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GB/T 700 Q235B vs CSA G40.21 300W

Related Material — 64.2% match based on chemical composition and mechanical property overlap.

GB/T 700 Q235B (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 Q235B is typically used for structural steelwork, fabricated components, machinery parts, storage tanks, pipes, while CSA G40.21 300W is commonly used for structural fabrication,bridges,buildings,machinery frames,general construction,welded structures. GB/T 700 Q235B 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 Q235B vs CSA G40.21 300W is a 93% match. As per mechanical properties, the match is 6.7%. Combined, this makes them a related material overall at 64.2%.

Frequently Compared With GB/T 700 Q235B:
CSA G40.21 400W CSA G40.21 260W AS/NZS 3679.1 300 GOST 19281 09G2S AS/NZS 3679.1 350 CSA G40.21 350W CSA G40.21 480W ASTM A1008 SS Grade 50 CSA G40.21 400A ASTM A1008 SS Grade 80 ASTM A283C ASTM A572 Gr.65
Match Breakdown
CHEMISTRY MATCH
93%
MECHANICAL MATCH
6.7%
OVERALL
64.2%
Specifications
Property GB/T 700 Q235B CSA G40.21 300W
Standard GB/T 700:2006 CSA G40.21-13 (R2023)
Category Structural Steel Structural Steel
C (%) <=0.20 <=0.23
Si (%) <=0.35 Not specified
Mn (%) <=1.40 <=1.50
P (%) <=0.045 <=0.040
S (%) <=0.045 <=0.050
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 Q235B CSA G40.21 300W
Tensile Strength 370-500 MPa 450-620 MPa
Yield Strength >=235 MPa 300 MPa min
Elongation >=26% 20-23 %
Condition Hot rolled, controlled rolled or normalized; yield up to 16 mm, elongation up to 40 mm (N/mm2 = MPa) Not specified
Typical Applications
GB/T 700 Q235B
structural steelwork, fabricated components, machinery parts, storage tanks, pipes
CSA G40.21 300W
structural fabrication,bridges,buildings,machinery frames,general construction,welded structures
Key Differences
Can GB/T 700 Q235B Be Substituted With CSA G40.21 300W?
GB/T 700 Q235B 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 Q235B
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2600–4800 mm (102.36–188.98 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 Q235B
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 Q235B and CSA G40.21 300W?
GB/T 700 Q235B specifies Si which is not specified for CSA G40.21 300W.
Can GB/T 700 Q235B be substituted with CSA G40.21 300W?
GB/T 700 Q235B 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.