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ASTM A387/A387M Grade 21L vs IS 1570 (Part 7) 10Mo6H

Related Material — 60% match based on chemical composition and mechanical property overlap.

ASTM A387/A387M Grade 21L (ASTM A387/A387M:2011) and IS 1570 (Part 7) 10Mo6H (IS 1570 (Part 7):1992) are both steel grades. Both fall under the Alloy Steel category. ASTM A387/A387M Grade 21L is typically used for welded boilers and pressure vessels for elevated temperature service, while IS 1570 (Part 7) 10Mo6H is commonly used for boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature. ASTM A387/A387M Grade 21L is defined under ASTM International, originating from United States, while IS 1570 (Part 7) 10Mo6H is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, ASTM A387/A387M Grade 21L vs IS 1570 (Part 7) 10Mo6H is a 73.3% match. As per mechanical properties, the match is 33.3%. Combined, this makes them a related material overall at 60%.

Frequently Compared With ASTM A387/A387M Grade 21L:
EN 10028-2 10CrMo9-10 IS 1570 (Part 4) 103Cr6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6 UNI 11234 100Cr6 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
73.3%
MECHANICAL MATCH
33.3%
OVERALL
60%
Specifications
Property ASTM A387/A387M Grade 21L IS 1570 (Part 7) 10Mo6H
Standard ASTM A387/A387M:2011 IS 1570 (Part 7):1992
Category Alloy Steel Alloy Steel
C (%) <=0.10 <=0.15
Mn (%) 0.30-0.60 0.30-0.60
P (%) <=0.025 <=0.030
S (%) <=0.025 <=0.030
Si (%) <=0.50 0.50-1.00
Cr (%) 2.75-3.25 1.00-1.50
Mo (%) 0.90-1.10 0.45-0.60
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 21L IS 1570 (Part 7) 10Mo6H
Tensile Strength 415-585 MPa >=415 MPa
Yield Strength >=205 MPa >=205 MPa (0.2 % proof stress)
Elongation >=18% >=30%
Condition Class 1 plates, no thickness ranges printed; elongation in 50 mm gauge length Tubes, N+T, thickness - (first row of Table 3)
Typical Applications
ASTM A387/A387M Grade 21L
Welded boilers and pressure vessels for elevated temperature service
IS 1570 (Part 7) 10Mo6H
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
Can ASTM A387/A387M Grade 21L Be Substituted With IS 1570 (Part 7) 10Mo6H?
ASTM A387/A387M Grade 21L and IS 1570 (Part 7) 10Mo6H 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 7) 10Mo6H
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Frequently Asked Questions
What is the difference between ASTM A387/A387M Grade 21L and IS 1570 (Part 7) 10Mo6H?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A387/A387M Grade 21L be substituted with IS 1570 (Part 7) 10Mo6H?
ASTM A387/A387M Grade 21L and IS 1570 (Part 7) 10Mo6H 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.