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CSA G40.21 400A vs AS/NZS 1595 C450

Related Material — 63.3% match based on chemical composition and mechanical property overlap.

CSA G40.21 400A (CSA G40.21-13 (R2023)) and AS/NZS 1595 C450 (AS/NZS 1595:1998) are both steel grades. Both fall under the Structural Steel category. CSA G40.21 400A is typically used for atmospheric corrosion-resistant (weathering) structural steel; exposed bridge girders and structural members where high strength and weathering resistance are both needed, while AS/NZS 1595 C450 is commonly used for higher-strength cold-rolled structural steel sheet; roll-forming, purlins, high-strength cold-formed sections. CSA G40.21 400A is defined under Canadian Standards Association (CSA), originating from Canada, while AS/NZS 1595 C450 is defined under Australian/New Zealand Standard (AS/NZS), originating from Australia/New Zealand.

As per chemical composition, CSA G40.21 400A vs AS/NZS 1595 C450 is a 94.9% match. As per mechanical properties, the match is 0%. Combined, this makes them a related material overall at 63.3%.

Frequently Compared With CSA G40.21 400A:
CSA G40.21 480W CSA G40.21 350W ASTM A1008 SS Grade 50 ASTM A1008 SS Grade 80 AS/NZS 1595 C350 CSA G40.21 260W CSA G40.21 300W IS 2062 E250A CSA G40.21 400W ASTM A572 Grade 50 ASTM A283C IS 2062 E250B0
Match Breakdown
CHEMISTRY MATCH
94.9%
MECHANICAL MATCH
0%
OVERALL
63.3%
Specifications
Property CSA G40.21 400A AS/NZS 1595 C450
Standard CSA G40.21-13 (R2023) AS/NZS 1595:1998
Category Structural Steel Structural Steel
C (%) <=0.23 <=0.22
Mn (%) <=1.60 <=1.60
Si (%) <=0.40 <=0.50
P (%) <=0.035 <=0.040
S (%) <=0.035 <=0.040
Cu (%) 0.20-0.40 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property CSA G40.21 400A AS/NZS 1595 C450
Tensile Strength 520-670 MPa 500 MPa min
Yield Strength 400 MPa min 450 MPa min
Elongation 17% min 12% min
Impact 27J at 0°C Not specified
Typical Applications
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
AS/NZS 1595 C450
Higher-strength cold-rolled structural steel sheet; roll-forming, purlins, high-strength cold-formed sections
Key Differences
Can CSA G40.21 400A Be Substituted With AS/NZS 1595 C450?
CSA G40.21 400A and AS/NZS 1595 C450 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.
Forms & Sizes Available on M-EX
CSA G40.21 400A
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2800–4200 mm (110.24–165.35 in)
AS/NZS 1595 C450
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2500–2500 mm (98.43–98.43 in)
On M-EX Right Now
CSA G40.21 400A
2 active listings and RFQs →
AS/NZS 1595 C450
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between CSA G40.21 400A and AS/NZS 1595 C450?
CSA G40.21 400A specifies Cu which is not specified for AS/NZS 1595 C450.
Can CSA G40.21 400A be substituted with AS/NZS 1595 C450?
CSA G40.21 400A and AS/NZS 1595 C450 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.