1.2743
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Material specifications 1.2743 round bar, flat bar, plate and forgings, 1.2743 Material properties from steelmaking, hot forging, hot rolling, heat treatment, cold worked.
MATERIAL DATA SHEET - W-Nr 1.2743
MATERIAL CATEGORY - Cold work alloy tool steel
Cold work die includes cold punching mould, wire-drawing die, drawing die, coining die, thread rolling die, cold heading die, cold extrusion die, Based on the working condition, cold work die should have the high hardness, strength, abrasion resistance, toughness, hardenability, quenching degree, and other processing property. This kind of alloy tool steel belongs to high carbon alloy steel (carbon mass fraction is over 0.80%), Chromium is key element of alloy with mass fraction below 5% generally.
MATERIAL SPECIFICATIONS - EN ISO 4957: 2000 , DIN 17350 (1980)
PRODUCT DESCRIPTION
The alloy is usually produced by EAF /VD /LF /IFF 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 (peeling or centreless grinding) in the softened = SA condition.
Final heat treatment - heat treatment / spheroidizing annealing
PROFILE AND SIZES
Round bar / Wire rod (Diameter): 5.5mm to 500mm
Square bar / Flat bar: 3mm to 1200mm
Plate / Sheet steel / Steel strip: 0.5mm to 1200mm
Width: 8mm to 1200mm
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 (％): 0.55 ~ 0.60
Si (％): 0.30 ~ 0.50
Mn (％): 0.50 ~ 0.80
P (％)≤: 0.035
S (％)≤: 0.035
Cr (％): 1.00 ~ 1.30
Mo (％): 0.30 ~ 0.40
V (％): 0.07 ~ 0.12
Ni (％): 2.70 ~ 3.00
Si (％): 0.30 ~ 0.50
Mn (％): 0.50 ~ 0.80
P (％)≤: 0.035
S (％)≤: 0.035
Cr (％): 1.00 ~ 1.30
Mo (％): 0.30 ~ 0.40
V (％): 0.07 ~ 0.12
Ni (％): 2.70 ~ 3.00
MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT AND HARDNESS
Hot working tenperature /℃: 1050～850
Annealing temperature /℃: 690～700
Hardness after annealing ≤HBW: 235
Annealing temperature /℃: 690～700
Hardness after annealing ≤HBW: 235
Quenching temperature /℃: 840 ~ 870
Cooling medium: oil
Common tempering temperature /℃: 180~220
Hardness after tempering at temperature HRC|100℃: 61
Cooling medium: oil
Common tempering temperature /℃: 180~220
Hardness after tempering at temperature HRC|100℃: 61
Hardness after tempering at temperature HRC|200℃: 59
Hardness after tempering at temperature HRC|300℃: 54
Hardness after tempering at temperature HRC|400℃: 50
Hardness after tempering at temperature HRC|400℃: 50
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.
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry. pleased to EMAIL our resident team of qualified production engineers, Email: sales@ccsteels.com
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