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  • Name: 40Cr / 41Cr4 / aisi5140 / sae5140 / SCr440 alloy steel
  • Number: 018
  • Uplaod time: 2017-03-16
  • Views : 105

  • 40Cr material is one jind of Chrome alloy steel. It also appears as aisi5140, sae5140, 40X, 41Cr4, SCr440.
  • 40Cr steel heat treatment is also widely used to as grade 8.8 steel equivalent. 
  • Steel Material Standard
GB DIN AISI/SAE SCM
40Cr 41Cr4 AISI5140 SAE5140 SCr440
  • 40Cr steel Chemical Composition (%):
C SI MN S P CR
0.38-0.43 0.15-0.35 0.70-1.00 0.035(MAX) 0.035(MAX) 0.80-1.10
  • 40Cr Steel Mechanical Properties after heat treatment, quenched and tempered QT:
Yield Strength(MPa) Tensile Strength(MPa) Elongation(%) Hardness(HRC)
780(min) 980(mIn) 9%(min) 28-32
  • 40Cr steel round bar, square steel bar, flat steel bar, hexagonal steel bar or other special shapes steel bars.

Steel product

Steel dimensions

Steel round bar

10mm - 310mm

Square steel bar

10mm*10mm – 100mm*100mm

Hexagonal steel bar

16mm to 100mm

Flat steel bar

(6-80)mm – (20-100)mm

Special shapes steel bar

According to your drawing

  • To keep precision size and bright surface, we do Cold drawing, Peeling , Rough turning, Polishing, Grinding
  • 40Cr steel bar application: gears, anchor bolts, studs, pins, rolls, spindles, axles, crankshafts & fasteners

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