Related Material — 63.1% match
based on chemical composition and mechanical property overlap.
ASTM A572/A572M Grade 42 (ASTM A572/A572M:2021) and CSA G40.21 400A (CSA G40.21-13 (R2023)) are both steel grades.
Both fall under the Structural Steel category.
ASTM A572/A572M Grade 42 is typically used for riveted, bolted or welded structures, while CSA G40.21 400A is commonly used for atmospheric corrosion-resistant (weathering) structural steel; exposed bridge girders and structural members where high strength and weathering resistance are both needed.
ASTM A572/A572M Grade 42 is defined under ASTM International, originating from United States, while CSA G40.21 400A is defined under Canadian Standards Association (CSA), originating from Canada.
As per chemical composition, ASTM A572/A572M Grade 42 vs CSA G40.21 400A is a 94.7% match.
As per mechanical properties, the match is 0%.
Combined, this makes them a related material overall at 63.1%.
Frequently Compared With ASTM A572/A572M Grade 42:
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
ASTM A572/A572M Grade 42
CSA G40.21 400A
Tensile Strength
>=415 MPa
520-670 MPa
Yield Strength
>=290 MPa
400 MPa min
Elongation
>=20%
17% min
Condition
Tension test per Table 4; one set of minimum values for all product thicknesses; Elongation is in 200 mm gauge length, 50 mm values in the tensile block
Not specified
Impact
Not specified
27J at 0°C
Typical Applications
ASTM A572/A572M Grade 42
Riveted, bolted or welded structures
CSA G40.21 400A
Atmospheric corrosion-resistant (weathering) structural steel; exposed bridge girders and structural members where high strength and weathering resistance are both needed
Key Differences
CSA G40.21 400A specifies Cu which is not specified for ASTM A572/A572M Grade 42.
Can ASTM A572/A572M Grade 42 Be Substituted With CSA G40.21 400A?
ASTM A572/A572M Grade 42 and CSA G40.21 400A 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.
What is the difference between ASTM A572/A572M Grade 42 and CSA G40.21 400A?
CSA G40.21 400A specifies Cu which is not specified for ASTM A572/A572M Grade 42.
Can ASTM A572/A572M Grade 42 be substituted with CSA G40.21 400A?
ASTM A572/A572M Grade 42 and CSA G40.21 400A 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.