High Speed Steel bar M2/1.3343/SKH51 – GMTC

M2

  • 1.3343, HS6-5-2C, T11302, SKH51

SpecificationASTM A600, JIS G4403, EN ISO 4957

It is medium alloy high speed steel with good machinability. In addition, it achieves a balance between toughness, wear resistance, and thermal hardness because of its alloy composition.

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Introduction

Product properties

˙Outstanding cutting hardness, wear resistance, and toughness at high temperatures

˙Special carbide precipitated during tempering at high temperatures and secondary hardening

˙Fine grain size

˙Uniform carbide

˙High toughness

Industrial Applications

˙Machining tools (milling cutter, drill)

˙Mold applicaitons (screw mold, header punch, die)

Specifications

Chemical composition (wt. %)

Element
C
Si
Mn
P
S
Cr
Mo
V
W
Ni+Cu
Min.
0.78
0.20
0.15
-
-
3.75
4.50
1.75
5.50
-
Max.
0.88
0.45
0.40
0.030
0.030
4.50
5.50
2.20
6.75
0.75

Physical Property

Density (g/cm^3)
8.1

Thermal Expansion Coefficient

Temperature (℃)
10^-6/℃
500
12.7
600
13

Thermal Conductivity

Temperature (℃)
W/m·K
20
19

Mechanical Property

Property
Specification Values
Annealing Hardness
248 HBW max.
Quenching & Tempering Hardness
64 HRC min.

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
1216℃Salt Bath +552℃ Air Cooling

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