COLD WORK TOOL STEEL S-1

S1 is an alloy shock-resisting tool steel for both hot and cold work applications. The tungsten substance of this tool steel grade gives weariness resistance, the chromium content gives profundity of hardness and resistance to abrasion.

S1 tool steel is reasonable for cool work devices subject heavy shock and uneven loading; for instance, press devices utilized for punching heavy gauge material, shear blades, nut blanking tools, perforating and piercing punches.Shock-resisting tool steels are assigned as gathering S steels as indicated by the AISI classification system.


S1, S2, S5, S6, and S7 are the types of shock-resisting steels. The hardenability of gathering S steels can be controlled by changing their creation instead of adjusting the melting procedures and grain size. These steels can get ideal hardness at higher austenitizing temperatures. The treating resistance of gathering S steels can be improved by the expansion of silicon, which also forms a microstructure to resist distortion in tempered conditions.



Chemical Composition


Element
%
Carbon,C0.60
Tungsten 2.00
Chromium,Cr1.00
Vanadium
0.15

Physical Properties


Properties
Metric
Imperial
Density (@20°C/68°F)7.89 g/cc0.285 lb/in 3

Mechanical Properties


Properties
Metric
Imperial
Hardness, Rockwell C (air cooled from 899°C, 30 mins)54.554.5
Hardness, Rockwell C (air cooled from 927°C, 30 mins)5656
Hardness, Rockwell C (air cooled from 982°C, 30 mins)56.556.5
Modulus of elasticity207 GPa30000 ksi
Charpy impact (V-notch; oil quenched from 954°C; 149°C temper temperature)10.8 J8.00 ft-lb
Charpy impact (V-notch; oil quenched from 954°C; 625°C temper temperature)29.8 J22.0 ft-lb
Machinability (1% carbon steel)70.0 - 75.0%70.0 - 75.0%
Poisson's ratio0.27-0.300.27-0.30

Thermal Properties


Properties
 
Conditions
 
T (°C)Treatment
Thermal expansion12.4 x 10 -6 /ºC20-100-


Features


   Forging

   Martempering

   Hardening

   Stress Relieving

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