Post Stock Login Register

SAE J404 4140 / SAE 4140 Steel - Specifications & Listings

SAE J404 4140: Chrome molybdenum alloy steel, high strength and toughness

Forms: Round Bar Square Bar Flat Bar Hex Bar Forging Category: Alloy Steel
Grade Details
GradeSAE J404 4140 / SAE 4140
StandardSAE J404
DescriptionChrome molybdenum alloy steel, high strength and toughness
ApplicationsGears, shafts, dies, bolts, crankshafts
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
42CrMo4 DIN/EN Europe 21 listings, 22 RFQs →
EN19 BS970 UK 19 listings, 15 RFQs →
SCM440 JIS Japan 0 listings, 3 RFQs →
Market Snapshot

Market balanced

Daily refresh · 07 Aug 2026

See Full Price Gap →
7D Offer Price
▲ +0.3%
15D Offer Price
▲ +0.3%
30D Offer Price
▲ +0.3%
Supply & Demand by FormSee Full Supply & Demand →
Round Bar →
Balanced
Hex Bar →
Demand outpacing supply
Flat Bar →
Balanced
Forging →
Supply, no demand
Square Bar →
Supply, no demand
Chemical Composition (%)
C Mn Cr Mo Si
0.38–0.43 0.75–1.00 0.80–1.10 0.15–0.25 0.15–0.35
Mechanical Properties
condition Quenched & Tempered
Tensile Strength 850–1000 MPa
Yield Strength ≥680 MPa
Elongation ≥13%
Hardness 248–302 HB
Typical Available Sizes
Round Bar 16mm–350mm dia
Flat Bar 20×8mm–250×75mm
Hex Bar 19mm–100mm A/F
Sizes are indicative. Contact seller for exact availability.
Processing:

Active SAE J404 4140 / SAE 4140 Listings on M-EX (For Sale)

SAE J404 4140 / SAE 4140 Round Bar
6.600 MT
View Listing
SAE J404 4140 / SAE 4140 Round Bar
5.500 MT
View Listing
SAE J404 4140 / SAE 4140 Hex Bar
0.500 MT
View Listing
SAE J404 4140 / SAE 4140 Flat Bar
1.400 MT
View Listing
SAE J404 4140 / SAE 4140 Round Bar
1.900 MT
View Listing
SAE J404 4140 / SAE 4140 Round Bar
3.500 MT
View Listing
SAE J404 4140 / SAE 4140 Flat Bar
1.900 MT
View Listing
SAE J404 4140 / SAE 4140 Round Bar
2.200 MT
View Listing
SAE J404 4140 / SAE 4140 Flat Bar
1.400 MT
View Listing
SAE J404 4140 / SAE 4140 Round Bar
0.800 MT
View Listing
SAE J404 4140 / SAE 4140 Round Bar
4.900 MT
View Listing
SAE J404 4140 / SAE 4140 Round Bar
1.300 MT
View Listing
SAE J404 4140 / SAE 4140 Round Bar
5.400 MT
View Listing
SAE J404 4140 / SAE 4140 Hex Bar
0.700 MT
View Listing
SAE J404 4140 / SAE 4140 Hex Bar
1.500 MT
View Listing

Buyer RFQs for SAE J404 4140 / SAE 4140

+ Post an RFQ for this grade
SAE J404 4140 / SAE 4140 Flat Bar
2.000 MT
View RFQ
SAE J404 4140 / SAE 4140 Round Bar
6.800 MT
View RFQ
SAE J404 4140 / SAE 4140 Round Bar
4.600 MT
View RFQ
SAE J404 4140 / SAE 4140 Round Bar
4.500 MT
View RFQ
SAE J404 4140 / SAE 4140 Round Bar
2.100 MT
View RFQ
SAE J404 4140 / SAE 4140 Hex Bar
4.700 MT
View RFQ
SAE J404 4140 / SAE 4140 Flat Bar
1.500 MT
View RFQ
SAE J404 4140 / SAE 4140 Round Bar
8.700 MT
View RFQ
SAE J404 4140 / SAE 4140 Hex Bar
3.600 MT
View RFQ
SAE J404 4140 / SAE 4140 Hex Bar
2.000 MT
View RFQ
SAE J404 4140 / SAE 4140 Round Bar
2.900 MT
View RFQ
SAE J404 4140 / SAE 4140 Flat Bar
1.900 MT
View RFQ
SAE J404 4140 / SAE 4140 Hex Bar
2.900 MT
View RFQ
SAE J404 4140 / SAE 4140 Round Bar
2.100 MT
View RFQ
SAE J404 4140 / SAE 4140 Round Bar
4.300 MT
View RFQ