Alloy tool steel: 4CrW2Si

Standard: GB/T 1299- 1985

● Features and scope of application:

Impact-resistant tool steel is added with W on the basis of chromium silicon steel, which has certain hardenability and high-temperature strength, and may obtain higher toughness in tempered state. It is mainly used to make tools working under high impact load, such as pneumatic tools, chisels, punching and trimming compound dies, punching dies, scissors for cold cutting and some small hot working dies.

● Chemical composition:

C: 0.35 ~ 0.45

Silicon Si: 0.80 ~ 1. 10

Manganese Mn: ≤ 0.40

Sulfur content: ≤ 0.030

Phosphorus P: ≤ 0.030

Chromium Cr: 1.00 ~ 1.30

Nickel Ni: allowable residual content ≤0.25.

Copper and copper: allowable residue ≤0.30.

Female: 2.00-2.50

● Mechanical properties:

Hardness: annealing, 2 17 ~ 179 HB, indentation diameter 4.1~ 4.5 mm; Quenching, ≥53HRC

● Heat treatment specification and metallographic structure:

Heat treatment specification: the sample is quenched at 860 ~ 900℃ and oil cooled.

● Delivery status: the steel is delivered in the annealed state.