R9M4K8 - 1.3207 round, rod, forging
|Mark||Analogue||W. Nr.||Aisi Uns||En||Order|
|Р9М4К8||EP688||~1.3207||Delivery from the stock, in stock|
Percentage composition, GOST 19265−73
|basis||1 — 1.1||0.2 — 0.5||0.2 — 0.5||≤0.6||≤0.03||≤0.03||3 — 3.6||3.8 — 4.3||8.5 — 9.5||2.3 — 2.7||7.5 — 8.5||≤0.25|
High speed tool steel. Hardness after annealing HB 10 -1 = 285 MPa. Steel has a high tendency to decarburization, high viscosity, good wear resistance, good sanding behaviour.
Temperature of critical points
Ac1 = 800, Ac3(Acm) = 840, Ar3(Arcm) = 790, Ar1 = 750
Mechanical properties (20°C)
|-||MPa||MPa||%||%||kJ / m2||-|
The physical properties of the material
|T||E 10— 5||l||r|
sin the Limit of short-term strength
sT — the Limit of proportionality (yield strength for permanent deformation)
d5 — elongation at break.
y — the Relative narrowing
E — the Modulus of elasticity of the first kind [MPa]
l — Coefficient of thermal conductivity (the heat capacity of the material)
KCU — Impact strength
r — share
ApplicationThe manufacturing tool for processing high-strength stainless and heat resisting alloy steels in terms of heating of the cutting edge (cutting tool, milling cutters, shaped cutters, core drills, taps).
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