AISI 4340 Steel Round Bar Listings

Grade Details

Grade	AISI 4340
Standard	AISI
Description	Nickel chrome molybdenum high strength alloy steel
Applications	Aircraft parts, heavy duty gears, crankshafts, high tensile bolts

Equivalent Grades

Grade	Standard	Region	Live Round Bar on M-EX
EN 10083-3 34CrNiMo6	EN 10083-3	Europe	3 listings, 0 RFQs →
BS 970 EN24	BS 970	UK	8 listings, 18 RFQs →
JIS G4103 SNCM439	JIS G4103	Japan	3 listings, 0 RFQs →
SAE J404 4340	SAE J404	USA	11 listings, 14 RFQs →
SAE J404 E4340	SAE J404	USA	No activity yet
SAE J404 4340	SAE J404	USA	No activity yet

Market Snapshot

7D Offer Price

● 0.0%

15D Offer Price

● 0.0%

30D Offer Price

▼ -0.5%

Supply & Demand: Round Bar See Full Supply & Demand →

AISI 4340 Round Bar Deep Supply

Active AISI 4340 Round Bar Listings (For Sale) 3

AISI 4340 Round Bar

4.900 MT · Closes 29 Oct 2026

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AISI 4340 Round Bar

2.700 MT · Closes 30 Oct 2026

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AISI 4340 Round Bar

3.100 MT · Closes 30 Oct 2026

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No open buyer requirements for AISI 4340 Round Bar at this time.

Related: All Round Bar grades · Alloy Steel