High Speed Steel bar M7/1.3348/HS2-9-2/T11307 – GMTC

M7

SpecificationASTM A600

M7 is one of the molybdenum alloy high speed tool steels and contains tungsten, chromium and vanadium for better strength. It has good hardenability and superior wear resistance. M7 is widely used in the cutting tools, cutting drills, and cold forming tools for machining operations.

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Introduction

Product properties

˙ High hardness after quenching and tempering

˙ High wear resistance and cutting ability

˙ Good grindability

˙ High impact resistance

Industrial Applications

˙ Machining tools (milling cutter, drill)

˙ Cold forming mold (screw mold, header punch, die)

Specifications

Chemical composition (wt. %)

Element
C
Si
Mn
P
S
Cr
Mo
V
W
Ni+Cu
Min.
0.97
0.20
0.15
-
-
3.50
8.20
1.75
1.40
-
Max.
1.05
0.55
0.40
0.030
0.030
4.00
9.20
2.25
2.10
0.75

Physical Property

Density (g/cm^3)
8.3

Modulus of elasticity

Temperature (℃)
Gpa
20
217

Thermal Expansion Coefficient

Temperature (℃)
10^-6/℃
20~100
11.7
20~500
13.4

Thermal Conductivity

Temperature (℃)
W/m·K
20
19

Mechanical Property

Property
Specification Values
Quenching & Tempering Hardness
65 HRC min.
Annealing Hardness
255 HBW max.

Size Ranges

Products
Diameter (mm)
Length (mm)
Rolled bar
10~95
3,000~5,700
Forged bar
95.2~158
3,000~5,700
Billet
105x105, 125x125, 133x133
7,000 max

Heat Treatment Conditions

Heat Treatment Conditions
1204℃ Oil Quenching +552℃ Air Cooling

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