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GB/T 1591 Q355C vs CSA G40.21 480W

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

GB/T 1591 Q355C (GB/T 1591:2018) and CSA G40.21 480W (CSA G40.21-13 (R2023)) are both steel grades. Both fall under the Structural Steel category. GB/T 1591 Q355C is typically used for general structure for engineering (plates, strips, bars and sections), while CSA G40.21 480W is commonly used for heavy cranes, offshore structures, high-rise building frames, pressure vessels, heavy mining equipment.. GB/T 1591 Q355C is defined under Guobiao Standards (GB/T), originating from China, while CSA G40.21 480W is defined under Canadian Standards Association (CSA), originating from Canada.

As per chemical composition, GB/T 1591 Q355C vs CSA G40.21 480W is a 78.3% match. As per mechanical properties, the match is 6.3%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With GB/T 1591 Q355C:
CSA G40.21 400A
Other Structural Steel Grades to Compare With GB/T 1591 Q355C:
GOST 19281 09G2S CSA G40.21 260W AS/NZS 3679.1 300 CSA G40.21 300W AS/NZS 3679.1 350 CSA G40.21 350W CSA G40.21 400W ASTM A1008 SS Grade 50 ASTM A1008 SS Grade 80 ASTM A283C ASTM A572 Gr.65
Match Breakdown
CHEMISTRY MATCH
78.3%
MECHANICAL MATCH
6.3%
OVERALL
35%
Specifications
Property GB/T 1591 Q355C CSA G40.21 480W
Standard GB/T 1591:2018 CSA G40.21-13 (R2023)
Category Structural Steel Structural Steel
C (%) <=0.20 max 0.23
Si (%) <=0.55 max 0.5
Mn (%) <=1.60 max 1.7
P (%) <=0.030 max 0.035
S (%) <=0.030 max 0.035
Cr (%) <=0.30 Not specified
Ni (%) <=0.30 Not specified
Cu (%) <=0.40 Not specified
N (%) <=0.012 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 GB/T 1591 Q355C CSA G40.21 480W
Tensile Strength 470-630 MPa 590-790 MPa
Yield Strength >=355 MPa 480 MPa min
Elongation >=22% Not specified
Condition Hot-rolled (as-rolled), nominal thickness or diameter up to 16 mm for yield; tensile strength for up to 100 mm; elongation longitudinal, up to 40 mm Not specified
Typical Applications
GB/T 1591 Q355C
General structure for engineering (plates, strips, bars and sections)
CSA G40.21 480W
Heavy cranes, offshore structures, high-rise building frames, pressure vessels, heavy mining equipment.
Key Differences
Can GB/T 1591 Q355C Be Substituted With CSA G40.21 480W?
GB/T 1591 Q355C and CSA G40.21 480W 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 1591 Q355C
No active listings currently.
CSA G40.21 480W
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2900–3000 mm (114.17–118.11 in)
On M-EX Right Now
GB/T 1591 Q355C
0 active listings and RFQs →
CSA G40.21 480W
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 1591 Q355C and CSA G40.21 480W?
GB/T 1591 Q355C specifies Cr, Ni, Cu, N which are not specified for CSA G40.21 480W.
Can GB/T 1591 Q355C be substituted with CSA G40.21 480W?
GB/T 1591 Q355C and CSA G40.21 480W 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.