AISI 4118 Scm420 18crmo4 DIN 1.7243 18CD4 708m20 Tool Steel Bar

Model NO.
KM-801
Special Use
Mold Steel, Cold Heading Steel
Packaging Detail
Standard Sea-Worthy Package
Certificate
ISO, BV, SGS, Mill Test Certificate
Price Term
Ex-Work, Fob, CFR, CIF, etc.
Specifications
Flat Bar, Round Bar, Angle Bar, Square Bar
Surface
Bright, Black
Delivery Time
7-30 Days
MOQ
3 Tons
Loading Port
Shanghai
Length
2m,3m,5.8m, 6m, 8m or as Required.
Size
130mm-1000mm (Optional)
Transport Package
Standard Sea-Worthy Package
Specification
130mm-1000mm (optional)
Trademark
Kingmetal
Origin
China (Mainland)
Production Capacity
800tons/Month
Reference Price
$ 2,880.00 - 2,970.00
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Product Description

AISI 4118 Scm420 18crmo4  DIN 1.7243 18CD4 708M20 tool steel bar

1.Supply Form & Size & Tolerance

Hot rolled bar:Φ6-Φ130mm,Length:3000-10000mm

Hot Forged round bar:Φ130-Φ1000mm,Length:3000-10000mm

Flat bar/Blcoks:Thickness :120-800mm xWidth:120-1500mm,Length:2000-6000mm

Surface Finish Black-Forged Black-Rolled Turned    Grinding Polished Peeled Cold Drawn
Tolerance (0,+5mm) (0,+1mm) (0,+3mm) Best h9 Best h11 Best H11 Best H11

2.Chemical Composition

Grade C Si Mn Cr Mo P S
18CrMo4/1.7243 0.15-0.21 ≤ 0.4 0.6-0.9 0.9-1.2 0.15-0.25 ≤ 0.025 ≤ 0.035
18CrMoS4/1.7244 0.15-0.21 ≤ 0.4 0.6-0.9 0.9-1.2 0.15-0.25 ≤ 0.025 0.02-0.04

3.Relevant Standards

USA UK Japan France
4118 708M20 SCM420 18CD4

4. Mechanical Property

Diameter d mm ≤ 16 16-40 40-100
Yield Strength Mpa ≥835 ≥685 ≥590
Tensile Strength Mpa 1080-1370 930-1300 800-1150
Elongation, % ≥9 ≥9 ≥10
Reduction of area ,% ≥35 ≥35 ≥40
impact,J ≥25 ≥31 ≥31

5.Forging

18CrMo4 forging temperature:950 - 1100°C,cooled as slowly as possible in the air or in sand after forged.

6.Heat Treatment

  • Normalizing:  870 - 900°C,Cooling in air
  • Soft Annealing:680 - 700°C,Cooling in furnace
  • Carburizing:880-980°C
  • Core-hardening:860-900°C,oil-polymer salt bath
  • Case-hardening:780-820°C,oil-polymer salt bath
  • Carbonitriding:860-950°C
  • Tempering:150-200°C

7.Surface Hardness

  • Soft annealed(+A):Max 207HB
  • Treated to hardness range(+TH):156-207HB
  • Treated to ferrite-pearlite structure and hardness range(+FP):140-187HB
Type Distance mm 1.5 3 5 7 9 11 13 15 20 25 30 35 40

+H 		HRC Min 39 37 34 30 27 24 22 21 - - - - -
HRC Max 47 46 45 42 39 37 35 34 31 29 28 27 26

+HH 		HRC Min 42 40 38 34 31 28 26 25 22 20 - - -
HRC Max 47 46 45 42 39 37 35 34 31 29 28 27 26

+HL 		HRC Min 39 37 34 30 27 24 22 21 - - - - -
HRC Max 44 43 41 38 35 33 31 30 27 25 24 23 22

8.Application

18CrMo4 case hardening steel is widely in gear components of all kind and cog wheels. Open die steel forgings for general engineering purposes.High and medium pressure steam pipes, headers and superheaters.

AISI 4118 Scm420 18crmo4 DIN 1.7243 18CD4 708m20 Tool Steel Bar
AISI 4118 Scm420 18crmo4 DIN 1.7243 18CD4 708m20 Tool Steel Bar




 

 

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