Close Alternative — 73% match
based on chemical composition and mechanical property overlap.
ASTM A572/A572M Grade 42 (ASTM A572/A572M:2018) and CSA G40.21 350W (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 350W is commonly used for used in buildings, bridges, cranes, transmission towers, heavy equipment, and structural fabrications..
ASTM A572/A572M Grade 42 is defined under ASTM International, originating from United States, while CSA G40.21 350W is defined under Canadian Standards Association (CSA), originating from Canada.
As per chemical composition, ASTM A572/A572M Grade 42 vs CSA G40.21 350W is a 92.8% match.
As per mechanical properties, the match is 33.3%.
Combined, this makes them a close alternative overall at 73%.
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 350W
Tensile Strength
>=415 MPa
450-620 MPa
Yield Strength
>=290 MPa
350 MPa min
Elongation
>=20%
20% 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
Hardness
Not specified
135-180 HB
Typical Applications
ASTM A572/A572M Grade 42
Riveted, bolted or welded structures
CSA G40.21 350W
Used in buildings, bridges, cranes, transmission towers, heavy equipment, and structural fabrications.
Can ASTM A572/A572M Grade 42 Be Substituted With CSA G40.21 350W?
ASTM A572/A572M Grade 42 and CSA G40.21 350W 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 A572/A572M Grade 42 and CSA G40.21 350W?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A572/A572M Grade 42 be substituted with CSA G40.21 350W?
ASTM A572/A572M Grade 42 and CSA G40.21 350W 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.