AISI 4140 Hot rolled steel bar, AISI 4140 Forged steel bar

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11-May-2024

AISI 4140 Steel round bar under A519-06 standard, and AISI 4140 Steel round bar has high tensile strength and toughness values features, in particular in medium and large cross sections in the quenched and tempered condition. The Molybdenum additions prevent the steel from being susceptible to temper brittleness, Surface hardenable.

AISI 4140 Hot rolled steel bar

AISI 4140 hot rolled round bar size:
Common diameter: 16mm to 70mm
Common diameter: 80mm to 1200mm
Straightness: 3mm/1000mm
Tolerance for the steel bar:
Diameter tolerance: 0~5mm， Length tolerance：0~20mm

Package: standard seaworthy packing or as customer required
Delivery condition for 4140 steel bar:
Hot forged +Normalized+rough turned Q/T:Quench+ Temper Annealing
EAF ARC FURNACE + LF REFINING+ VD + FORGING (DOUBLE) + FIXED LENGTH + SEP1921C/c TESTING

AISI 4140 steel round bar Chemical composition

Grade	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
4140	0.38~0.43	0.15-0.35	0.75~1.00	0.04	0.04	0.8~1.10	~	~	0.15~0.25

AISI 4140 Steel round bar mechanical property

Tensile strength	Yieldd strength	Elongation
σb (MPa) Min	σb (MPa) Min	δ5 (%)Min
855(120)	621(90)	20

AISI 4140 forged round bar application:
4140 is the most commonly used of the high tensile steels with a wide range of applications in automotive, Gear and Engine construction, Crankshafts, Steering knuckles, Connecting rods, Spindles, Intermediate gears, Pump and Gear shafts, Axles, Nuts and Bolts.

KUNFENG Co.,ltd is professional steel round bar supplier. We are a large stockist of steel bar in China. We have almost 750 ton of AISI 4140 steel bar in stock. The stock AISI 4140 steel round bar size ranges fromΦ80 to Φ700. The common length for 4140 steel bar is 3000 to 7000mm. And the price is competitive. If your size can be picked in our warehouse, we can transport in the loading port in 3 days. So please be free to contact us if you require steel bar.

Tags: ASTM4130, 1340, 1330