Alloy tool steel: 4CrW2Si
Standard: GB / T 1299-1985
● Features and application:
Impact-resistant tool steel, the steel in chrome silicon steel on the basis of adding the W, which in a certain hardenability and high temperature strength, while the state may be given in the tempered high toughness. Mainly for the production of high-impact loading operation tools such as pneumatic tools, chisel, cutting-edge composite blanking die, die, cold punching cut with scissors and other tools, as well as some small hot die.
● Chemical Composition:
Carbon C: 0.35 ~ 0.45
Si Si: 0.80 ~ 1.10
Manganese Mn: ≤ 0.40
Sulfur S: ≤ 0.030
Phosphorus P: ≤ 0.030
Chromium Cr: 1.00 ~ 1.30
Ni: to allow the residual content of ≤ 0.25
Copper Cu: to allow the residual content of ≤ 0.30
Tungsten W: 2.00 ~ 2.50
● Mechanical Properties:
Hardness: Annealed, 217 ~ 179HB, indentation diameter of 4.1 ~ 4.5mm; quenching, ≥ 53HRC
● Heat treatment and microstructure specifications:
Standard heat treatment: quenching the sample 860 ~ 900 ℃, oil cooling.
● Delivery status: the status of delivery of steel to annealing.