High quality special steel supplier.Old rev.
  • Certified Company

  • Certified Company

    ISO 9001:2008
  • R&D Production

    In China


K640 material is Age hardening type Nickel base alloy.

Chemical composition of K640, K640 mechanical properties, K640 datasheet, K640 equivalent grade, Heat treatment and temperature process of K640.

K640 property sheet

K640 Spec.

Related Materials

Chemical Composition of K640

C 0.45-0.55
Si Max 1
Mn Max 1
P Max 0.04
S Max 0.04
Cr 24.5-26.5
Ni 9.50-11.5
W 7.00-8.00
Co Balance

Mechanical Properties of K640

Rp0.2 (MPa) 833 (≥)
Rm (MPa) 597 (≥)
AKV (J) 42
A (%) 34
Z (%) 22
Hardness HBW 144

K640 shape and dimensions

K640 Round bar: 1mm-800mm
K640 Square bar: 10mm * 10mm-600mm *600mm
K640 Flat bar: Thickness:8mm-800mm Width:10mm to 1500mm
K640 Sheet or Plate: Thickness:3mm-80mm Width:1.5mm to 1500mm
K640 Strip or Coil: Thickness:0.1mm-3mm Width:1.5mm-1500mm
K640 Forgings: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes