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
EN ISO 4957: 2000 , DIN 17350 (1980)
Round bar / Flat bar / Square bar
Bright - peeled + polishing /centerless grinding / peeled + slidabrading
Forged - ring /tube /pipe casing /discs /shaft
CHEMICAL COMPOSITION (WEIGHT %)
C (％): 0.55 ~ 0.62
Si (％): 0.15 ~ 0.35
Mn (％): 0.80 ~ 1.10
P (％)≤: 0.035
S (％)≤: 0.035
Cr (％): 0.90 ~ 1.20
Mo (％): -
V (％): 0.07 ~ 0.12
MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT AND HARDNESS
Hot working tenperature /℃: 1050～850
Annealing temperature /℃: 710～750
Hardness after annealing ≤HBW: 225
Quenching temperature /℃: 820～850
Cooling medium: oil
Common tempering temperature /℃: 180~300
Hardness after tempering at temperature HRC|100℃: 61
Hardness after tempering at temperature HRC|200℃: 59
Hardness after tempering at temperature HRC|300℃: 56
Hardness after tempering at temperature HRC|400℃: 52
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry, pleased to email or call our resident team of qualified production engineers.
Round bar / Wire rod (Diameter): 5.5mm to 550mm
Square bar / Flat bar: 3mm to 1000mm
Plate / Sheet steel / Steel strip: 0.1mm to 1000mm
Width: 8mm to 1000mm
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.