What is T4 high speed steel? It is a tungsten-based high-speed cutting tool steel with high red hardness and high temperature hardness. The heat treatment of T4 high speed steel generally adopts the quenching + tempering process, which is often used in the field of tool and mold manufacturing and is suitable for processing metal materials with higher hardness.
This article will give you a detailed understanding of the equivalent specification, chemical composition, properties, application, heat treatment and supply scope of T4 high speed steel supplied by Songshun Steel.
T4 High Speed Steel Equivalent Specification
China GB /T 9943 standard: GB W18Cr4VCo5
American ASTM A600 standard: AISI/SAE/ASTM T4
German DIN EN ISO 4957 standard: DIN EN/DIN S18-1-2-5
British BS 4659 standard: BS T4
Japanese JIS G 4403 standard: JIS SKH3
Korean standard: KS SKH3
International standard: ISO HS18-1-1-5
T4 Steel Chemical Composition
T4 high speed steel contains a large amount of W element, which promotes the formation of carbides, gives it excellent red hardness and wear resistance, strongly reduces the thermal conductivity of the steel, and can also stabilize the grain structure, improve the toughness and strength of the material. It also contains a large amount of Co element, and the addition of cobalt can improve the cutting performance, hardness, toughness, etc. of T4 high speed steel, thereby improving the accuracy and efficiency of machining.
ASTM T4 High Speed Steel Properties
Higher wear resistance, red hardness and high temperature hardness.
Excellent cutting performance, able to maintain stable cutting results under high-speed processing conditions.
Good fatigue strength, thermal stability and toughness.
Good impact resistance and heat resistance.
Good corrosion resistance.
AISI T4 High Speed Steel Application
T4 high-speed steel is widely used in automobiles, machining, tool manufacturing, molds, aerospace, metal processing, electronics and other fields. It is often used to manufacture various blades, die-casting molds, milling cutters, cold extrusion punches, die inserts, drill bits, auto parts, stamping dies, gear cutters, bearings, shearing dies, planers, turning tools, etc.
T4 High Speed Steel Heat Treatment
1.Quenching
First, T4 high speed steel is preheated, usually at a temperature of 800-870°C, and then heated to the critical quenching temperature, at a temperature of 1220-1250°C (quenching furnace), 1270-1290°C (salt bath furnace) or 1280-1300°C (box furnace), and finally oil cooling.
2.Tempering
Tempering is performed immediately after quenching. Usually T4 steel is heated slowly and evenly to the tempering temperature of 540-580°C. It is recommended to perform secondary tempering, holding the temperature for not less than 2 hours each time, and finally air cooling.
T4 High Speed Steel Supply
Shape types: round bar, steel plate, tube, steel strip, forging, forged pipe, forged plate, square steel, plate, thin plate, seamless pipe, welded pipe, round steel, flat steel, thick plate, bar, etc.
Specifications: Various specifications are available and can be produced according to the specific needs of customers.
Common specifications include: round steel: diameter 2mm-300mm;
Plate: thickness 2mm-200mm, width 200mm-900mm.
Surface treatment: black, rough machined, precision ground, peeled and turned or as per given requirement.
Delivery status: usually hot rolled or heat treated, usually delivery hardness (other processing methods) ≤ 285HB, (annealing) ≤ 269HB, sample heat treatment system and quenching and tempering hardness: ≥ 63HRC.
To sum up, the T4 high speed steel provided by Songshun not only has rich specifications and types, but also has high performance, high quality and wide application. We provide a variety of high speed steel and are committed to providing the best high speed steel to customers around the world. We welcome your inquiries.