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Choudhary Metals is a trusted importer, exporter, and supplier of premium non-ferrous and ferrous metals, serving diverse industries worldwide. With a strong focus on quality and reliability, we deliver copper, brass, aluminium, bronze, and other metals in various forms to meet every industrial need.

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Heat Resistant Casting

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Heat Resistant Casting


Our company specializes in manufacturing and supplying high-performance Stainless Steels containing an optimized blend of Carbon, Chromium, Nickel, and other alloying elements.
These steels are engineered to deliver exceptional resistance to oxidation (scaling) up to 1150°C and superior high-temperature strength.
With excellent resistance to sigma phase precipitation and enhanced creep properties, our cast components consistently outperform wrought alternatives.
Designed for demanding thermal environments, they are widely used in furnaces, radiant tubes, muffle liners, and heat treatment trays.
Every product is crafted to meet stringent industrial standards and ensure long-lasting performance under extreme operating conditions.

Chemical Specification of Commonly Cast Heat Resistant Alloys


Closest Equivalent Alloy IS 4522 Closest DIN 17445 ASTM - A297 Gr C % Ni % C % Ni % Cr (%) Mo (%) Si (%) Mn (%) Others (%)
- - - HA 0.20 max - 8.00 -
10.00		 0.90 -
1.20		 1.0
max		 0.35 -
0.65		 -
HRCS
28/4		 - - HC 0.50 4.0
max		 26.0 -
30.0		 0.5
max		 2.0
max		 1.0
max		 -
HRCS
5/28		 Grade 4 - HD 0.5
max		 4.0 -
7.0		 26.0 -
30.0		 0.5
max		 2.0
max		 1.5
max 		-
HRCS
9/29		 Grade 6 - HE 0.20 -
0.50		 8.0 -
11.0		 26.0 -
30.0		 0.5
max		 2.0
max		 2.0
max 		-
HRCS
9/19		 Grade 5 1.4825 HF 0.20 -
0.40		 8.0 -
12.0		 18.0 -
23.0		 0.5
max		 2.0
max		 2.0
max		 -
HRCS
12/25		 Grade 7 1.4837 HH 0.20 -
0.50		 11.0 -
14.0		 24.0 -
28.0		 0.5
max		 2.0
max		 2.0
max		 -
HRCS
12/25		 - - HH
Type2		 0.20 -
0.50		 11.0 -
15.0		 22.0 -
24.0		 0.5
max		 1.75
max		 2.5
max		 -
HRCS
15/28		 - - HI 0.20 -
0.50		 14.0 -
18.0		 26.0 -
30.0		 0.5
max		 2.0
max		 2.0
max 		-
HRCS
20/25		 Grade 9 1.4848 HK 0.20 -
0.60		 18.0 -
22.0		 24.0 -
28.0		 0.5
max		 2.0
max		 2.0
max		 -
HRCS
20/25		 - 1.4848 HK40 0.35 -
0.45		 19.0 -
22.0		 23.0 -
27.0		 0.5
max		 1.75
max		 1.5
max		 -
AISI
314		 - - - 0.25
max		 19.0 -
22.0		 23.0 -
26.0		 - 1.5 -
3.0		 2.0
max		 -
HRCS
HKNb		 - - HK40 Nb 0.35 19.0 -
22.0		 23.0 -
27.0		 0.5 max 0.5 -
2.0		 1.5
max		 0.5 - 1.5 Nb
HRCS
24/24 Nb		 - 1.4855 IN519 0.25 -
0.35		 23.0 -
25.0		 23.0 -
25.0		 0.5
max		 0.1
max		 1.0
max		 1.4 Nb
HRCS
29/20		 Grade 10 - HL 0.2 -
0.6		 18.0 -
22.0		 28.0 -
32.0		 0.5
max		 2.0
max		 2.0
max		 -
HRCS
25/20		 Grade 11 - HN 0.20 -
0.50		 23.0 -
27.0		 19.0 -
23.0		 0.5
max		 2.0
max		 2.0
max		 -
HRCS
32/20 Nb 		- 1.4859 Castalloy
800H		 0.10 -
0.15		 30.0 -
33.0		 19.0 -
21.0		 0.5
max		 1.5
max		 1.5
max		 0.8 - 1.0 Nb
HRCS
35/25		 - - HP 0.35 -
0.75		 33.0 -
37.0		 24.0 -
28.0		 0.5
max		 2.5
max		 2.0
max		 -
HRCS
35/25 Nb		 - 1.4852 HP modified 0.35 -
0.45		 33.0 -
36.0		 24.0 -
28.0		 0.5
max		 1.2
max		 1.2
max		 0.5 - 1.0 W,
0.8 - 1.2 Nb
HP-Mo - - - 0.35 -
0.45		 33.0 -
36.0		 24.0 -
28.0		 1.0 -
1.5		 1.6
max		 1.0
max		 -
HRCS
35/15		 Grade12 - HT 0.35 -
0.75		 33.0 -
37.0		 15.0 -
19.0		 0.5
max		 2.5
max		 2.0
max		 -
HRCS
39/19		 Grade 13 - HU 0.35 -
0.75		 37.0 -
41.0		 17.0 -
21.0		 0.5
max		 2.5
max		 2.0
max		 -
45/30
Nbw		 - - - 0.40
max		 42.0 -
46.0		 32.0 -
36.0		 - 1.0
max		 1.0
max		 0.5 W
0.5 Nb
22H - 2.4879 - 0.35 -
0.45		 48.0 -
52.0		 27.0 -
29.0		 - 1.5
max		 1.5
max		 4.0 - 6.0 W
Super 22H - - - 0.40 -
0.50		 46.0 -
50.0		 27.0 -
29.0		 - 2.0
max		 1.5
max		 4.0 - 6.0 W,
2.0 - 4.0 Co
HRCS
60/12		 - - HW 0.35 -
0.75		 58.0 -
62.0		 10.0 -
14.0		 0.5
max		 2.5
max		 2.0
max		 -
HRCS 66/17 Grade 14 - HX 0.35 -
0.75		 64.0 -
68.0		 15.0 -
19.0		 0.5
max		 2.5
max		 2.0
max		 -
Canalloy - - - 0.50 -
0.65		 10.0 -
14.0		 22.0 -
26.0		 - 1.75 -
2.25		 1.5
max		 -
Canalloy Controlled Manganese - - 0.65
max		 10.0 -
14.0		 22.0 -
26.0		 - 1.75 -
2.25		 0.75 -
1.50		 0.03 S max
0.03 P max
UMCO-50 - - - 0.05 -
0.12		 - 27.0 -
29.0		 - 0.5 -
1.0		 0.5 -
1.0		 48.0 - 52.0 Co,
Bal Fe
Cobalt Alloy 6 - R30006 - 0.90 -
1.40		 3.0 max 28.0 -
32.0		 1.5
max		 2.0
max		 2.0
smax 		3.0 Fe max,
3.5 - 5.5 W,
Bal Co
Cobalt Alloy 12 - R30012 - 1.70 -
2.00		 1.5
max		 27.0 -
32.0		 - 0.7
max		 2.5
max		 7.5 - 9.5 W,
3.0 Fe max,
Bal Co
Cobalt Alloy Special - - - 1.10 -
1.40		 - 26.0 -
28.0		 - 1.8 -
2.2		 0.4 -
0.8		 63.0 - 67.0 Co,
4.0 - 5.0 W,
2.0 Fe max
40 Ni
60 CrNb		 R20600 - ASTM
A560 Gr
40/60 Nb		 0.10
max		 Balance 58.0 -
62.0		 - 1.0
max		 0.3
max		 0.02 P max,
0.02 S max,
0.3 N max,
1.0 Fe max,
0.5 Al max,
0.25 Nb max
50 Ni
50 CrNb		 - 2.4680 ASTM
A560 Gr
50/50 Nb		 0.10
max		 Balance 47.0 -
52.0		 - 0.5
max		 0.3
max		 1.4 - 1.7 Nb,
0.02 P max,
0.02 S max,
1.0 Fe max
60 Ni
40 CrNb		 - - ASTM
A560 Gr
60/40 Nb		 - - - - - - -
CY-40 (70Ni15Cr) - - ASTM
A494 Gr
CY-40		 0.35 -
0.45		 Balance 14.0 -
17.0		 - 3.0
max		 1.5
max		 11.0 Fe max
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