Product Details
ISO 4957 Grade 40CrMnMoS8-6
TYPICAL APPLICATIONS
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
PRODUCT DESCRIPTION
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
※ MATERIAL SPECIFICATIONS
EN ISO 4957: 2000 , DIN 17350 (1980)
※ AVAILABLE SHAPES
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 |
V | | |
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 PropertiesThermal 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 RegimeAnnealing | Quenching | Tempering | Normalizing | Q & T |
√ | √ | √ | √ | √ |
※ INVENTORY - hot rolled bar
Diameter: 12mm, 30mm, 44mm, 25mm
Quantity: 458kg
PRODUCT PROFILE
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.
Company Profile
We, Shanghai Unite Steel are committed to integrate engineering
steel resources in china and serve the global engineering steel
market. Our company has more than 15 years of experience in steel
researching, production, managing and sales. And our team mostly
are based on and worked in national famous steel enterprise.
In the aspect of resources and information, we have established
cooperative and stronger relationship with nearly hundred
enterprises, either state-owned or private owned in china, such as:
DAYE Special Steel-a famous steel enterprise with the longest
steelmaking history; BAO Steel, and Dongbei Special Steel Group-the
biggest special steel manufacturer; TPCO, VALIN-largest seamless
steel tube production enterprise; What's more, we have built long,
deep and close business relationship with dozens of steel
companies, Sharing and holding equities with several steel
enterprises. Because of the close cooperation with steel companies
and our pioneering spirit, which can ensure us stay at the top
competition, and ensure our customers get what they really want!
