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IS 4367 21Cr4Mo2 vs BS 970 (Part 1) 708A37

Close Alternative — 78.2% match based on chemical composition and mechanical property overlap.

IS 4367 21Cr4Mo2 (IS 4367:1991) and BS 970 (Part 1) 708A37 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. IS 4367 21Cr4Mo2 is typically used for gears, shafts, studs, bolts, automotive transmission components, high-strength fasteners., while BS 970 (Part 1) 708A37 is commonly used for used for gears, shafts, studs, machine spindles, crankshafts, and automotive components.. IS 4367 21Cr4Mo2 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 708A37 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 4367 21Cr4Mo2 vs BS 970 (Part 1) 708A37 is a 78.2% 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 78.2%.

Frequently Compared With IS 4367 21Cr4Mo2:
NF A35-565 100C6 UNI 11234 100Cr6 GOST 4543 12HN3A GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
78.2%
MECHANICAL MATCH
No shared data
OVERALL
78.2%
Specifications
Property IS 4367 21Cr4Mo2 BS 970 (Part 1) 708A37
Standard IS 4367:1991 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) <=0.26 0.35-0.40
Si (%) 0.10-0.35 Not specified
Mn (%) 0.50-0.80 0.70-0.90
Cr (%) 0.90-1.20 0.90-1.20
Mo (%) 0.15-0.30 0.15-0.25
S (%) <=0.035 <=0.040
P (%) <=0.035 <=0.035
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 4367 21Cr4Mo2 BS 970 (Part 1) 708A37
Tensile Strength 650-800 MPa Not specified
Yield Strength 420 MPa min Not specified
Elongation >=16% Not specified
Izod Impact 60 J min Not specified
Hardness 190-235 HB Not specified
Hardness (soft annealed) <=210 HB Not specified
Condition Hardened and tempered, ruling section up to 150 mm Not specified
Typical Applications
IS 4367 21Cr4Mo2
Gears, shafts, studs, bolts, automotive transmission components, high-strength fasteners.
BS 970 (Part 1) 708A37
Used for gears, shafts, studs, machine spindles, crankshafts, and automotive components.
Key Differences
Can IS 4367 21Cr4Mo2 Be Substituted With BS 970 (Part 1) 708A37?
IS 4367 21Cr4Mo2 and BS 970 (Part 1) 708A37 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.
Forms & Sizes Available on M-EX
IS 4367 21Cr4Mo2
Round Bar → (4 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5400–7000 mm (212.6–275.59 in)
BS 970 (Part 1) 708A37
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6700–7000 mm (263.78–275.59 in)
On M-EX Right Now
IS 4367 21Cr4Mo2
4 active listings and RFQs →
BS 970 (Part 1) 708A37
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 4367 21Cr4Mo2 and BS 970 (Part 1) 708A37?
IS 4367 21Cr4Mo2 specifies Si which is not specified for BS 970 (Part 1) 708A37.
Can IS 4367 21Cr4Mo2 be substituted with BS 970 (Part 1) 708A37?
IS 4367 21Cr4Mo2 and BS 970 (Part 1) 708A37 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.