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T4
Qilu
Product Description
ASTM A600 AISI T4 Tool Steel - High Speed Steel
1: AISI T4 Steel Introduction
T4 is a copper-based alloy classified as a precipitation-hardening material. It's America steel grade from ASTM A29. It exhibits excellent electrical conductivity, thermal conductivity, and corrosion resistance. Through solution treatment and artificial aging, T4 achieves high strength and favorable comprehensive mechanical properties. This material is widely used in electronic components, electrical connectors, heat exchangers, and precision mechanical parts. T4 is commonly supplied in the solution-treated condition, offering good cold-working formability.
T4 Steel Stock in Warehouse
2: AISI T4 Quality Standard
AISI T4 steel according to ASTM A600.
3: AISI T4 Steel Chemical Composition
| Grade | C | Si | Mn | P | S | Cr | Mo | V | W | Co |
| T4 | 0.70-0.80 | 0.20-0.40 | 0.10-0.40 | 0.030 Max | 0.030 Max | 3.75-4.50 | 0.40-1.00 | 0.80-1.20 | 17.50-19.00 | 4.25-5.75 |
| 1.3255 | 0.75-0.83 | 0.45 Max | 0.40 Max | 0.030 Max | 0.030 Max | 3.80-4.50 | 0.50-0.80 | 0.80-1.20 | 17.50-18.50 | 4.50-5.50 |
| SKH3 | 0.73-0.83 | 0.45 Max | 0.40 Max | 0.030 Max | 0.030 Max | 3.80-4.50 | / | 0.80-1.20 | 17.00-19.00 | 4.50-5.50 |
4: Mechanical Properties
Grade | H+T | Tensile strength | Yield strength | Elongation | Reduction | Impact Value | Hardness/HB |
| T4 | +A | / | / | / | / | / | 170 |
T4 | +QT | 720 | 560 | 15 | 56 | 79/73/85 | 260/262/287 |
5: AISI T4 Steel Equivalent
| Country | USA | German | Japan |
| Standard | AISI/ASTM ASTM A600 | DIN EN ISO 4957 | JIS G4403 |
| Grade | T4/T12004 | 1.3255/HS18-1-2-5 | SKH3 |
6: Goods available in China
The market for T4 high-speed steel in China is specialized and relatively niche. While you can source T4 from the market, it is not a mainstream high-speed steel grade compared to more common types like M2 (W6Mo5Cr4V2). Consequently, readily available stock in distributors' warehouses is often limited, and lead times for specific sizes or forms might be longer.
