MATERIAL CATEGORY - Cold work alloy tool steel
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.
Air hammer 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
MATERIAL SPECIFICATIONS - EN ISO 4957: 2000 , DIN 17350 (1980)
Round bar / flat bar / hollow bar / forgings / plate
Bright - peeled + polishing /centerless grinding / peeled + slidabrading
Forged - ring /tube /pipe casing /discs /shaft
Round bar / Wire rod (Diameter): 5.5mm to 650mm
Square bar / Flat bar: 3mm to 1000mm
Plate / Sheet steel / Steel strip: 0.1mm to 300mm
Width: 8mm to 1500mm
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.
CHEMICAL COMPOSITION (Mass weight - %)
C (％): 0.28 ~ 0.35
Si (％): 0.25 ~ 0.40
Mn (％): 0.40 ~ 0.60
P (％)≤: 0.030
S (％)≤: 0.030
Cr (％): 0.40 ~ 0.70
Mo (％): -
V (％): 0.07 ~ 0.12
MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT AND HARDNESS
Hot working tenperature /℃: 1050～850
Annealing temperature /℃: 680～720
Hardness after annealing ≤HBW: 220
Quenching temperature /℃: 830～860
Cooling medium: water / water
Common tempering temperature /℃: 180~250
Hardness after tempering at temperature HRC|100℃: 52
Hardness after tempering at temperature HRC|200℃: 50
Hardness after tempering at temperature HRC|300℃: 47
Hardness after tempering at temperature HRC|400℃: 43
INVENTORY - Forged bar
Diameter: 100mm, 80.4mm, 90mm, 125mm
TECHNICAL SALES ASSISTANCE
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