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IS 1570 (Part 7) 40CrMoVH vs BS 970 (Part 1) 709M40

Close Alternative — 74.7% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 7) 40CrMoVH (IS 1570 (Part 7):1992) and BS 970 (Part 1) 709M40 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. IS 1570 (Part 7) 40CrMoVH is typically used for boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature, while BS 970 (Part 1) 709M40 is commonly used for through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of table 6.. IS 1570 (Part 7) 40CrMoVH is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 709M40 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 1570 (Part 7) 40CrMoVH vs BS 970 (Part 1) 709M40 is a 74.7% 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 74.7%.

Frequently Compared With IS 1570 (Part 7) 40CrMoVH:
NF A35-565 100C6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 7) 12Cr2Mo5V2H IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 10Mo6 UNI 11234 100Cr6 IS 4367 07Cr4Mo6 IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
74.7%
MECHANICAL MATCH
No shared data
OVERALL
74.7%
Specifications
Property IS 1570 (Part 7) 40CrMoVH BS 970 (Part 1) 709M40
Standard IS 1570 (Part 7):1992 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.36-0.44 0.36-0.44
Si (%) 0.10-0.35 Not specified
Mn (%) 0.45-0.85 0.70-1.00
P (%) <=0.030 <=0.035
S (%) <=0.03 <=0.040
Cr (%) 0.9-1.2 0.90-1.20
Mo (%) 0.55-0.75 0.25-0.35
V (%) 0.25-0.35 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 1570 (Part 7) 40CrMoVH BS 970 (Part 1) 709M40
Tensile Strength 850-1000 MPa Not specified
Yield Strength >=700 MPa (0.2 % proof stress) Not specified
Elongation >=14% Not specified
Condition Bars, forgings, Q+T, thickness up to 100 (first row of Table 3) Not specified
Typical Applications
IS 1570 (Part 7) 40CrMoVH
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
BS 970 (Part 1) 709M40
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
Key Differences
Can IS 1570 (Part 7) 40CrMoVH Be Substituted With BS 970 (Part 1) 709M40?
IS 1570 (Part 7) 40CrMoVH and BS 970 (Part 1) 709M40 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.
On M-EX Right Now
IS 1570 (Part 7) 40CrMoVH
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BS 970 (Part 1) 709M40
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Frequently Asked Questions
What is the difference between IS 1570 (Part 7) 40CrMoVH and BS 970 (Part 1) 709M40?
IS 1570 (Part 7) 40CrMoVH specifies Si, V which are not specified for BS 970 (Part 1) 709M40.
Can IS 1570 (Part 7) 40CrMoVH be substituted with BS 970 (Part 1) 709M40?
IS 1570 (Part 7) 40CrMoVH and BS 970 (Part 1) 709M40 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.