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IS 4432 15Ni7Cr4Mo2-S vs BS 970 (Part 1) 820H17

Close Alternative — 82.3% match based on chemical composition and mechanical property overlap.

IS 4432 15Ni7Cr4Mo2-S (IS 4432:1988) and BS 970 (Part 1) 820H17 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Alloy Steel category. IS 4432 15Ni7Cr4Mo2-S is typically used for forgings and fabrication of case-hardened machine or automobile parts, while BS 970 (Part 1) 820H17 is commonly used for case hardening steel (section four). IS 4432 15Ni7Cr4Mo2-S is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 820H17 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 4432 15Ni7Cr4Mo2-S vs BS 970 (Part 1) 820H17 is a 82.3% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 82.3%.

Frequently Compared With IS 4432 15Ni7Cr4Mo2-S:
IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 4367 10Cr9Mo10 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 7) 10Mo6H
Match Breakdown
CHEMISTRY MATCH
82.3%
MECHANICAL MATCH
No shared data
OVERALL
82.3%
Specifications
Property IS 4432 15Ni7Cr4Mo2-S BS 970 (Part 1) 820H17
Standard IS 4432:1988 BS 970 (Part 1):1991
Category Alloy Steel Alloy Steel
C (%) 0.12-0.18 0.14-0.20
Si (%) 0.15-0.35 Not specified
Mn (%) 0.60-1.00 0.60-0.90
Ni (%) 1.50-2.00 1.60-2.00
Cr (%) 0.75-1.25 0.80-1.20
Mo (%) 0.10-0.20 0.10-0.20
S (%) 0.020-0.035 Not specified
P (%) <=0.035 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 4432 15Ni7Cr4Mo2-S BS 970 (Part 1) 820H17
Core Tensile Strength 1100-1400 MPa (16 mm) / 1050-1400 MPa (30 mm) / 800-1100 MPa (63 mm) Not specified
Core Yield Strength >=750 MPa (16 mm) / >=730 MPa (30 mm) / >=550 MPa (63 mm) Not specified
Core Elongation >=9% (16 mm) / >=10% (30 mm) / >=12% (63 mm) Not specified
Core Reduction of Area >=40% (16 mm) / >=40% (30 mm) / >=45% (63 mm) Not specified
Hardness, annealed (A) <=229 HB Not specified
Typical Applications
IS 4432 15Ni7Cr4Mo2-S
Forgings and fabrication of case-hardened machine or automobile parts
BS 970 (Part 1) 820H17
Case hardening steel (section four)
Key Differences
Can IS 4432 15Ni7Cr4Mo2-S Be Substituted With BS 970 (Part 1) 820H17?
IS 4432 15Ni7Cr4Mo2-S and BS 970 (Part 1) 820H17 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
On M-EX Right Now
IS 4432 15Ni7Cr4Mo2-S
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BS 970 (Part 1) 820H17
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Frequently Asked Questions
What is the difference between IS 4432 15Ni7Cr4Mo2-S and BS 970 (Part 1) 820H17?
IS 4432 15Ni7Cr4Mo2-S specifies Si, S, P which are not specified for BS 970 (Part 1) 820H17.
Can IS 4432 15Ni7Cr4Mo2-S be substituted with BS 970 (Part 1) 820H17?
IS 4432 15Ni7Cr4Mo2-S and BS 970 (Part 1) 820H17 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.