| Sr.No. |
Closest Equivalent Alloy |
UNS |
DIN 17445 |
ASTM A351/A743/ A890 |
Micro-Structure |
Heat Treatment |
Temp C |
T.S. kg/mm2 min. |
Y.S. kg/mm2 min. |
Elong-ation min. % |
Applications |
| 1 |
AISI 410 |
J91150 |
1.4008 |
Gr CA-15 |
Martensite |
Hardened & Tempered |
955 |
63.24 |
45.90 |
18 |
Valves and valve trim, pump parts for power plant and refining equipments, sliding or wearing parts like wedges for paper mills. |
| 2 |
AISI420 |
42000 |
1.4021 |
- |
Martensite |
Hardened & Tempered |
980-1030
600-750 |
66.00 |
46.00 |
14 |
Wear resistance applications such as ROT (run over table) rolls in steel plants. |
| 3 |
CA6NM |
J91540 |
1.4313 |
Gr CA6NM |
Martensite |
Hardened & Tempered |
1000-1050
580-620 |
77.00 |
56.00 |
15 |
Parts of turbines, compressors, pumps and valves for chemical, pollution control, marine and power industries. Exhibits good cavitation resistance. |
| 4 |
17.4 PH |
J92180 |
1.4542 |
ASTM A747
Gr CB7Cu-1 |
Martensite |
Solution Annealed & Tempered |
1100 580 |
105.80 |
81.10 |
15 |
Wearing parts requiring corrosion resistance and high strength used in valves and in food processing, marine environment, petrochemical, pulp and paper industries at temperature upto 315 C. |
| 5 |
AISI 304 |
J92600 |
1.4308 |
Gr CF8 |
Austenite |
Solution Annealed |
1040 |
49.47 |
21.09 |
35 |
General service, pumps, valves, etc. for chemical processing, oil refineries, textile dyeing, foodmachinery, fuel jets, fuel valves engine supports, etc. |
| 6 |
AISI 304L |
J92500 |
1.4311 |
Gr CF3 |
Austenite |
Solution Annealed |
1040 |
49.47 |
21.09 |
35 |
General service, pumps, valves, etc. for chemical processing, oil refineries, textile dyeing, foodmachinery, fuel jets, fuel valves engine supports, etc. |
| 7 |
AISI 316 |
J92900 |
1.4408 |
Gr CF8M |
Austenite |
Solution Annealed |
1040 |
49.47 |
21.09 |
30 |
Pumps, valves, fittings, etc. in reducing acids, paper mill equipments, chemical process industries, sea water service, etc. |
| 8 |
AISI 316L |
J92800 |
1.4404 |
Gr CF3M |
Austenite |
Solution Annealed |
1040 |
49.47 |
21.09 |
30 |
Pumps, valves, fittings, etc. in reducing acids, paper mill equipments, chemical process industries, sea water service, etc. |
| 9 |
AISI 317 |
J93000 |
1.4438 |
Gr CG8M |
Austenite |
Solution Annealed |
1040 |
53.00 |
29.63 |
30 |
For pulp and paper mill equipments and chemical process industries. |
| 10 |
CD4MCu |
J93370 |
1.4460 |
Gr CD4MCu |
Ferrite + Austenite |
Solution Annealed |
1040 |
70.68 |
48.79 |
16 |
Castings used in chemical processing, marine environment, water supply, petroleum refining, pulp & paper, soap manufacturing and textile industries. |
| 11 |
Duplex SS |
J93345 |
- |
Gr CE8MN |
Ferrite + Austenite |
Solution Annealed |
Furnace cool from 1120 to 1045. Then quench. |
66.81 |
45.90 |
25 |
Same as CD4MCu but with enhanced properties. |
| 12 |
CN7M
(28Ni21Cr2.5Mo) |
N08007 |
- |
Gr CN7M |
Austenite |
Solution Annealed |
1120 |
43.60 |
17.58 |
35 |
Food processing, munitions manufacturing, rayon manufacturing, oil refining, paints, pharmaceuticals, synthetic rubber, soap, textile & dye industries. |
| 13 |
904L
(25Ni20Cr4Mo) |
- |
- |
- |
Austenite |
Solution Annealed |
1120 |
43.60 |
17.58 |
35 |
Food processing, munitions manufacturing, rayon manufacturing, oil refining, paints, pharmaceuticals, synthetic rubber, soap, textile & dye industries. |
| 14 |
R-55
(58Ni23Cr4Mo) |
- |
- |
- |
Austenite |
Solution Annealed |
1180 |
50.50 |
28.05 |
4 |
Used in pumps, valves and other process equipments for viscose rayon plants used in severe corrosive conditions. |
| 15 |
NiCr
(37Ni32Cr3Mo) |
- |
- |
- |
Austenite |
Solution Annealed |
1120 |
45.00 |
25.00 |
- |
Suitable for corrosion resistance applications in H2So4. Service Hardness 170 to 190BHN. |
| 16 |
M35
(65Ni30Cu) |
N24135 |
- |
ASTM A494
M35-1 |
- |
- |
- |
45.90- 63.00 |
22.60- 28.00 |
25 |
Suitable for sea water applications. High resistance to destructive chemical action & mechanical wear. |
| 17 |
CW12MW
(53Ni17Cr17Mo4W) |
N30002 |
- |
ASTM A494
Gr CW12MW |
Austenite |
Solution Annealed |
1180 |
50.63 |
28.12 |
4 |
This alloy shows outstanding resistance to highly corrosive chemicals such as wet chlorine, strong hypochloride solutions, hydrochloric acid, sulphuric acid and nitric acid at moderate temperatures. |
| 18 |
N12MV
(65Ni28Mo0.4Va) |
N30012 |
- |
ASTM A494
Gr N12MV |
Austenite |
Solution Annealed |
1095 |
53.00 |
28.05 |
6 |
This alloy has resistance to corrosion by hot concentrated hydrochloric acid solutions, wet hydrogen chloride and to other non-oxidizing acids and salts. |
| 19 |
Cast Nickel
(95Ni) |
N02100 |
- |
ASTM A494
CZ100 |
Austenite |
As Cast |
- |
35.19 |
12.75 |
10 |
For equipment handling corrosives like caustics and where contamination of product with copper & iron is to be avoided. |
| 20 |
Ni-Resist
AFG 1 |
- |
- |
ASTM A436
Type 1 |
Austenite |
As Cast |
- |
17.34 |
- |
- |
This alloy is used in mechanical seals & their machinery for the production of single superphosphate and related fertilizers. |
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