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AISI A7 / UNS T30107 Superhigh Carbon Cr-W Based Tool Steel
AISI A7 / UNS T30107 Superhigh Carbon Cr-W Based Tool Steel

AISI A7 / UNS T30107 Superhigh Carbon Cr-W Based Tool Steel

Product parameters
Material Technical Standards:: ASTM A681 - 2004
Place of Origin: P. R. China
Terms of Price:: Ex works, CIF, and CFR
Mode of transportation:: Air Cargo, Sea shipment or International Express
Surface Condition:: Peeled - Rough turned - Bright surface.
Production Lead Time:: Within 75 days after 30% downpayment.
Company ISO Register No:: UQ211218R0
INQUIRY
Description
 
Tool steel is to fabricate the cutting tool, measuring implement, mould, and wear-resisting tool, it possesses higher hardness and keeps maintaining the high hardness and redhardness under high temperature, and more abrasive resistance, proper toughness. Tool steel is commontly divided into carbon tool steel, alloy tool steel, high speed steel.  
Alloy tool steel is one type of steel adds the alloying elements in the carbon tool steel, such as Si, Mn, Ni, Cr, W, Mo, V. Adding the elements (Cr, Mn) can improve the hardenability of tool steel. Or adding other alloying elements meanwhile (the gross is not more than 5%).
Alloy tool steel is widely used to produce the cutting tool, cold/heat distortion mould and measuring implement. and further to manufacture the piston, valve, valve seat of fuel pump of engine.

The alloy is usually produced by BEF & AOD followed by electroslag remelting (ESR) / VAR if necessary for special purpose.
Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different levels according to the buyers' requirements.

Chemical Composition (Weight %)
C (％) 2.00 ～ 2.85
Si(％) ≤ 0.50
Mn(％) ≤ 0.80
P(％) ≤ 0.030
S (％) ≤ 0.030
Cr (％) 5.00～ 5.75
Ni (％) -
Mo(％) 0.90 ~ 1.40
Other (％) W 0.50 ~ 1.50
V 3.90 ~ 5.15
Mechanical Properties
Condition of heat treatment annealing
Tensile Rm (MPa) -
Yield Rp0.2 (MPa) -
Elongation A (%) -
Reduction in cross section on fracture Z (%) -
Impact AKV/AKU (J) -
Brinell Hardness (HBW) 235 ～ 262
Products Shapes and Dimensions:
Round bar (Diameter): 5.00 ~ 600mm
Square bar / Flat bar: 10 ~ 610mm
Steel strip via cold rolled: T0.1 - 3mm X W5 - 650mm X L (or in coil form)
Forging piece: Different shapes based on OEM

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