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GB/T 699 65 vs SAE J404 50B46

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

GB/T 699 65 (GB/T 699:2015) and SAE J404 50B46 (SAE J404:2009) are both steel grades. GB/T 699 65 is classified under Carbon Steel, while SAE J404 50B46 is classified under Alloy Steel — a different category, which is worth noting alongside the chemistry match below. GB/T 699 65 is typically used for hot-rolled or forged quality carbon structural steel bars up to 250 mm, while SAE J404 50B46 is commonly used for chemistry-only alloy steel grade; see the composition notes for product scope. GB/T 699 65 is defined under Guobiao Standards (GB/T), originating from China, while SAE J404 50B46 is defined under SAE International, originating from United States.

As per chemical composition, GB/T 699 65 vs SAE J404 50B46 is a 68.7% 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 699 65:
BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A10 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32 BS 970 (Part 1) 060A40
Match Breakdown
CHEMISTRY MATCH
68.7%
MECHANICAL MATCH
No shared data
OVERALL
65%
Specifications
Property GB/T 699 65 SAE J404 50B46
Standard GB/T 699:2015 SAE J404:2009
Category Carbon Steel Alloy Steel
C (%) 0.62-0.70 0.44-0.49
Si (%) 0.17-0.37 0.15-0.35
Mn (%) 0.50-0.80 0.75-1.00
P (%) <=0.035 <=0.030
S (%) <=0.035 <=0.040
Cr (%) <=0.25 0.20-0.35
Ni (%) <=0.30 0.20-0.35
Cu (%) <=0.25 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 699 65 SAE J404 50B46
Tensile Strength >=695 MPa Not specified
Yield Strength >=410 MPa Not specified
Elongation >=10% Not specified
Hardness <=255 HB (as delivered, not heat treated) Not specified
Condition Normalized 25 mm sample blank, bars up to 80 mm; hardness for delivery state Not specified
Typical Applications
GB/T 699 65
Hot-rolled or forged quality carbon structural steel bars up to 250 mm
SAE J404 50B46
Chemistry-only alloy steel grade; see the composition notes for product scope
Key Differences
Can GB/T 699 65 Be Substituted With SAE J404 50B46?
GB/T 699 65 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.
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GB/T 699 65
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Frequently Asked Questions
What is the difference between GB/T 699 65 and SAE J404 50B46?
Different category: GB/T 699 65 is Carbon Steel, SAE J404 50B46 is Alloy Steel. GB/T 699 65 specifies Cu which is not specified for SAE J404 50B46.
Can GB/T 699 65 be substituted with SAE J404 50B46?
GB/T 699 65 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.