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ASTM A387/A387M Grade 21L vs IS 1570 (Part 4) 07Cr4Mo6

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

ASTM A387/A387M Grade 21L (ASTM A387/A387M:2011) and IS 1570 (Part 4) 07Cr4Mo6 (IS 1570 (Part 4):1988) are both steel grades. Both fall under the Alloy Steel category. ASTM A387/A387M Grade 21L is defined under ASTM International, originating from United States, while IS 1570 (Part 4) 07Cr4Mo6 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, ASTM A387/A387M Grade 21L vs IS 1570 (Part 4) 07Cr4Mo6 is a 66.2% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With ASTM A387/A387M Grade 21L:
EN 10028-2 10CrMo9-10 IS 1570 (Part 7) 10Mo6H IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Mo6 IS 4367 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
66.2%
MECHANICAL MATCH
No shared data
OVERALL
35%
Specifications
Property ASTM A387/A387M Grade 21L IS 1570 (Part 4) 07Cr4Mo6
Standard ASTM A387/A387M:2011 IS 1570 (Part 4):1988
Category Alloy Steel Alloy Steel
C (%) <=0.10 <=0.12
Mn (%) 0.30-0.60 0.40-0.70
P (%) <=0.025 Not specified
S (%) <=0.025 Not specified
Si (%) <=0.50 0.15-0.60
Cr (%) 2.75-3.25 0.70-1.10
Mo (%) 0.90-1.10 0.45-0.65
Ni (%) Not specified <=0.30
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 21L IS 1570 (Part 4) 07Cr4Mo6
Tensile Strength 415-585 MPa Not specified
Yield Strength >=205 MPa Not specified
Elongation >=18% Not specified
Condition Class 1 plates, no thickness ranges printed; elongation in 50 mm gauge length Not specified
Typical Applications
ASTM A387/A387M Grade 21L
Welded boilers and pressure vessels for elevated temperature service
IS 1570 (Part 4) 07Cr4Mo6
Not documented
Key Differences
Can ASTM A387/A387M Grade 21L Be Substituted With IS 1570 (Part 4) 07Cr4Mo6?
ASTM A387/A387M Grade 21L and IS 1570 (Part 4) 07Cr4Mo6 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 21L
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IS 1570 (Part 4) 07Cr4Mo6
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Frequently Asked Questions
What is the difference between ASTM A387/A387M Grade 21L and IS 1570 (Part 4) 07Cr4Mo6?
ASTM A387/A387M Grade 21L specifies P, S which are not specified for IS 1570 (Part 4) 07Cr4Mo6. IS 1570 (Part 4) 07Cr4Mo6 specifies Ni which is not specified for ASTM A387/A387M Grade 21L.
Can ASTM A387/A387M Grade 21L be substituted with IS 1570 (Part 4) 07Cr4Mo6?
ASTM A387/A387M Grade 21L and IS 1570 (Part 4) 07Cr4Mo6 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.