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ASTM A387/A387M Grade 11 vs BS 970 (Part 1) 720M32

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

ASTM A387/A387M Grade 11 (ASTM A387/A387M:2011) and BS 970 (Part 1) 720M32 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. ASTM A387/A387M Grade 11 is typically used for welded boilers and pressure vessels for elevated temperature service, while BS 970 (Part 1) 720M32 is commonly used for through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of table 6.. ASTM A387/A387M Grade 11 is defined under ASTM International, originating from United States, while BS 970 (Part 1) 720M32 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, ASTM A387/A387M Grade 11 vs BS 970 (Part 1) 720M32 is a 70.9% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With ASTM A387/A387M Grade 11:
IS 1570 (Part 7) 12Cr4Mo5H NF A35-565 100C6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 4367 07Cr4Mo6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
70.9%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property ASTM A387/A387M Grade 11 BS 970 (Part 1) 720M32
Standard ASTM A387/A387M:2011 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.05-0.17 0.28-0.35
Mn (%) 0.40-0.65 0.40-0.70
P (%) <=0.025 <=0.035
S (%) <=0.025 <=0.040
Si (%) 0.50-0.80 Not specified
Cr (%) 1.00-1.50 2.80-3.30
Mo (%) 0.45-0.65 0.40-0.60
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property ASTM A387/A387M Grade 11 BS 970 (Part 1) 720M32
Tensile Strength 415-585 MPa Not specified
Yield Strength >=240 MPa Not specified
Elongation >=22% Not specified
Condition Class 1 plates, no thickness ranges printed; elongation in 50 mm gauge length Not specified
Typical Applications
ASTM A387/A387M Grade 11
Welded boilers and pressure vessels for elevated temperature service
BS 970 (Part 1) 720M32
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
Key Differences
Can ASTM A387/A387M Grade 11 Be Substituted With BS 970 (Part 1) 720M32?
ASTM A387/A387M Grade 11 and BS 970 (Part 1) 720M32 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
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ASTM A387/A387M Grade 11
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BS 970 (Part 1) 720M32
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Frequently Asked Questions
What is the difference between ASTM A387/A387M Grade 11 and BS 970 (Part 1) 720M32?
ASTM A387/A387M Grade 11 specifies Si which is not specified for BS 970 (Part 1) 720M32.
Can ASTM A387/A387M Grade 11 be substituted with BS 970 (Part 1) 720M32?
ASTM A387/A387M Grade 11 and BS 970 (Part 1) 720M32 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.