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T1 1.3355 HS18-0-1 High Speed Tool Steel

T1 1.3355 HS18-0-1 High Speed Tool Steel

T1 1.3355 HS18-0-1 High Speed Tool Steel

T1 1.3355 HS18-0-1 High Speed Tool Steel

AISI/ASTM T1 tool steel is one of the original tungsten high speed steels, although all tungsten steel grades are used to a limited extent because of the cost and questionable availability of tungsten. Of the T group steels, the general purpose T1 tool steels and the high-vanadium-cobalt T15 are most commonly used.

 

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. 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.

 

Applications of ASTM/AISI T1 Tool Steel

  • Broaches
  • Drills
  • Hobs
  • Knurling Tools
  • Lathe Tools
  • Milling Cutters
  • Nut Piercers
  • Planer Tools
  • Reamers
  • Shaving Tools
  • Taps
  • Thread Cutting Tools

 

 

Equivalent grades of   steel   HS18-0-1 (1.3355)

EU
EN
USA
Germany
DIN,WNr
Japan
JIS
France
AFNOR
England
BS
China
GB
Sweden
SS
Poland
PN
Austria
ONORM
Russia
GOST
HS18-0-1 T1 HS18-0-1 SKH2 Z80WCV18-04-01 BT1 W18Cr4V 2750 SW18 S200 R18

 

Chemical composition %   of   steel   HS18-0-1 (1.3355):   EN 4957-2000

C Si Mn P S Cr W V
0.73 – 0.83 max   0.45 max   0.4 max   0.03 max   0.03 3.8 – 4.5 17.2 – 18.7 1 – 1.2

 

AISI/ASTM T1 Tool Steel Heat Treatment and Properties

Treatment Temperature Range Cooling/Quenching Notes
Forging 1700-2100° F Slow. Cool slowly in dry sand or in other insulating media.
Annealing 1600-1650° F Cool slowly at a rate of 35° F per hour to 1000° F. For best results, insulating media is desirable. Hold at temperature for 2 hours.
Stress Relieving 1100-1300° F Cool slowly Stress relieve after rough machining
Preheating 1500-1550° F Preheat time in furnace is ¾ Hr. per inch of thickness. Heating up to temperature as slow as possible.
Hardening 2325-2375° F (furnace) Quench in air or warm oil. To minimize quenching strains, quench in salt at 1000° F For maximum wear resistance, harden at 2375° F. For maximum toughness and high hardness, harden at 2275° F.
2275-2350° F (salt bath)
Tempering 1022 ° F-1058 ° F Temper T1 high-speed steel immediately after quenching. Hold for at least two hours Double tempering is recommended. The usual tempering time is 2+2 hours. Recommended temperature is 1000-1075° F for cutting tools. 1100-1200° F for shock tools

 

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