ASTM standard ASTM A297, ASTM A351, ASTM A743, ASTM A744 and ASTM A890 specify castings for corrosion and heat-resisting service. The grade designations used in these standard are those originally developed by the ACI, the Alloy Casting Institute. (Now the Steel Founder's Society of America). These standards include the 'C' grades for aqueous (wet) corrosion service at temperatures up to 650 C and the 'H' grades for high temperature service at temperature generally over 600 C. The range of steels listed in this article includes martensiticferriticprecipitation hardeningaustenitic and austenitic-ferritic (duplex stainless steel) grades and some nickel based alloys. Where appropriate, the nearest or related wrought grade is shown in the table.

Aqueous (wet) corrosion grades

DesignationChemical composition % by mass (max unless otherwise stated)
ACI NoUNS NoCSiMnPSCrMoNiNCuNbOthersGrade
CA6N-0.061.00.500.020.0210.5
/12.5
-6.0
/8.0
-----
CA6
NM
J91
540
0.061.01.00.040.0411.5
/14.0
0.4-1.03.5
/4.5
-----
410J91
150
0.151.51.00.040.0411.5
/14.0
0.51.0----410
CA1
5M
J91
151
0.050.651.000.0400.04011.5
/14.0
0.15
/1.0
1.0-----
CA28
MWV
J91
422
0.20
/0.28
1.00.50
/1.00
0.0300.03011.0
/12.5
0.90
/1.25
0.50
/1.00
---W 0.90
/1.25;
V 0.20
/0.30
-
420J91
153
0.20
/0.40
1.501.000.040.0411.5
/14.0
0.51.0----420
CA40FJ91
154
0.20
/0.40
1.501.000.040.20
/0.40
11.5
/14.0
0.51.0-----
CB6J91
804
0.061.001.000.040.0315.5
/17.5
0.53.5
/5.5
-----
CB30J91
803
0.061.501.000.040.0418.0
/21.0
-2.000.90
/1.20
----
CB7Cu-1J92
180
0.071.000.700.0350.0315.50
/17.70
-3.60
/4.60
0.052.50
/3.20
0.15
/0.35
-17/4PH
CB7
Cu-2
J92
110
0.071.000.700.0350.0314.0
/15.50
-4.50
/5.50
0.052.50
/3.20
0.15
/0.35
-15/5PH
CC50J92
615
0.501.501.000.040.0426.0
/30.0
-4.00-----
CD3M
CuN
J93
373
0.0301.101.200.0300.03024.0
/26.7
2.9
/3.8
5.6
/6.7
0.22
/0.33
1.40
/1.90
--1C
CD3
MN
J92
205
0.031.001.500.040.02021.0
/23.5
2.5
/3.5
4.5
/6.5
0.10
/0.30
1.00--2205
(4A)
CD3M
WCuN
J93
380
0.031.001.000.0300.02524.0
/26.0
3.0
/4.0
6.5
/8.5
0.20
/0.30
0.5/1.0-W
0.5
/1.0
Zeron
100
CD4
MCu
J93
370
0.041.001.000.040.0424.5
/26.5
1.75
/2.25
4.75
/6.00
-2.75
/3.25
--1A
CD4M
CuN
J93
372
0.041.01.00.040.0424.5
/26.5
1.7
/2.3
4.7
/6.0
0.10
/0.25
2.7
/3.3
--1B
CD6
MN
J93
371
0.061.001.000.0400.04024.0
/27.0
1.75
/2.5
4.0
/6.0
0.15
/0.25
---3A
CE2
0N
J92
802
0.201.501.500.0400.04023.0
/26.0
0.508.0
/11.0
0.08
/0.20
----
CE3
MN
J93
404
0.031.001.500.040.0424.0
/26.0
4.0
/5.0
6.0
/8.0
0.10
/0.30
---Alloy
958
CE30J93
423
0.302.001.500.040.0426.0
/30.0
-8.0
/11.0
-----
CE8
MN
J93
345
0.081.501.000.0400.04022.5
/25.5
3.0
/4.5
8.0
/11.0
0.10
/0.30
---Escoloy
CF3J92
500
0.032.001.500.040.0417.0
/21.0
-8.0
/12.0
----304L
CF8J92
600
0.082.001.500.040.0418.0
/21.0
-8.0
/11.0
----304
CF8CJ92
710
0.082.001.500.040.0418.0
/21.0
-9.0
/12.0
--8x C
/1.0
-347
CF20J92
602
0.202.001.500.040.0418.0
/21.0
-8.00
/11.0
----302
CF3MJ92
800
0.031.501.500.040.0417.0
/21.0
2.0
/3.0
9.0
/13.0
----316L
CF3
MN
J92
804
0.031.501.500.0400.04017.0
/22.0
2.0
/3.0
9.0
/13.0
0.10
/0.20
---316LN
CF8MJ92
900
0.082.001.500.040.0418.0
/21.0
2.0
/3.0
9.0
/12.0
----316
CF8CJ92
710
0.082.001.500.040.0418.0
/21.0
-9.0
/12.0
-----
CF10J92
950
0.04
/0.10
2.001.500.0400.04018.0
/21.0
0.508.0
/11.0
-----
CF1
0M
J92
901
0.04
/0.10
1.501.500.0400.04018.0
/21.0
2.0
/3.0
9.0
/12.0
-----
CF1
0MC
-0.101.501.500.0400.04015.0
/18.0
1.75
/2.25
13.0
/16.0
--10xC
/1.20
--
CF10
S
MnN
J92
972
0.103.50
/4.50
7.00
/9.00
0.0600.03016.0
/18.0
-8.0
/9.0
0.08
/0.18
----
CF16FJ92
701
0.162.001.500.170.0418.0
/21.0
1.509.0
/12.0
---Se 0.20
/0.35
303Se
CF1
6FA
-0.162.001.500.040.20
/0.40
18.0
/21.0
0.40
/0.80
9.0
/12.0
-----
CG6
MMN
J93
790
0.061.004.00
/6.00
0.0400.03020.50
/23.50
1.50
/3.00
11.5
/13.5
0.20
/0.40
-0.10
/0.30
V 0.10
/0.30
-
CG3MJ92
999
0.031.501.500.040.0418.0
/21.0
3.0
/4.0
9.0
/13.0
----317L
CG8MJ93
000
0.081.501.500.040.0418.0
/21.0
3.0
/4.0
9.0
/13.0
----317
CG12J93
001
0.122.001.500.040.0420.0
/23.0
-10.0
/13.0
-----
CH8J93
400
0.081.501.500.0400.04022.0
/26.0
0.5012.0
/15.0
-----
CH10J93
401
0.102.001.500.040.0422.0
/26.0
-12.0
/15.0
-----
CH20J93
402
0.202.001.500.042.0022.0
/26.0
-12.0
/15.0
-----
CK20J94
202
0.202.002.000.040.0423.0
/27.0
-15.0
/19.0
-----
CK3M
CuN
J93
254
0.0251.001.200.0450.01019.5
/20.5
6.0
/7.0
17.5
/19.5
0.18
/0.24
0.50
/1.00
--254SMO
CK3
5MN
-0.0351.002.000.0350.02022.0
/24.0
6.0
/6.8
20.0
/22.0
0.21
/0.32
0.40---
CN3MJ94
652
0.031.02.00.030.0320.0
/22.0
4.5
/5.5
23.0
/27.0
-----
CN3
MN
J94
651
0.031.02.00.0400.01020.0
/22.0
6.0
/7.0
23.5
/25.5
0.18
/0.26
0.75--AL-6XN
CN7MN08
007
0.071.501.500.040.0419.0
/22.0
2.0
/3.0
27.5
/30.5
-3.0
/4.0
---
CN7
MS
J94
650
0.071.501.500.0400.04019.0
/22.0
2.0
/3.0
27.5
/30.5
-1.5
/2.0
---
CT1
5C
N08
151
0.05
/0.15
0.50
/1.50
0.15
/1.50
0.030.0319.0
/21.0
-31.0
/34.0
--0.50
/1.50
--

High temperature grades

DesignationChemical composition % by mass (max unless otherwise stated)
ACI NoUNS NoCSiMnPSCrMoNiNCuNbOthersGrade
HC-0.502.001.000.040.0426.0/30.00.504.0/7.0-----
HD-0.502.001.500.040.0426.0/30.00.504.00-----
HE-0.20/0.502.002.000.040.0426.0/30.00.508.0/11.0-----
HF-0.20/0.402.002.000.040.04`18.0/23.00.508.0/12.0-0.50--309
HH-0.20/0.502.002.000.040.0424.0/28.00.5011.0/14.0-----
HI-0.20/0.502.002.000.040.0426.0/30.00.5014.0/18.0-----
HK-0.20/0.602.002.000.040.0424.0/28.00.5018.0/22.0----310
HK30J942030.25/0.351.751.500.0400.04023.0/27.00.5019.0/22.0-----
HK40J942040.35/0.451.751.500.0400.04023.0/27.00.5019.0/22.0-----
HL-0.20/0.602.002.000.040.0428.0/32.00.5018.0/22.0-----
HN-0.20/0.502.002.000.040.0419.0/23.00.5023.0/27.0-----
HP-0.35/0.752.502.000.040.0424/280.5033/37-----
HT-0.35/0.752.502.000.40.415.0/19.00.5033.0/37.0-----
HT30N080300.25/0.352.502.000.0400.04013.0/17.00.5033.0/37.0-----
HU-0.35/0.752.502.000.40.417.0/21.00.5037.0/41.0-----
HW-0.35/0.752.502.000.40.410.0/14.00.5058.0/62.0-----
HX-0.35/0.752.502.000.40.415.0/19.00.5064.0/68.0-----

Related References:
1. Chemical Composition of AISI and UNS Austenitic Stainless Steel
2. Chemical Composition of ACI Heat Resisting Stainless Steel
3. Chemical Composition of AISI and UNS Ferritic Stainless Steel
4. Chemical Composition of AISI and UNS Duplex Stainless Steel
5. Chemical Composition of AISI and UNS Heat Resisting Stainless Steel
6. Chemical Composition of AISI and UNS Martensitic and Precipitation Hardening