What Is the Feature of 6CrW2Si Cutting Blade

6CrW2Si cutting blade is an impact-resistant tool steel, with a composition and performance similar to 5CrW2Si, but with higher quenching hardness and high temperature strength. 6CrW2Si alloy tool steel is usually used as tools that bear impact loads and require high wear resistance, such as pneumatic tools, chisels, and grades working under heavy loads, cold sheet metal shearing machine shear blades, air hammer tools, etc.

1. Chemical Composition

Carbon C: 0.55~0.65 Silicon Si: 0.50~0.80 Manganese Mn: ≤0.40 Sulfur S: ≤0.030 Phosphorus P: ≤0.030 Chromium Cr: 1.00~1.30 Nickel Ni: allowable residual content ≤0.25 Copper Cu: allowable residual content ≤0.30 Tungsten W: 2.00~2.70.

2. Physical Properties

The critical temperature of 6CrW2Si steel is shown in the table.

6CrW2Si steel critical temperature.

Critical point Ac1 Ac3 Ms

Temperature (approximate value)/℃ 775 810 280

3. Heat Treatment of 6CrW2Si Cutting Blade

The heat treatment process of 6CrW2Si steel is shown in the table.

6CrW2Si heat treatment process

Item Heating temperature/℃ Initial forging temperature/℃ Final forging temperature/℃ Cooling method

Steel ingot

Steel billet 1170~1200

1150~1170 1150~1180

1100~140 ≥850

≥850 Slow cooling

Slow cooling

4. Mechanical Properties

Hardness: Annealing, 285~229HB, indentation diameter 3.6~4.0mm; quenching, ≥57HRC

6CrW2Si alloy tool steel heat treatment specifications and metallographic structure:

Heat treatment specifications: Sample quenching 860~900℃, oil cooling.

5. Reference to Corresponding Grades

China GB standard grade 6CrW2Si, Russia r0cT standard grade 6xB2C, France NF standard grade 55wc20, Germany DlN standard grade 60WCrv7, Germany DIN standard material number 1 2550, Sweden SIS standard grade 2550, International Organization for Standardization (ISO) standard grade 60WCrV2.