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T30407 - D7 High Carbon & Chromium Cold Work Steel
T30407 - D7 High Carbon & Chromium Cold Work Steel

T30407 - D7 High Carbon & Chromium Cold Work Steel

Product parameters
Material Category:: High Carbon & Chromium Cold Work Tool Steel
Material Technical Standards:: ASTM A681 - 2004
Min. order quantity Per Batch:: 3300 KG
Product Shapes:: Round bar, Flat bar, Plate
Ultrasonic Test Standard:: / GB/T 4162 / EN 10228-3 / EN 10308.
Production Lead Time:: Within 75 days after 30% downpayment.
Unified Social Credit Code:: 91510871777942750J
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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%).

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.

Main Chemical Composition (mass weight %)
C (％) 2.15 ～ 2.50
Si(％) 0.30 ～ 0.50
Mn(％) 0.30 ～ 0.50
P(％) ≤ 0.030
S (％) ≤ 0.030
Cr (％) 11.5 ～ 13.5
Ni (％) -
Mo(％) 0.70 ～ 1.20
Other (％) V 3.80 ～ 4.40
Mechanical Properties At Room Temperature.
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
Forms and Dimensions:
Round bar (Diameter): 5.50 ~ 650mm
Square bar / Flat bar: 3 ~ 650mm
Wire rod (Diameter): 0.10 ~ 16mm
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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