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IS 4367 20NiCrMo2 vs BS 970 (Part 1) 805A20

Strong Match — 93.9% match based on chemical composition and mechanical property overlap.

IS 4367 20NiCrMo2 (IS 4367:1991) and BS 970 (Part 1) 805A20 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. IS 4367 20NiCrMo2 is typically used for nickel-chromium-molybdenum case-hardening steel; used for highly stressed gears, shafts, and transmission components requiring high core strength, toughness, and wear-resistant carburized surface, while BS 970 (Part 1) 805A20 is commonly used for case hardening steel for mechanical and allied engineering purposes (table 11 mechanical properties).. IS 4367 20NiCrMo2 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 805A20 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 4367 20NiCrMo2 vs BS 970 (Part 1) 805A20 is a 93.9% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 93.9%.

Frequently Compared With IS 4367 20NiCrMo2:
GOST 4543 12HN3A UNI 11234 100Cr6 NF A35-565 100C6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 7) 10Mo6H IS 4367 07Cr4Mo6
Match Breakdown
CHEMISTRY MATCH
93.9%
MECHANICAL MATCH
No shared data
OVERALL
93.9%
Specifications
Property IS 4367 20NiCrMo2 BS 970 (Part 1) 805A20
Standard IS 4367:1991 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.18-0.23 0.18-0.23
Si (%) 0.20-0.35 Not specified
Mn (%) 0.70-0.90 0.70-0.90
Ni (%) 0.40-0.70 0.40-0.70
Cr (%) 0.40-0.60 0.40-0.60
Mo (%) 0.15-0.25 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 20NiCrMo2 BS 970 (Part 1) 805A20
Tensile Strength 900 MPa min Not specified
Elongation >=11% Not specified
Izod Impact 41 J min Not specified
Hardness (soft annealed) <=213 HB Not specified
Condition Refined, quenched and stress relieved (core properties), ruling section up to 30 mm Not specified
Typical Applications
IS 4367 20NiCrMo2
Nickel-chromium-molybdenum case-hardening steel; used for highly stressed gears, shafts, and transmission components requiring high core strength, toughness, and wear-resistant carburized surface
BS 970 (Part 1) 805A20
Case hardening steel for mechanical and allied engineering purposes (Table 11 mechanical properties).
Key Differences
Can IS 4367 20NiCrMo2 Be Substituted With BS 970 (Part 1) 805A20?
IS 4367 20NiCrMo2 and BS 970 (Part 1) 805A20 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 805A20 is often considered as a substitute for IS 4367 20NiCrMo2 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
IS 4367 20NiCrMo2
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5900–6300 mm (232.28–248.03 in)
BS 970 (Part 1) 805A20
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On M-EX Right Now
IS 4367 20NiCrMo2
2 active listings and RFQs →
BS 970 (Part 1) 805A20
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Frequently Asked Questions
What is the difference between IS 4367 20NiCrMo2 and BS 970 (Part 1) 805A20?
IS 4367 20NiCrMo2 specifies Si which is not specified for BS 970 (Part 1) 805A20.
Can IS 4367 20NiCrMo2 be substituted with BS 970 (Part 1) 805A20?
IS 4367 20NiCrMo2 and BS 970 (Part 1) 805A20 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 805A20 is often considered as a substitute for IS 4367 20NiCrMo2 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.