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Mechanical ISO 4957 Grade 40CrMnMoS8-6 Cold Tool Steel Bar

China SHANGHAI UNITE STEEL certification
China SHANGHAI UNITE STEEL certification
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Mechanical ISO 4957 Grade 40CrMnMoS8-6 Cold Tool Steel Bar

Mechanical ISO 4957 Grade 40CrMnMoS8-6 Cold Tool Steel Bar
Mechanical ISO 4957 Grade 40CrMnMoS8-6 Cold Tool Steel Bar

Large Image :  Mechanical ISO 4957 Grade 40CrMnMoS8-6 Cold Tool Steel Bar

Product Details:
Place of Origin: CHINA
Brand Name: UST
Certification: ISO
Model Number: ISO 4957 Grade 40CrMnMoS8-6
Payment & Shipping Terms:
Minimum Order Quantity: MOQ1-2TONS
Packaging Details: Plastic plugs in both ends, Hexagonal bundles of max 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips.
Delivery Time: Within 5-8 weeks
Payment Terms: L/C, T/T
Supply Ability: 1500 ton/month
Detailed Product Description
Products: Cold Work Tool Steel Is Alloy: Yes
Standard: ISO4957 MOQ: 3 Tons
High Light:

ISO 4957 Cold Tool Steel Bar


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Piercing Tool Steel Bar

ISO 4957 Grade 40CrMnMoS8-6



Alloy tool steel is widely used to produce the cutting tool, cold/heat distortion mould and measuring implements,
and further to manufacture the piston, valve, valve seat of fuel pump of diesel engine.
Cutting tools
Mechanical parts  
Air hammer tools
Piercing tools
The alloy is usually produced by EAF /VD /LF followed by electroslag refining (ESR) if necessary for special purpose.
Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different level according to the buyers' requirements.
Bars are usually supplied bright in the softened condition.
Final heat treatment - heat treatment / QT 
   EN ISO 4957: 2000 , DIN 17350 (1980)
Black bar /Flat bar /Square bar 
Bright - peeled + polishing /centerless grinding / peeled + slidabrading
Forged - ring /tube  /pipe casing /discs /shaft

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤)
C 0.35  0.45
Si 0.30  0.50
Mn 1.40  1.60
P   0.030
S 0.05  0.10
Cr 1.80  2.00
Mo 0.15  0.25

Mechanical Properties

Tensile strength 206~844 σb/MPa
Yield Strength 398 σ 0.2 ≥/MPa
Elongation 94 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 558~382 -
HRC 30 -
Physical Properties
Thermal expansion 86-93 e-6/K
Thermal conductivity 28-75 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 6414-0429 째C
Density 9843-3299 kg/m3
Resistivity 0.50-0.60 Ohm.mm2/m
Heat Treatment Regime





Q & T

※ INVENTORY - hot rolled bar
Diameter:   12mm, 30
mm, 44mm, 25mm
Quantity:    458kg
Round bar / Wire rod (Diameter):  0.50mm to 3000mm
Square bar / Flat bar: 3mm to 2000mm
Plate / Sheet steel / Steel strip: 0.1mm to 2500mm
Width: 8mm to 2500mm
Length: random length or based on the customer's special requirement.
Forged steel shape: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.
Pipes / Tubings: OD 3-219 mm, with wall thickness ranging from 0.50 to 35 mm. 









Contact Details

Contact Person: Anndy

Tel: +8615502127172

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