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ASTM A387/A387M Grade 21L vs IS 11169 (Part 1) 25Cr13Mo6

Close Alternative — 70.3% match based on chemical composition and mechanical property overlap.

ASTM A387/A387M Grade 21L (ASTM A387/A387M:2011) and IS 11169 (Part 1) 25Cr13Mo6 (IS 11169 (Part 1):1984) 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 11169 (Part 1) 25Cr13Mo6 is commonly used for cold heading and cold extrusion; the standard covers wires, wire rods and bars of 2 to 100 mm diameter (clause 1.1). ASTM A387/A387M Grade 21L is defined under ASTM International, originating from United States, while IS 11169 (Part 1) 25Cr13Mo6 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, ASTM A387/A387M Grade 21L vs IS 11169 (Part 1) 25Cr13Mo6 is a 70.3% 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 70.3%.

Frequently Compared With ASTM A387/A387M Grade 21L:
EN 10028-2 10CrMo9-10 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 7) 10Mo6H IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6 IS 4367 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6
Match Breakdown
CHEMISTRY MATCH
70.3%
MECHANICAL MATCH
No shared data
OVERALL
70.3%
Specifications
Property ASTM A387/A387M Grade 21L IS 11169 (Part 1) 25Cr13Mo6
Standard ASTM A387/A387M:2011 IS 11169 (Part 1):1984
Category Alloy Steel Alloy Steel
C (%) <=0.10 0.20-0.30
Mn (%) 0.30-0.60 0.40-0.70
P (%) <=0.025 Not specified
S (%) <=0.025 Not specified
Si (%) <=0.50 0.10-0.35
Cr (%) 2.75-3.25 2.90-3.40
Mo (%) 0.90-1.10 0.45-0.65
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 11169 (Part 1) 25Cr13Mo6
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
Hardness, annealed Not specified <=190 HB
Typical Applications
ASTM A387/A387M Grade 21L
Welded boilers and pressure vessels for elevated temperature service
IS 11169 (Part 1) 25Cr13Mo6
Cold heading and cold extrusion; the standard covers wires, wire rods and bars of 2 to 100 mm diameter (clause 1.1)
Key Differences
Can ASTM A387/A387M Grade 21L Be Substituted With IS 11169 (Part 1) 25Cr13Mo6?
ASTM A387/A387M Grade 21L and IS 11169 (Part 1) 25Cr13Mo6 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
ASTM A387/A387M Grade 21L
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IS 11169 (Part 1) 25Cr13Mo6
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Frequently Asked Questions
What is the difference between ASTM A387/A387M Grade 21L and IS 11169 (Part 1) 25Cr13Mo6?
ASTM A387/A387M Grade 21L specifies P, S which are not specified for IS 11169 (Part 1) 25Cr13Mo6.
Can ASTM A387/A387M Grade 21L be substituted with IS 11169 (Part 1) 25Cr13Mo6?
ASTM A387/A387M Grade 21L and IS 11169 (Part 1) 25Cr13Mo6 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.