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IS 4367 40Ni6Cr4Mo3 vs BS 970 (Part 3) 817M40

Strong Match — 90.9% match based on chemical composition and mechanical property overlap.

IS 4367 40Ni6Cr4Mo3 (IS 4367:1991) and BS 970 (Part 3) 817M40 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Alloy Steel category. IS 4367 40Ni6Cr4Mo3 is typically used for aircraft landing gear, high strength shafts, gears, axles, connecting rods, heavy engineering components, while BS 970 (Part 3) 817M40 is commonly used for high tensile shafts, gears, crankshafts. IS 4367 40Ni6Cr4Mo3 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 3) 817M40 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 4367 40Ni6Cr4Mo3 vs BS 970 (Part 3) 817M40 is a 90.9% 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 90.9%.

Frequently Compared With IS 4367 40Ni6Cr4Mo3:
NF A35-565 100C6 GB/T 3077 12Cr2Ni4A UNI 11234 100Cr6 GOST 4543 12HN3A IS 1570 (Part 4) 103Cr6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 07Cr4Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6
Match Breakdown
CHEMISTRY MATCH
90.9%
MECHANICAL MATCH
No shared data
OVERALL
90.9%
Specifications
Property IS 4367 40Ni6Cr4Mo3 BS 970 (Part 3) 817M40
Standard IS 4367:1991 BS 970 (Part 3):1991
Category Alloy Steel Alloy Steel
C (%) 0.35-0.45 0.36-0.44
Si (%) 0.10-0.35 0.10-0.40
Mn (%) 0.40-0.70 0.45-0.70
Ni (%) 1.25-1.75 1.30-1.70
Cr (%) 0.90-1.30 1.00-1.40
Mo (%) 0.20-0.35 0.20-0.35
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 40Ni6Cr4Mo3 BS 970 (Part 3) 817M40
Tensile Strength 900-1050 MPa Not specified
Yield Strength 700 MPa min Not specified
Elongation >=15% Not specified
Izod Impact 55 J min Not specified
Hardness 266-311 HB Not specified
Hardness (soft annealed) <=230 HB Not specified
Condition Hardened and tempered, ruling section up to 150 mm Not specified
Typical Applications
IS 4367 40Ni6Cr4Mo3
aircraft landing gear, high strength shafts, gears, axles, connecting rods, heavy engineering components
BS 970 (Part 3) 817M40
High tensile shafts, gears, crankshafts
Can IS 4367 40Ni6Cr4Mo3 Be Substituted With BS 970 (Part 3) 817M40?
IS 4367 40Ni6Cr4Mo3 and BS 970 (Part 3) 817M40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 817M40 is often considered as a substitute for IS 4367 40Ni6Cr4Mo3 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 40Ni6Cr4Mo3
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5000–5200 mm (196.85–204.72 in)
BS 970 (Part 3) 817M40
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6200–6500 mm (244.09–255.91 in)
On M-EX Right Now
IS 4367 40Ni6Cr4Mo3
2 active listings and RFQs →
BS 970 (Part 3) 817M40
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 4367 40Ni6Cr4Mo3 and BS 970 (Part 3) 817M40?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 4367 40Ni6Cr4Mo3 be substituted with BS 970 (Part 3) 817M40?
IS 4367 40Ni6Cr4Mo3 and BS 970 (Part 3) 817M40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 817M40 is often considered as a substitute for IS 4367 40Ni6Cr4Mo3 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.