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GOST 380 St3sp vs SAE J404 50B46

Related Material — 65% match based on chemical composition and mechanical property overlap.

GOST 380 St3sp (GOST 380-2005) and SAE J404 50B46 (SAE J404:2009) are both steel grades. GOST 380 St3sp is classified under Structural Steel, while SAE J404 50B46 is classified under Alloy Steel — a different category, which is worth noting alongside the chemistry match below. GOST 380 St3sp is typically used for structural components, welded structures, plates, construction equipment, machinery frames, rolled sections, while SAE J404 50B46 is commonly used for chemistry-only alloy steel grade; see the composition notes for product scope. SAE J404 50B46 is defined under SAE International (United States).

As per chemical composition, GOST 380 St3sp vs SAE J404 50B46 is a 68.4% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 65%.

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 GOST 19281 09G2S CSA G40.21 400A CSA G40.21 300W ASTM A283C ASTM A572 Gr.65
Match Breakdown
CHEMISTRY MATCH
68.4%
MECHANICAL MATCH
No shared data
OVERALL
65%
Specifications
Property GOST 380 St3sp SAE J404 50B46
Standard GOST 380-2005 SAE J404:2009
Category Structural Steel Alloy Steel
C (%) 0.14-0.22 0.44-0.49
Si (%) 0.15-0.30 0.15-0.35
Mn (%) 0.40-0.65 0.75-1.00
S (%) <=0.050 <=0.040
P (%) <=0.040 <=0.030
Cu (%) <=0.30 Not specified
Ni (%) <=0.30 0.20-0.35
Cr (%) <=0.30 0.20-0.35
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 SAE J404 50B46
Tensile Strength 370-490 MPa Not specified
Yield Strength >=245 MPa Not specified
Elongation >=22% Not specified
Hardness <=170 HB Not specified
Typical Applications
GOST 380 St3sp
structural components, welded structures, plates, construction equipment, machinery frames, rolled sections
SAE J404 50B46
Chemistry-only alloy steel grade; see the composition notes for product scope
Key Differences
Can GOST 380 St3sp Be Substituted With SAE J404 50B46?
GOST 380 St3sp and SAE J404 50B46 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)
SAE J404 50B46
No active listings currently.
On M-EX Right Now
GOST 380 St3sp
2 active listings and RFQs →
SAE J404 50B46
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Frequently Asked Questions
What is the difference between GOST 380 St3sp and SAE J404 50B46?
Different category: GOST 380 St3sp is Structural Steel, SAE J404 50B46 is Alloy Steel. GOST 380 St3sp specifies Cu which is not specified for SAE J404 50B46.
Can GOST 380 St3sp be substituted with SAE J404 50B46?
GOST 380 St3sp and SAE J404 50B46 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.