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Physical Specification of Commonly Cast Heat Resistant Alloys

Sr.
No.
Closest Equivalent Alloy IS 4522 DIN 17465 ASTMA 297 Micro-Structure Heat Treatment Temp C T.S. kg/mm2 min. Y.S. kg/mm2 min. Elong-ation min. % Applications
1 HRCS 9/19 Grade 5 1.4825 Gr HF Austenite As Cast - 58.50 24.00 25 Suitable for applications requiring high strength & corrosion resistance at 650 C to 870 C.
2 HRCS 12/25 Grade 7 1.4837 Gr HH Austenite As Cast - 51.50 24.00 10 Suitable for applications between 927 C and 1093 C.Not to be used from 750 C to 890 C and for operations invloving thermal shock & carburizing.
3 HRCS 12/25 - - Gr HH Type2 Fully Austenite As Cast - 51.50 - 4 Same as HH but with superior heat resistance and reduced ductility.
4 Canalloy - - SP Austenite - - 210.00-200.00 - - Bushes & sleeves for galvanizing line.
5 High Cobalt Chromium Alloy
(60Co30Cr)
- - - - As Cast Hardness
38 HRC. 
220 HB - - Wear plates and bars, bushes & sleeves for operation in hot & corrosive atmosphere, where lubrication is impossible, with superior performance.
6 HRCS 20/25 Grade 9 1.4848 Gr HK Austenite As Cast - 45.90 24.00 10 Suitable for stressed parts working upto 1100 C such as billet skids, heat treating trays & fixtures. Unsuited at 815 C and in operations involving thermal shocks.
7 HRCS 20/25 - 1.4848 Gr HK40 Austenite As Cast - 45.90 24.00 10 Same as HK but with better creep strength.
8 AISI 314 - - - Austenite Solution Annealed 1010-1120 - - - Same as HK but Si increased for higher heat resistance to carburization.
9 HRCS 24/24 Nb - 1.4855 IN519 Austenite As Cast - 45.00 23.00 10 Same as HK 40 but with enhanced high temperature resistance upto 1025 C.
10 HRCS 25/20 Grade 11 - Gr HN Austenite As Cast - 43.50 - 8 Suitable for applications upto 1100 C for furnace parts such as grates, etc. with increased ductility.
11 HRCS 32/20 Nb  (Incoalloy 800H) 1.4859 Castalloy 800H Austenite As Cast - 45.00 18.00 30 Suitable for manifolds and headers. Service limit upto 980 C with increased ductility.
12 HRCS 35/25 - - Gr HP Austenite As Cast - 45.00 23.00 8 Resistant to both oxidizing and carburizing atmospheres at high temperatures upto 1050 C.
13 HRCS 35/25 Nb - 1.4852 Gr HP modified Austenite As Cast - 45.00 23.00 8 Same as HP but with enhanced high temperature resistance upto 1100 C. Suitable for reformer ethylene furnace tubes, radiant tubes, etc. 
14 HRCS 35/15 Grade12 - Gr HT Austenite As Cast - 45.90 - 4 Suitable for highly stressed parts upto 1095 C including carburizing operation. High sulphur gases and thermal shocks are detrimental.
15 HRCS 39/19 Grade 13 - Gr HU Austenite As Cast - 45.90 - 4 Suitable for applications upto 1095 C including carburizing operations. Can withstand corrosive applications with rapid thermal cycles.
16 HRCS 48/28 W - 2.4859 - Austenite As Cast - 45.00 24.00 4 Same as HP but with enhanced high temperature resistance upto 1150 C. Suitable for radiant tubes, air injection tubes, reformer tubes and fittings for petrochemical furnaces, tube sheets, tube supports, etc. 
17 HRCS 48/28 Wco - - - Austenite As Cast - 45.00 24.00 4 Same as 22H but with enhanced high temperature resistance upto 1180 C.
18 HRCS 50/50 Nb - 2.4680 ASTM A560 Gr 50/50 Nb Austenite As Cast - 56.00 35.00 5 Suitable for applications upto 950 C in furnace parts. Can withstand fuel ash corrosion. Good creep strength and good resistance to oxidation and carburization.
19 HRCS 66/17 Grade 14 - Gr HX Austenite As Cast - 41.50 - - For servere service applications upto 1150 C where corrosion resistance is required.
20 CY-40
(70Ni15Cr)
- - ASTM A494
CY-40
Austenite As Cast - 49.50 20.00 30 Frequently used for elevated temperature fittings in conjunction with Inconel. Suitable for boiler feed water plants and where high strength, high resistance to wear, corrosion and oxidation at elevated temperatures is required.