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GB/T 700 Q275B vs CSA G40.21 400A

Related Material — 63.6% match based on chemical composition and mechanical property overlap.

GB/T 700 Q275B (GB/T 700:2006) and CSA G40.21 400A (CSA G40.21-13 (R2023)) are both steel grades. Both fall under the Structural Steel category. GB/T 700 Q275B is typically used for hot rolled structural sheets, strips, sections and bars for welding, riveting and bolting engineering, while CSA G40.21 400A is commonly used for atmospheric corrosion-resistant (weathering) structural steel; exposed bridge girders and structural members where high strength and weathering resistance are both needed. GB/T 700 Q275B is defined under Guobiao Standards (GB/T), originating from China, while CSA G40.21 400A is defined under Canadian Standards Association (CSA), originating from Canada.

As per chemical composition, GB/T 700 Q275B vs CSA G40.21 400A is a 94.1% match. As per mechanical properties, the match is 2.6%. Combined, this makes them a related material overall at 63.6%.

Frequently Compared With GB/T 700 Q275B:
AS/NZS 3679.1 300 CSA G40.21 300W AS/NZS 3679.1 350 GOST 19281 09G2S CSA G40.21 480W ASTM A1008 SS Grade 50 ASTM A572 Gr.65 CSA G40.21 260W CSA G40.21 350W CSA G40.21 400W ASTM A1008 SS Grade 80 ASTM A283C
Match Breakdown
CHEMISTRY MATCH
94.1%
MECHANICAL MATCH
2.6%
OVERALL
63.6%
Specifications
Property GB/T 700 Q275B CSA G40.21 400A
Standard GB/T 700:2006 CSA G40.21-13 (R2023)
Category Structural Steel Structural Steel
C (%) <=0.21 <=0.23
Si (%) <=0.35 <=0.40
Mn (%) <=1.50 <=1.60
P (%) <=0.045 <=0.035
S (%) <=0.045 <=0.035
Cu (%) Not specified 0.20-0.40
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 Q275B CSA G40.21 400A
Tensile Strength 410-540 MPa 520-670 MPa
Yield Strength >=275 MPa 400 MPa min
Elongation >=22% 17% min
Condition Hot rolled, controlled rolled or normalized; yield up to 16 mm, elongation up to 40 mm (N/mm2 = MPa) Not specified
Impact Not specified 27J at 0°C
Typical Applications
GB/T 700 Q275B
Hot rolled structural sheets, strips, sections and bars for welding, riveting and bolting engineering
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
Key Differences
Can GB/T 700 Q275B Be Substituted With CSA G40.21 400A?
GB/T 700 Q275B and CSA G40.21 400A 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 Q275B
No active listings currently.
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)
On M-EX Right Now
GB/T 700 Q275B
0 active listings and RFQs →
CSA G40.21 400A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 700 Q275B and CSA G40.21 400A?
CSA G40.21 400A specifies Cu which is not specified for GB/T 700 Q275B.
Can GB/T 700 Q275B be substituted with CSA G40.21 400A?
GB/T 700 Q275B and CSA G40.21 400A 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.