5CrW2Si Mold steel belongs to steel impact-resistant tool steel. The composition and properties are like 4CrW2Si. 5CrW2Si is made by adding 2.00%~2.50% tungsten on the basis of chromium silicon steel. Thanks to the addition of tungsten, it helps to maintain relatively fine grains during quenching. This makes it possible to get higher toughness in the tempered state. Improve tempering stability. The steel also has certain hardenability and high-temperature mechanical properties.

5CrW2Si Mold Steel

5CrW2Si Worldwide equivalents

Grade5CrW2Si45WCrV845WCrW/ 1.2542BS1
StandardAS1M/UNSroct SS

5CrW2Si Steel Chemical Composition

0.45-0.550.50-0.80≤0.40≤0.030≤0.0301.00-1.30allowable residual content ≤0.25allowable residual content ≤0.302.00-2.50

5CrW2Si Steel Mechanical Properties

Rp0.2 (MPa)
Rm (MPa)
KV (J)
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated ConditionHBW
413 (≥)385 (≥)121111Solution and Aging, Annealing, Ausaging, Q+T,etc343

5CrW2Si Steel Physical properties

Temperature T
Specific heat
J / kgK
Thermal conductivity
994 (≥)291 (≥)144134
Creep strain limit
(Rp1,0) N/mm2
Creep rupture strength
(Rp1,0) N/mm2
Electric resistance
478363884Solution and Aging, Annealing, Ausaging, Q+T

Heat Treatment 

Steel ingot: heating temperature 1180~1200℃, initial forging temperature 1150~1170℃, final forging temperature ≥850℃, slow cooling.

Billet: heating temperature 1150~1180℃, initial forging temperature 1120~1150℃, final forging temperature ≥850℃, slow cooling.

Normal annealing specification:

Temperature 800~820℃ Critical point temperature (approximate value) Ac1=755℃, holding time 3~4h, and then slowly cooling to temperature ≤600~650℃ at a cooling rate of ≤30℃/h, and then air cooling out of the furnace. Heat treatment specification: sample quenching 860~900℃, oil cooling.

The high temperature tempering specification temperature is 710~740℃, after soaking, the holding time is 3~4h, and then the furnace is cooled or the furnace is air cooled.

The standard temperature of isothermal annealing is 750~760℃, holding for 8~10h, and then slowly cooling to temperature ≤650℃ at a cooling rate of 10~20℃/h, and then air cooling out of the furnace. The hardness is 207~235HBS, and better processing performance can be obtained.

Features and Application

  • 1、Manufacturing blades for cutting metal, shovel blades for shoveling and rubbing wire boards, die for cold blanking and edge trimming, etc.
  • 2、Manufacturing large and medium-sized heavy-duty round shear blades, long shear blades, and shaped shear blades.
  • 3、Manufacturing punch punches for medium and thick steel plates, precision pressing dies, cold heading dies, etc.
  • 4、Making manual and pneumatic chisels, air hammer tools, rivet tools, and cold punching dies.
  • 5、When used as hot processing steel, it can be used for punching, piercing tools, shearing dies, hot forging dies, and die-casting dies of fusible alloys.
  • 6、Manufacture of metal cutting blades and shovel blades for shoveling and rubbing wire plates.
  • 7、Die for cold blanking and trimming.


5CrW2Si Steel products

Product typeProductsDimensionProcessesDeliver Status
Plates/SheetsPlates/Sheets0.08-200mm(T)*W*LForging, hot rolling, and cold rollingAnnealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel BarRound Bar, Flat Bar, Square BarΦ8-1200mm*LForging, hot rolling and cold rolling, CastBlack, Rough Turning, Shot Blasting,
Coil/StripSteel Coil/Steel Strip0.03-16.0x1200mmCold-Rolled&Hot-RolledAnnealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes/TubesSeamless Pipes/Tubes, Welded Pipes/TubesOD:6-219mm x WT:0.5-20.0mmHot extrusion, Cold Drawn, WeldedAnnealed, Solution and Aging, Q+T, ACID-WASHED