4340 steel is chromium molybdenum alloy steel. it has high strength and toughness, good stability od harden-ability and anti-overheating, good high tensile strength with shock resistance.

It is usually used in making gears, shafts, piston etc. Like the high wear-resistance parts which are used in plane and cars etc.

  • Chromium molybdenum alloy steel
  • High strength and toughness
  • Good stability of harden-ability and anti-overheating;
  • Good high tensile strength with shock resistance
4340 INVENTORY INFORMATION
  • Heavy machinery and high-load of shaft;
  • Rotor shaft and blades;
  • Special performance requirements of the vital parts after nit-riding treatment.
GradeC
SiMnPSCrMoNi
SNCM4390.36-0.430.15-0.350.60-0.90≤0.025≤0.0250.60-1.000.15-0.301.60-2.00
43400.38-0.43
0.15-0.35
0.60-0.80≤0.035≤0.0400.70-0.900.20-0.301.65-2.00
40CrNiMoA0.37-0.440.17-0.370.50-0.80≤0.025≤0.0250.60-0.900.15-0.251.25-1.65
36CrNiMo40.38-0.43
0.15-0.35
0.60-0.80≤0.035≤0.0400.90-1.200.15-0.300.90-1.20

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Sizes:

  • 2mm to 1200mm
  • We can accept customized sizes

Delivery Time:

  • 7-10 working days for steel in stock.
  • 20-60 working days for direct production based on the quantity.

Sizes:

  • 8mm to 1200mm
  • We can accept customized sizes

Delivery Time:

  • 7-10 working days for steel in stock.
  • 20-60 working days for direct production based on the quantity.
ST 52-3 Steel Round Bar

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