Strong Match — 89.5% match
based on chemical composition and mechanical property overlap.
BS 970 (Part 3) 709M40 (BS 970 (Part 3):1991) and IS 4367 40Cr4Mo3 (IS 4367:1991) are both steel grades.
Both fall under the Alloy Steel category.
BS 970 (Part 3) 709M40 is typically used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy direct hardening steel (table 16), while IS 4367 40Cr4Mo3 is commonly used for gears, crankshafts, connecting rods, heavy duty shafts, high strength bolts, forged components.
BS 970 (Part 3) 709M40 is defined under British Standards (BS), originating from United Kingdom, while IS 4367 40Cr4Mo3 is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, BS 970 (Part 3) 709M40 vs IS 4367 40Cr4Mo3 is a 89.5% 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 89.5%.
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 3) 709M40
IS 4367 40Cr4Mo3
Tensile Strength
Not specified
700-850 MPa
Yield Strength
Not specified
540 MPa min
Elongation
Not specified
>=18%
Izod Impact
Not specified
55 J min
Hardness
Not specified
208-252 HB
Hardness (soft annealed)
Not specified
<=220 HB
Condition
Not specified
Hardened and tempered, ruling section up to 150 mm
Typical Applications
BS 970 (Part 3) 709M40
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy direct hardening steel (Table 16)
IS 4367 40Cr4Mo3
gears, crankshafts, connecting rods, heavy duty shafts, high strength bolts, forged components
Can BS 970 (Part 3) 709M40 Be Substituted With IS 4367 40Cr4Mo3?
BS 970 (Part 3) 709M40 and IS 4367 40Cr4Mo3 overlap closely enough on chemistry and mechanical properties that IS 4367 40Cr4Mo3 is often considered as a substitute for BS 970 (Part 3) 709M40 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
What is the difference between BS 970 (Part 3) 709M40 and IS 4367 40Cr4Mo3?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 (Part 3) 709M40 be substituted with IS 4367 40Cr4Mo3?
BS 970 (Part 3) 709M40 and IS 4367 40Cr4Mo3 overlap closely enough on chemistry and mechanical properties that IS 4367 40Cr4Mo3 is often considered as a substitute for BS 970 (Part 3) 709M40 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.