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GOST 380 St3ps vs CSA G40.21 300W

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

GOST 380 St3ps (GOST 380-2005) and CSA G40.21 300W (CSA G40.21-13 (R2023)) are both steel grades. Both fall under the Structural Steel category. GOST 380 St3ps is typically used for structural steelwork, welded assemblies, construction materials, plates, bars, channels, while CSA G40.21 300W is commonly used for structural fabrication,bridges,buildings,machinery frames,general construction,welded structures. CSA G40.21 300W is defined under Canadian Standards Association (CSA) (Canada).

As per chemical composition, GOST 380 St3ps vs CSA G40.21 300W is a 67.3% match. As per mechanical properties, the match is 5.3%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With GOST 380 St3ps:
ASTM A283C AS/NZS 3679.1 300 AS/NZS 3679.1 350 ASTM A572 Gr.65 CSA G40.21 400W CSA G40.21 350W ASTM A1008 SS Grade 80 CSA G40.21 260W CSA G40.21 480W GOST 19281 09G2S CSA G40.21 400A ASTM A1008 SS Grade 50
Match Breakdown
CHEMISTRY MATCH
67.3%
MECHANICAL MATCH
5.3%
OVERALL
35%
Specifications
Property GOST 380 St3ps CSA G40.21 300W
Standard GOST 380-2005 CSA G40.21-13 (R2023)
Category Structural Steel Structural Steel
C (%) 0.14-0.22 <=0.23
Si (%) 0.05-0.15 Not specified
Mn (%) 0.40-0.65 <=1.50
S (%) <=0.050 <=0.050
P (%) <=0.040 <=0.040
Cu (%) <=0.30 Not specified
Ni (%) <=0.30 Not specified
Cr (%) <=0.30 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 GOST 380 St3ps CSA G40.21 300W
Tensile Strength 370-490 MPa 450-620 MPa
Yield Strength >=235 MPa 300 MPa min
Elongation >=22% 20-23 %
Hardness <=170 HB Not specified
Typical Applications
GOST 380 St3ps
structural steelwork, welded assemblies, construction materials, plates, bars, channels
CSA G40.21 300W
structural fabrication,bridges,buildings,machinery frames,general construction,welded structures
Key Differences
Can GOST 380 St3ps Be Substituted With CSA G40.21 300W?
GOST 380 St3ps 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
GOST 380 St3ps
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 3200–4400 mm (125.98–173.23 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
GOST 380 St3ps
2 active listings and RFQs →
CSA G40.21 300W
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GOST 380 St3ps and CSA G40.21 300W?
GOST 380 St3ps specifies Si, Cu, Ni, Cr which are not specified for CSA G40.21 300W.
Can GOST 380 St3ps be substituted with CSA G40.21 300W?
GOST 380 St3ps 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.