Detailed Introduction
Model : T4/SKH3/1.3255/S18-1-2-5
Application : high speed steel
Content : Equivalent Steel with exact or nearest equivalents
|
Grade |
C |
Mn |
P |
S |
Si |
Cr |
V |
T |
Mo |
|
T4 |
0.70-0.80 |
0.10-0.40 |
≤0.030 |
≤0.030 |
0.20-0.40 |
3.75-4.50 |
0.80-1.20 |
17.50-19.00 |
0.40-1.00 |
|
Grade |
C |
Mn |
P |
S |
Si |
Cr |
V |
Mo |
W |
|
1.3255 |
0.75-0.83 |
≤0.40 |
≤0.030 |
≤0.030 |
≤0.45 |
3.80-4.50 |
0.80-1.20 |
0.50-0.80 |
17.50-18.50 |
|
Grade |
C |
Mn |
P |
S |
Si |
Cr |
V |
W |
|
|
SKH3 |
0.73-0.83 |
≤0.40 |
≤0.030 |
≤0.030 |
≤0.45 |
3.80-4.50 |
0.80-1.20 |
17.00-19.00 |
|
Description of T4:
T4 steel for tungsten system general cobalt-containing high-speed steel, compared with W18Cr4V red hard and high temperature hardness slightly higher, but low toughness, after quenching, surface hardness can reach 63~66HRC.
ASTM T4 is used as high speed cutting tools, automatic machine tools for cutting higher strength materials.
Hardness: Delivery hardness :(other processing methods)≤285HB;(Annealing)≤269HB.
Heat treatment system and quenching and tempering hardness :≥63HRC
Heat treatment specification: quenching,820~870℃ preheating,
1270~1290℃(salt bath furnace) or 1280~1300℃(box furnace) heating, oil cold,
540-560 ℃ tempering twice, 2h each time.
Hot-rolled, forged and cold-drawn steel bars shall be delivered in annealing condition, hot-rolled and forged steel bars shall be delivered after annealing + other processing methods (peeling, light drawing, polishing or polishing, etc.).
Typical applications are:
· Drills,
· Milling Cutters,
· Thread Cutting Tools,
· Knurling Tools,
· Cold extrusion punches
· Broaches etc.
Solar Special Steel International Limited
Contact Person :Wendy
Telephone:+86 18688633122 whatsapp&wechat
Skype: .cid.8920082fecfa0b5c
Email:ss@solarsteel.cn
