• Hardox, Bisalloy, Creusabro, XAR, Quard Sumihard, Fora, Raex,JFE Everhard
  • Plat Boiler,A283Gr.C,SS400,Plat Kapal,A36,BKI,SM490,S355J
  • 3Cr12,210,304/304L,AISI 310,316/316L,403, 410,430,Durinox
  • AISI 1045,AISI 4140,AISI 4340,SCM415,SCM435,SCM440,DIN 42CrMo4,DIN 34NiCrMo6,
  • S45C,S50C,VCL140,VCN150,ASSAB,Bohler, Thyssenkrupp
  • SKD11, SKD61, SKS3, SKT4, HSS, Tungsteen Carbide
  • H-Beam,I-Beam,WF Beam,UNP,C-Channel,Besi Siku,King Cross, T-Section
  • Toko Besi,Jual Besi Baja,harga Plat dan RounBar

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AISI4340 Steel Round Bar

High Tensile Nickel Chrome Steel

Steel AISI 4340


It has high hardenability and is capable of giving good properties in large sections. It is relatively free from temper brittleness and retains useful machinability at relatively high hardness.

Equivalent AISI 4340
Thyssenkrupp 6582, DIN 34NiCrMo6, ASSAB 705, VCN 150, JIS SNCM 439, EN 1.6582, EN 1.6562, HQ 705

Round bar
Outer Diameter (OD) : 20mm - 300mm
Length: 1000mm - 9000mm

Chemical Composition

0.38 - 0.430.20 - 0.350.60 - 0.800.40 Max0.04 Max1.65 - 2.000.70 - 0.900.20 -0.30

Mechanical Properties

AISI 4340
Tensile Strength (MPa) 745
Yield Strength (MPa) 470
Elongation at break (%) 22
Hardness (HB) 217
Elastic modulus (GPa) 190-210
Bulk modulus (GPa) 140
Shear modulus (GPa) 80
Poisson's ratio 0.27-0.30
Supplied Condition Preharden

Physical Properties

AISI 4340
Density (×1000 kg/m3) : 7.85
Melting point (°C) : 1427
Thermal Conductivity (@ 100°C) (W/m-K) 44.5
Thermal expansion co-efficient (┬Ám/m°C) 12.3


Automotive crankshafts and rear axle shafts, aircrafts crankshafts, aircraft landing gear, Connecting Rods, Propeller Hubs, Gears, Drive shafts, Landing gear parts and heavy duty parts of rock drill, power transmission gears and shafts, and other structural parts

Related Steel:

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