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GB/T 700 Q235 vs CSA G40.21 400W

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

GB/T 700 Q235 (GB/T 700-2006) and CSA G40.21 400W (CSA G40.21-13 (R2023)) are both steel grades. Both fall under the Structural Steel category. GB/T 700 Q235 is typically used for general structural fabrication, bridges, buildings, while CSA G40.21 400W is commonly used for heavy structural fabrication, bridges, offshore platforms, cranes, pressure vessels, mining equipment.. GB/T 700 Q235 is defined under Guobiao Standards (GB/T), originating from China, while CSA G40.21 400W is defined under Canadian Standards Association (CSA), originating from Canada.

As per chemical composition, GB/T 700 Q235 vs CSA G40.21 400W is a 82.1% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With GB/T 700 Q235:
GOST 19281 09G2S ASTM A1008 SS Grade 50 CSA G40.21 350W ASTM A572 Gr.65 ASTM A1008 SS Grade 80 CSA G40.21 400A CSA G40.21 300W AS/NZS 3679.1 300 AS/NZS 3679.1 350 CSA G40.21 480W ASTM A283C CSA G40.21 260W
Match Breakdown
CHEMISTRY MATCH
82.1%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property GB/T 700 Q235 CSA G40.21 400W
Standard GB/T 700-2006 CSA G40.21-13 (R2023)
Category Structural Steel Structural Steel
C (%) ≤0.22 max 0.23
Mn (%) 0.30–0.70 max 1.6
Si (%) ≤0.35 max 0.5
S (%) ≤0.050 max 0.035
P (%) ≤0.045 max 0.035
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property GB/T 700 Q235 CSA G40.21 400W
Tensile Strength 375–500 MPa 520-690 MPa
Yield Strength ≥235 MPa 400 MPa min
Elongation ≥26% Not specified
Typical Applications
GB/T 700 Q235
General structural fabrication, bridges, buildings
CSA G40.21 400W
Heavy structural fabrication, bridges, offshore platforms, cranes, pressure vessels, mining equipment.
Can GB/T 700 Q235 Be Substituted With CSA G40.21 400W?
GB/T 700 Q235 and CSA G40.21 400W 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
GB/T 700 Q235
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 3100–3700 mm (122.05–145.67 in)
CSA G40.21 400W
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2500–5200 mm (98.43–204.72 in)
On M-EX Right Now
GB/T 700 Q235
2 active listings and RFQs →
CSA G40.21 400W
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 700 Q235 and CSA G40.21 400W?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GB/T 700 Q235 be substituted with CSA G40.21 400W?
GB/T 700 Q235 and CSA G40.21 400W 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.