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ASTM T2/UNS T12002 High Speed Steel

ASTM T2 is the most widely used tungsten based universal high-speed steel, with high hardness, red hardness and high temperature hardness, which is easy to grind. ASTM T2 is suitable for machining soft or medium hardness (below 300~320HB) materials and making high-temperature wear-resistant mechanical parts.
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  • ASTM T2/UNS T12002

Standard of AISI T2 High Speed Steel

CountryUSA
StandardASTM A600
GradesT2/T12002


AISI T2 High Speed Steel Chemical Composition Properties

ASTM A600CMnPSSiCrVMoWCo
T20.800.900.200.400.030.030.200.403.754.501.802.401.0017.5019.00


AISI T2 High Speed Steel Mechanical Properties

T2 Tool Steel Physical Properties


PropertiesMetricImperial
Density7.86 g/cm30.284 lb/in3


Mechanical Properties of T2 HSS Tool Steel


Yield
Rp0.2
(MPa)
Tensile
Rm
(MPa)
Impact
KV
(J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated ConditionHBW
339 (≥)619 (≥)111343Solution and Aging, Annealing, Ausaging, Q+T,etc234


Thermal Properties of T2 Tool Steel


PropertiesMetricImperial
Thermal expansion co-efficient (@20-260°C/68-500°F)10.6 µm/m°C5.89 µin/in°F Forging of ASTM T2 High Speed Steel

Soak AISI T2 tool steel for 1 hour at 2150 F (1177℃) prior to forging.

Do not work below 1850 F (1010℃). Post-work solution treatment is required prior to final hardening.



ASTM T2 High Speed Steel Heat Treatment

Annealing hardness
HBS
Cold pull hardness
HBS
Preheating temperature
Quenching temperature
Holding time
min
Hardening mediumTemper temperature
After tempering hardness
≥HRC
salt-bath furnacecontrolled atmosphere furnace
235262788119112045~15air cooling52260


Applications of ASTM/AISI T2 High Speed Steel

AISI T2 high speed steel are mainly used in high speed tool and cutting applications, such as drills, milling processes, reamers, etc. Some typical applications of T2 tool steel are as below:

  • Turning and slotting tools

  • Broaching tools

  • Reamers

  • Threading dies

  • Twist drills

  • Tapes


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