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GB/T 1591 Q345B vs SAE J404 1330

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

GB/T 1591 Q345B (GB/T 1591-2018) and SAE J404 1330 (SAE J404:2009) are both steel grades. GB/T 1591 Q345B is classified under Structural Steel, while SAE J404 1330 is classified under Alloy Steel — a different category, which is worth noting alongside the chemistry match below. GB/T 1591 Q345B is typically used for bridges, construction equipment, cranes, heavy structures, pressure vessels, machinery, while SAE J404 1330 is commonly used for shafts, heavy duty gears, structural components. GB/T 1591 Q345B is defined under Guobiao Standards (GB/T), originating from China, while SAE J404 1330 is defined under SAE International, originating from United States.

As per chemical composition, GB/T 1591 Q345B vs SAE J404 1330 is a 71.3% 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 GB/T 1591 Q345B:
CSA G40.21 300W CSA G40.21 480W CSA G40.21 400W GOST 19281 09G2S CSA G40.21 260W AS/NZS 3679.1 300 CSA G40.21 350W CSA G40.21 400A ASTM A1008 SS Grade 50 AS/NZS 3679.1 350 ASTM A572 Grade 50 ASTM A1008 SS Grade 80
Match Breakdown
CHEMISTRY MATCH
71.3%
MECHANICAL MATCH
No shared data
OVERALL
65%
Specifications
Property GB/T 1591 Q345B SAE J404 1330
Standard GB/T 1591-2018 SAE J404:2009
Category Structural Steel Alloy Steel
C (%) <=0.20 0.28-0.33
Si (%) <=0.50 0.15-0.35
Mn (%) 1.00-1.60 1.60-1.80
S (%) <=0.035 <=0.040
P (%) <=0.035 <=0.030
V (%) <=0.20 Not specified
Nb (%) <=0.07 Not specified
Ti (%) <=0.20 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 Q345B SAE J404 1330
Tensile Strength 470-630 MPa Not specified
Yield Strength >=345 MPa Not specified
Elongation >=21% Not specified
Impact Energy >=34 J Not specified
Typical Applications
GB/T 1591 Q345B
bridges, construction equipment, cranes, heavy structures, pressure vessels, machinery
SAE J404 1330
Shafts, heavy duty gears, structural components
Key Differences
Can GB/T 1591 Q345B Be Substituted With SAE J404 1330?
GB/T 1591 Q345B and SAE J404 1330 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 Q345B
Plate → (2 listings)
Thickness: 10–10 mm (0.39–0.39 in)
Width: 1500–1500 mm (59.06–59.06 in)
Length: 3800–4000 mm (149.61–157.48 in)
SAE J404 1330
Round Bar → (3 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 5000–6100 mm (196.85–240.16 in)
On M-EX Right Now
GB/T 1591 Q345B
2 active listings and RFQs →
SAE J404 1330
3 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 1591 Q345B and SAE J404 1330?
Different category: GB/T 1591 Q345B is Structural Steel, SAE J404 1330 is Alloy Steel. GB/T 1591 Q345B specifies V, Nb, Ti which are not specified for SAE J404 1330.
Can GB/T 1591 Q345B be substituted with SAE J404 1330?
GB/T 1591 Q345B and SAE J404 1330 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.