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GOST 380 St3sp vs GOST 19281 09G2S

Minimal Match — 52.7% match based on chemical composition and mechanical property overlap.

GOST 380 St3sp (GOST 380-2005) and GOST 19281 09G2S (GOST 19281-2014) are both steel grades. Both fall under the Structural Steel category. GOST 380 St3sp is typically used for structural components, welded structures, plates, construction equipment, machinery frames, rolled sections, while GOST 19281 09G2S is commonly used for used for bridges, pressure vessels, pipelines, structural frames, and heavy equipment components..

As per chemical composition, GOST 380 St3sp vs GOST 19281 09G2S is a 79.1% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 52.7%.

Frequently Compared With GOST 380 St3sp:
AS/NZS 3679.1 300 CSA G40.21 260W AS/NZS 3679.1 350 CSA G40.21 400W CSA G40.21 350W ASTM A1008 SS Grade 50 ASTM A1008 SS Grade 80 CSA G40.21 400A CSA G40.21 300W ASTM A283C ASTM A572 Gr.65 CSA G40.21 480W
Match Breakdown
CHEMISTRY MATCH
79.1%
MECHANICAL MATCH
0%
OVERALL
52.7%
Specifications
Property GOST 380 St3sp GOST 19281 09G2S
Standard GOST 380-2005 GOST 19281-2014
Category Structural Steel Structural Steel
C (%) 0.14-0.22 0.07-0.12
Si (%) 0.15-0.30 0.5-0.8
Mn (%) 0.40-0.65 1.3-1.7
S (%) <=0.050 0.04 max
P (%) <=0.040 0.035 max
Cu (%) <=0.30 0.3 max
Ni (%) <=0.30 0.3 max
Cr (%) <=0.30 0.3 max
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 St3sp GOST 19281 09G2S
Tensile Strength 370-490 MPa 490-640 MPa
Yield Strength >=245 MPa 345 MPa min
Elongation >=22% 21% min
Hardness <=170 HB 140-190 HB
Typical Applications
GOST 380 St3sp
structural components, welded structures, plates, construction equipment, machinery frames, rolled sections
GOST 19281 09G2S
Used for bridges, pressure vessels, pipelines, structural frames, and heavy equipment components.
Can GOST 380 St3sp Be Substituted With GOST 19281 09G2S?
GOST 380 St3sp and GOST 19281 09G2S 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 St3sp
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 3900–3900 mm (153.54–153.54 in)
GOST 19281 09G2S
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 2900–3800 mm (114.17–149.61 in)
On M-EX Right Now
GOST 380 St3sp
2 active listings and RFQs →
GOST 19281 09G2S
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GOST 380 St3sp and GOST 19281 09G2S?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GOST 380 St3sp be substituted with GOST 19281 09G2S?
GOST 380 St3sp and GOST 19281 09G2S 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.