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BS 970 (Part 1) 817M40 vs IS 4367 40Ni6Cr4Mo3

Strong Match — 86.1% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 817M40 (BS 970 (Part 1):1983) and IS 4367 40Ni6Cr4Mo3 (IS 4367:1991) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 817M40 is typically used for through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of table 6., while IS 4367 40Ni6Cr4Mo3 is commonly used for aircraft landing gear, high strength shafts, gears, axles, connecting rods, heavy engineering components. BS 970 (Part 1) 817M40 is defined under British Standards (BS), originating from United Kingdom, while IS 4367 40Ni6Cr4Mo3 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, BS 970 (Part 1) 817M40 vs IS 4367 40Ni6Cr4Mo3 is a 86.1% 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 86.1%.

Frequently Compared With BS 970 (Part 1) 817M40:
IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 10Mo6H
Match Breakdown
CHEMISTRY MATCH
86.1%
MECHANICAL MATCH
No shared data
OVERALL
86.1%
Specifications
Property BS 970 (Part 1) 817M40 IS 4367 40Ni6Cr4Mo3
Standard BS 970 (Part 1):1983 IS 4367:1991
Category Alloy Steel Alloy Steel
C (%) 0.36-0.44 0.35-0.45
Mn (%) 0.45-0.70 0.40-0.70
Cr (%) 1.00-1.40 0.90-1.30
Mo (%) 0.20-0.35 0.20-0.35
Ni (%) 1.30-1.70 1.25-1.75
P (%) <=0.035 <=0.035
S (%) <=0.040 <=0.035
Si (%) Not specified 0.10-0.35
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property BS 970 (Part 1) 817M40 IS 4367 40Ni6Cr4Mo3
Tensile Strength Not specified 900-1050 MPa
Yield Strength Not specified 700 MPa min
Elongation Not specified >=15%
Izod Impact Not specified 55 J min
Hardness Not specified 266-311 HB
Hardness (soft annealed) Not specified <=230 HB
Condition Not specified Hardened and tempered, ruling section up to 150 mm
Typical Applications
BS 970 (Part 1) 817M40
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
IS 4367 40Ni6Cr4Mo3
aircraft landing gear, high strength shafts, gears, axles, connecting rods, heavy engineering components
Key Differences
Can BS 970 (Part 1) 817M40 Be Substituted With IS 4367 40Ni6Cr4Mo3?
BS 970 (Part 1) 817M40 and IS 4367 40Ni6Cr4Mo3 overlap closely enough on chemistry and mechanical properties that IS 4367 40Ni6Cr4Mo3 is often considered as a substitute for BS 970 (Part 1) 817M40 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
BS 970 (Part 1) 817M40
No active listings currently.
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)
On M-EX Right Now
BS 970 (Part 1) 817M40
0 active listings and RFQs →
IS 4367 40Ni6Cr4Mo3
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 1) 817M40 and IS 4367 40Ni6Cr4Mo3?
IS 4367 40Ni6Cr4Mo3 specifies Si which is not specified for BS 970 (Part 1) 817M40.
Can BS 970 (Part 1) 817M40 be substituted with IS 4367 40Ni6Cr4Mo3?
BS 970 (Part 1) 817M40 and IS 4367 40Ni6Cr4Mo3 overlap closely enough on chemistry and mechanical properties that IS 4367 40Ni6Cr4Mo3 is often considered as a substitute for BS 970 (Part 1) 817M40 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.