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GB/T 1591 Q420NE vs CSA G40.21 300W

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

GB/T 1591 Q420NE (GB/T 1591:2018) and CSA G40.21 300W (CSA G40.21-13 (R2023)) are both steel grades. Both fall under the Structural Steel category. GB/T 1591 Q420NE is typically used for general structure for engineering (plates, strips, bars and sections), while CSA G40.21 300W is commonly used for structural fabrication,bridges,buildings,machinery frames,general construction,welded structures. GB/T 1591 Q420NE 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 1591 Q420NE vs CSA G40.21 300W is a 54.2% match. As per mechanical properties, the match is 14.5%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With GB/T 1591 Q420NE:
CSA G40.21 400W CSA G40.21 480W
Other Structural Steel Grades to Compare With GB/T 1591 Q420NE:
GOST 19281 09G2S CSA G40.21 260W AS/NZS 3679.1 300 AS/NZS 3679.1 350 CSA G40.21 350W CSA G40.21 400A ASTM A1008 SS Grade 50 ASTM A1008 SS Grade 80 ASTM A283C ASTM A572 Gr.65
Match Breakdown
CHEMISTRY MATCH
54.2%
MECHANICAL MATCH
14.5%
OVERALL
35%
Specifications
Property GB/T 1591 Q420NE CSA G40.21 300W
Standard GB/T 1591:2018 CSA G40.21-13 (R2023)
Category Structural Steel Structural Steel
C (%) <=0.20 <=0.23
Si (%) <=0.60 Not specified
Mn (%) 1.00-1.70 <=1.50
P (%) <=0.025 <=0.040
S (%) <=0.020 <=0.050
Nb (%) 0.01-0.05 Not specified
V (%) 0.01-0.20 Not specified
Ti (%) 0.006-0.05 Not specified
Cr (%) <=0.30 Not specified
Ni (%) <=0.80 Not specified
Cu (%) <=0.40 Not specified
Mo (%) <=0.10 Not specified
N (%) <=0.025 Not specified
Al (%) >=0.015 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 Q420NE CSA G40.21 300W
Tensile Strength 520-680 MPa 450-620 MPa
Yield Strength >=420 MPa 300 MPa min
Elongation >=19% 20-23 %
Condition Normalized or normalizing rolled, nominal thickness or diameter up to 16 mm (tensile strength: up to 100 mm) Not specified
Typical Applications
GB/T 1591 Q420NE
General structure for engineering (plates, strips, bars and sections)
CSA G40.21 300W
structural fabrication,bridges,buildings,machinery frames,general construction,welded structures
Key Differences
Can GB/T 1591 Q420NE Be Substituted With CSA G40.21 300W?
GB/T 1591 Q420NE 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 1591 Q420NE
No active listings currently.
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 1591 Q420NE
0 active listings and RFQs →
CSA G40.21 300W
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 1591 Q420NE and CSA G40.21 300W?
GB/T 1591 Q420NE specifies Si, Nb, V, Ti which are not specified for CSA G40.21 300W.
Can GB/T 1591 Q420NE be substituted with CSA G40.21 300W?
GB/T 1591 Q420NE 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.