T1 (1.3355) HIGH SPEED STEEL

Specification

Tungsten based high speed steel, good combination of toughness and red hardness. high resistance to wear and softening. relatively easy to harden. T1 high speed steel is an air or oil hardening tool steel which has good comprehensive performance. HSS T1 tool steel has a high hardness (HRC62~66), strength, toughness and heat resistance, which is an excellent cutting tool material.

Application

T-1 tool steel grade is on the whole used for turning, planning & slotting instruments, tapes, twist drill, threading dies, profile slicing instruments, broaching instruments & reamers, shaving tools, planer tools, lathe tools, file cutter’s chisels, screw cutting tools.

Chemical Analysis %

C	Mn	Cr	Si	V	W	P	S
0.65-0.75	0.20-0.45	3.75-4.50	0.20-0.45	0.90-1.30	17.25-18.75	0.030 Max	0.030 Max

Delivery condition
Annealed 269 HB MAX
Heat Treatment

Soft Annealing	Stress-relief annealing	1st preheating	2nd and 3rd preheating	Cooling	Hardness	Hardening	Quenching	tempering	Hardness after quenching HRC
810-840°C	600-650°C	850°approx in an air-circulating furnace	850°C 850-1050°C	Furnace	269HB	1270-1290°C	Air, Oil , thermal bath,550°C	At least three times 540-570°C	62-66

Tempering °C

Tempering°C	300	400	500	600	650
HRC	63	62	65	63	58