Close Alternative — 71% match
based on chemical composition and mechanical property overlap.
ASTM A387/A387M Grade 2 (ASTM A387/A387M:2011) and EN 10084 20MoCrS4 (EN 10084:2008) are both steel grades.
Both fall under the Alloy Steel category.
ASTM A387/A387M Grade 2 is typically used for welded boilers and pressure vessels for elevated temperature service, while EN 10084 20MoCrS4 is commonly used for case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1).
ASTM A387/A387M Grade 2 is defined under ASTM International, originating from United States, while EN 10084 20MoCrS4 is defined under European Standard (EN), originating from Europe.
As per chemical composition, ASTM A387/A387M Grade 2 vs EN 10084 20MoCrS4 is a 71% 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 71%.
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 2
EN 10084 20MoCrS4
Tensile Strength
380-550 MPa
Not specified
Yield Strength
>=230 MPa
Not specified
Elongation
>=22%
Not specified
Condition
Class 1 plates, no thickness ranges printed; elongation in 50 mm gauge length
Soft annealed
Hardenability
Not specified
+H band at 1.5 mm from the quenched end: 41 to 49 HRC
Hardness
Not specified
Soft annealed: 207 HB max
Typical Applications
ASTM A387/A387M Grade 2
Welded boilers and pressure vessels for elevated temperature service
EN 10084 20MoCrS4
Case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1)
Can ASTM A387/A387M Grade 2 Be Substituted With EN 10084 20MoCrS4?
ASTM A387/A387M Grade 2 and EN 10084 20MoCrS4 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.
What is the difference between ASTM A387/A387M Grade 2 and EN 10084 20MoCrS4?
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 2 be substituted with EN 10084 20MoCrS4?
ASTM A387/A387M Grade 2 and EN 10084 20MoCrS4 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.