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GB/T 700 Q235 vs CSA G40.21 300W

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

GB/T 700 Q235 (GB/T 700-2006) and CSA G40.21 300W (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 300W is commonly used for structural fabrication,bridges,buildings,machinery frames,general construction,welded structures. GB/T 700 Q235 is defined under Guobiao Standards (GB/T), originating from China, while CSA G40.21 300W is defined under Canadian Standards Association (CSA), originating from Canada.

As per chemical composition, GB/T 700 Q235 vs CSA G40.21 300W is a 88.5% 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 CSA G40.21 400W ASTM A1008 SS Grade 80 CSA G40.21 400A AS/NZS 3679.1 300 AS/NZS 3679.1 350 CSA G40.21 480W ASTM A283C CSA G40.21 260W
Match Breakdown
CHEMISTRY MATCH
88.5%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property GB/T 700 Q235 CSA G40.21 300W
Standard GB/T 700-2006 CSA G40.21-13 (R2023)
Category Structural Steel Structural Steel
C (%) ≤0.22 <=0.23
Mn (%) 0.30–0.70 <=1.50
Si (%) ≤0.35 Not specified
S (%) ≤0.050 <=0.050
P (%) ≤0.045 <=0.040
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 300W
Tensile Strength 375–500 MPa 450-620 MPa
Yield Strength ≥235 MPa 300 MPa min
Elongation ≥26% 20-23 %
Typical Applications
GB/T 700 Q235
General structural fabrication, bridges, buildings
CSA G40.21 300W
structural fabrication,bridges,buildings,machinery frames,general construction,welded structures
Key Differences
Can GB/T 700 Q235 Be Substituted With CSA G40.21 300W?
GB/T 700 Q235 and CSA G40.21 300W 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 300W
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2700–2800 mm (106.3–110.24 in)
On M-EX Right Now
GB/T 700 Q235
2 active listings and RFQs →
CSA G40.21 300W
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 700 Q235 and CSA G40.21 300W?
GB/T 700 Q235 specifies Si which is not specified for CSA G40.21 300W.
Can GB/T 700 Q235 be substituted with CSA G40.21 300W?
GB/T 700 Q235 and CSA G40.21 300W 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.