17.5
Mn 1.0MAX
Si 1.0MAX
P .04MAX
Cu 3.0-5.0
5604
A-693
(Type
630)
PH15-7MoTM4
S15700
Similar to 17-7PHTM4 alloy, but with molybdenum addedfor higher strength with heat treatment.
.09
6.50-
7.75
14.0-
16.0
Mn 1.0MAX
S .04MAX
Si 1.0MAX
Mo 2.0-3.0
P .04MAX
Al .75-1.50
5520
A-693
A286TM4
S66286
An iron, nickel, chromium alloy designed for service up to 1300°F where high strength and corrosion resistance are required.
.08
24.0-
27.0
13.5-
16.0
Mn 2.0MAX
Ti 1.9-2.35
Si 1.0MAX
Mo 1.0-1.5
P .040MAX
V 0.10-0.50
Al .035
S .030MAX
525
AM 350TM8
S35000
ar to 17-7PHTM4 alloy and PH15-7MoTM4 alloy, but with slightly higher elevated temperature capability.
.07-
.11
4.0-
5.0
16.0-
17.0
Mn .50-1.25
S .03MAX
Si .50MAX
Mo 2.5-3.25
P .04MAX
N .07-.13
548
A-693