AISI/SAE 4340 Alloy Steel Bar

AISI 4340 carbon steel bar is made of a heat treatable low alloy steel containing chromium, nickel and molybdenum. It has high toughness and high strength under heat treatment conditions.

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Carbon Steel Round Bar

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Product Details

AISI 4340 is a commonly used alloy steel with high strength, high toughness, good wear resistance and corrosion resistance. Its moderate carbon content gives it good machinability and weldability. In addition, it also contains appropriate amounts of chromium, nickel and other elements, which further improves its performance. At the same time, its toughness and ductility are also quite good, and it can maintain good performance even in both high or low temperature environments. Due to the excellent physical and mechanical properties of 4340 steel, 4340 steel bars are also widely used in equipment manufacturing in corrosive environments such as petroleum, chemical industry, and ships.

Product Name	Carbon Steel Bar
Diameter	5.0mm-800mm
Length	5800,6000 or customized
Material	S235JR,S275JR,S355JRS355K2,A36,SS400,Q235,Q355,C45,ST37,ST52,4140,4130,4330,etc
Surface	Black skin，Bright，etc
Technique	Hot rolling, Cold drawing, Hot forging
Application	Widely used in machinery manufacturing, building structures, automobile manufacturing, chemical industry, shipbuilding, etc.
Standard	GB,GOST,ASTM,AISI,JIS,BS,DIN,EN
Delivery time	Within 7-15 workdays after receiving deposit or L/C
Export packing	Waterproof paper, and steel strip packed. Standard Export Seaworthy Package.Suit for all kinds of transport,or as required
Payment	T/T L/C, Western Union etc.

Chemical Composition

Grade	Mn	S	C	P	Si	Cr	Ni
AISI 4340	0.60-0.80	0.035	0.38-0.43	0.04	0.15-0.35	0.70-0.90	1.65-2.00

Mechanical Properties

Grade	Tensile Strength kg f/mm2	Yield Strength kg f/mm2	Elongation %	Hardness HB
AISI 4340	≥ 100	≥ 90	≥ 16	293-352

Scope of Application

AISI 4340 alloy steel is mainly used for power transmission gears and shafts, aircraft landing gear and other structural parts.

Carbon Steel Round Bar