High Speed Steel bar M42/1.3247/SKH59 – GMTC

M42

  • 1.3247, HS2-9-1-8, T11342, SKH59

SpecificationASTM A600, JIS G4403, EN ISO 4957

It is high speed cobalt alloy steel that is regularly manufactured. When compared to traditional high speed steel, it has outstanding thermal hardness so that it is suitable for higher cutting speeds or extends the time before the cutting tool needs replacement.

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Introduction

Product properties

˙Good high temperature hardness

˙High wear resistance

˙High cutting ability

˙High impact resistance

˙Fine and uniform grain size

Industrial Applications

˙Cutting tool (gear hob, drill, milling cutter, broach)

˙Trimming dies

˙Tap

˙Punch

˙Header punch

Specifications

Chemical composition (wt. %)

Element
C
Si
Mn
P
S
Cr
Mo
V
W
Ni+Cu
Co
Min.
1.05
0.15
0.15
-
-
3.50
9.00
0.95
1.15
-
7.75
Max.
1.15
0.65
0.40
0.030
0.030
4.25
10.00
1.35
1.85
0.75
8.75

Physical Property

Density (g/cm^3)
8.3

Thermal Expansion Coefficient

Temperature (℃)
10^-6/℃
500
12.4
600
12.5

Thermal Conductivity

Temperature (℃)
W/m·K
20
19

Mechanical Property

Property
Specification Values
Hardness (HBW)
269 max.
Hardness After Quenching (hardenability) (HRC)
66 min.

Size Ranges

Products
Diameter (mm)
Length (mm)
Rolled bar
10~95
3,000~5,700
Forged bar
95.2~112
3,000~5,700
Billet
105x105, 125x125
7,000 max

Heat Treatment Conditions

Heat Treatment Conditions
1188℃Oil Quenching+538℃ Tempering

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