AISI 4340 alloy steel is a heat treatable low alloy steel containing chromium, nickel and molybdenum. It has high toughness and high strength under heat treatment conditions.
Product Parameters
Product Name | AISI/SAE 4340 Carbon Steel Bar | |||
Standard | EN/DIN/JIS/ASTM/BS/ASME/AISI etc. | |||
Common round barSpecifications | 3.0-50.8 mm,Over 50.8-300mm | |||
Flat steelCommonSpecifications | 6.35x12.7mm,6.35x25.4mm,12.7x25.4mm | |||
Hexagon BarCommonSpecifications | AF5.8mm-17mm | |||
Square BarCommonSpecifications | AF2mm-14mm,AF6.35mm,9.5mm,12.7mm,15.98mm,19.0mm,25.4mm | |||
Length | 1-6Meters,Size accept custom | |||
Diameter(Mm) | hot rollinground bar | 25-600 | cold rollingSquare Bar | 6-50.8 |
hot rollingSquare Bar | 21-54 | cold rollingHexagon Bar | 9.5-65 | |
cold rollinground bar | 6-101.6 | Forged Rebar | 200-1000 | |
SurfaceProcess | Bright, polished, black | |||
Other Services | Machining(CNC), centerless grinding (CG), heat treatment, annealing, pickling, polishing, rolling, forging, cutting, bending, small machining, 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 Strengthkgf/mm2 | Yield strengthkgf/mm2 | Elongation% | HardnessHB |
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.
