Post Stock Login Register

GB/T 3077 15CrMo vs SAE J404 4145

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

GB/T 3077 15CrMo (GB/T 3077:2015) and SAE J404 4145 (SAE J404:2009) are both steel grades. Both fall under the Alloy Steel category. GB/T 3077 15CrMo is typically used for used for boiler tubes, pressure vessels, steam pipes, petrochemical equipment, flanges, and high-temperature fasteners., while SAE J404 4145 is commonly used for chemistry-only alloy steel grade; see the composition notes for product scope. GB/T 3077 15CrMo is defined under Guobiao Standards (GB/T), originating from China, while SAE J404 4145 is defined under SAE International, originating from United States.

As per chemical composition, GB/T 3077 15CrMo vs SAE J404 4145 is a 73% 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 69.9%.

Frequently Compared With GB/T 3077 15CrMo:
NF A35-565 100C6 IS 1570 (Part 7) 12Cr4Mo5H IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 7) 10Cr36Mo10H IS 11169 (Part 1) 12Cr4Mo2 GOST 4543 12HN3A IS 1570 (Part 4) 10Cr20Mo6
Match Breakdown
CHEMISTRY MATCH
73%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property GB/T 3077 15CrMo SAE J404 4145
Standard GB/T 3077:2015 SAE J404:2009
Category Alloy Steel Alloy Steel
C (%) 0.12-0.18 0.43-0.48
Si (%) 0.17-0.37 0.15-0.35
Mn (%) 0.40-0.70 0.75-1.00
Cr (%) 0.80-1.10 0.80-1.10
Mo (%) 0.40-0.55 0.15-0.25
P (%) <=0.030 <=0.030
S (%) <=0.030 <=0.040
Cu (%) <=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 GB/T 3077 15CrMo SAE J404 4145
Tensile Strength >=440 MPa Not specified
Yield Strength >=295 MPa Not specified
Elongation >=22% Not specified
Hardness <=179 HB Not specified
Condition Quenched and tempered, test sample 30 mm; hardness is for bars delivered annealed or high temperature tempered Not specified
Typical Applications
GB/T 3077 15CrMo
Used for boiler tubes, pressure vessels, steam pipes, petrochemical equipment, flanges, and high-temperature fasteners.
SAE J404 4145
Chemistry-only alloy steel grade; see the composition notes for product scope
Key Differences
Can GB/T 3077 15CrMo Be Substituted With SAE J404 4145?
GB/T 3077 15CrMo and SAE J404 4145 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 3077 15CrMo
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5700–5700 mm (224.41–224.41 in)
SAE J404 4145
No active listings currently.
On M-EX Right Now
GB/T 3077 15CrMo
2 active listings and RFQs →
SAE J404 4145
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 3077 15CrMo and SAE J404 4145?
GB/T 3077 15CrMo specifies Cu which is not specified for SAE J404 4145.
Can GB/T 3077 15CrMo be substituted with SAE J404 4145?
GB/T 3077 15CrMo and SAE J404 4145 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.