The AISI T5 steel contains 8% Co, which makes the high temperature performance and toughness better than AISI T4 high speed steel.T5 high speed steel can work in Max 630 °C, Advice work below 600 °C.As T5 tungsten-cobalt high speed steel, it is used in a variety of applications and worldwide it is the most popular high speed steel because of its superior qualities. As a result of its low carbon and high alloy content, the AISI T5 steel contains 8% Co,which makes the high temperature T5 has an outstanding combination of toughness properties and abrasion resistance when correctly hardened and tempered. performance and toughness better than AISI T4 High speed steel. T5 high speed steel is the most widely used tungsten is a general type of high speed steel, high temperature hardness and red hardness and hardness is high, easy to grinding. Apply for working temperature below 630℃ can still keep the cutting performance of cutting tools, such as vehicles, shaver, milling, reaming, broach, drilling, gear cutting tools and tap, die, etc., suitable for processing soft or medium hardness material below (300 ~ 320 HB). And make high temperature abrasion machine parts.