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SAE J404 4340 vs EN 10028-2 10CrMo9-10

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

SAE J404 4340 (SAE J404:2009) and EN 10028-2 10CrMo9-10 (EN 10028-2:2017) are both steel grades. Both fall under the Alloy Steel category. SAE J404 4340 is typically used for aircraft parts, heavy duty gears, crankshafts, while EN 10028-2 10CrMo9-10 is commonly used for flat products for pressure purposes. SAE J404 4340 is defined under SAE International, originating from United States, while EN 10028-2 10CrMo9-10 is defined under European Standard (EN), originating from Europe.

As per chemical composition, SAE J404 4340 vs EN 10028-2 10CrMo9-10 is a 51.8% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With SAE J404 4340:
GB/T 3077 12Cr2Ni4A NF A35-565 100C6 GOST 4543 12HN3A UNI 11234 100Cr6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
51.8%
MECHANICAL MATCH
No shared data
OVERALL
35%
Specifications
Property SAE J404 4340 EN 10028-2 10CrMo9-10
Standard SAE J404:2009 EN 10028-2:2017
Category Alloy Steel Alloy Steel
C (%) 0.38-0.43 0.08-0.14
Cr (%) 0.70-0.90 2.00-2.50
Mn (%) 0.60-0.80 0.40-0.80
Mo (%) 0.20-0.30 0.90-1.10
Ni (%) 1.65-2.00 Not specified
P (%) <=0.030 <=0.020
S (%) <=0.040 <=0.010
Si (%) 0.15-0.35 <=0.50
N (%) Not specified <=0.012
Cu (%) Not specified <=0.30
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property SAE J404 4340 EN 10028-2 10CrMo9-10
Tensile Strength Not specified 480-630 MPa
Yield Strength Not specified >=310 MPa
Elongation Not specified >=18%
Condition Not specified Usual delivery condition normalized and tempered (+NT), nominal thickness up to 16 mm; transverse direction, Yield Strength is ReH, Elongation is A
Typical Applications
SAE J404 4340
Aircraft parts, heavy duty gears, crankshafts
EN 10028-2 10CrMo9-10
Flat products for pressure purposes
Key Differences
Can SAE J404 4340 Be Substituted With EN 10028-2 10CrMo9-10?
SAE J404 4340 and EN 10028-2 10CrMo9-10 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
SAE J404 4340
Round Bar → (25 listings)
Diameter: 50–100 mm (1.97–3.94 in)
Length: 3800–7000 mm (149.61–275.59 in)
Forging → (4 listings)
Diameter: 150–200 mm (5.91–7.87 in)
Length: 500–1500 mm (19.69–59.06 in)
Flat Bar → (3 listings)
Thickness: 30–30 mm (1.18–1.18 in)
Width: 120–120 mm (4.72–4.72 in)
Length: 2500–3000 mm (98.43–118.11 in)
EN 10028-2 10CrMo9-10
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On M-EX Right Now
SAE J404 4340
32 active listings and RFQs →
EN 10028-2 10CrMo9-10
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Frequently Asked Questions
What is the difference between SAE J404 4340 and EN 10028-2 10CrMo9-10?
SAE J404 4340 specifies Ni which is not specified for EN 10028-2 10CrMo9-10. EN 10028-2 10CrMo9-10 specifies N, Cu which are not specified for SAE J404 4340.
Can SAE J404 4340 be substituted with EN 10028-2 10CrMo9-10?
SAE J404 4340 and EN 10028-2 10CrMo9-10 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.