Nástrojová ocel 6CrW2Si

AOBO STEEL – Trusted Global Tool Steel Supplier

6CrW2Si tool steel is a versatile alloy tool steel suitable for both cold and hot working applications, characterized by its impact toughness and wear resistance. Compared to the 4CrW2Si and 5CrW2Si grades, 6CrW2Si typically achieves higher hardness after quenching and exhibits better strength at elevated temperatures.

1. Chemical Composition(GB/ T 1299—2000)

C	Si	Mn	Cr	W	P	S
0.55 ~ 0.65	0.50 ~ 0.80	≤0,40	1.10 ~ 1.30	2.20 ~ 2.70	≤0,030	≤0,030

2. Critical Point Temperature of 6CrW2Si

Kritický bod	Ac1	Ac₃	paní
Temperature (Approx. Value) /°C	775	810	280

3. Forging Process Specification for 6CrW2Si Steel

Položka	Heating Temperature/°C	Initial Forging Temperature/°C	Final Forging Temperature/°C	Chlazení
Ocelový ingot	1170 ~ 1200	1150 ~ 1180	≥850	Pomalé chlazení
Ocelový předvalek	1150 ~ 1170	1100 ~ 1140	≥800	Pomalé chlazení

Please fill out the form to contact us to get the most competitive quotation for 6CrW2Si steel.

4. Tepelné zpracování for 6CrW2Si Steel

1) Preheating of 6CrW2Si

Preliminary Heat Treatment Plan	Procesní parametry
Post-forging General Annealing	Heating temperature is 800 ~ 820°C, hold for 3 ~ 5h, furnace cool to below 550°C, then air cool. Hardness is 229~285HBW. Microstructure is granular pearlite + small amount of carbides.
High-temperature Tempering Process	Heating temperature is 700 ~ 730°C, hold for 2 ~ 4h, furnace cool to below 500°C then air cool. The purpose is to improve the machinability of the steel.

2) Quenching of 6CrW2Si

Quenching Temperature/°C	Quenching Cooling Medium	Quenching Cooling Medium Temperature/°C	Cool to	Tvrdost HRC
860 ~ 900	Olej	20 ~ 40	Oil Temperature	≥57

3) Tempering of 6CrW2Si

① Tempering Process Specification

Účel	Tempering Temperature/°C	Heating Medium	Chladicí médium	Tvrdost HRC
Eliminate internal stress and stabilize microstructure	200 ~ 250	Oil or molten salt	Vzduch	53 ~ 58
Reduce hardness and eliminate internal stress	430 ~ 470	Air furnace or molten salt, saltpeter	Vzduch	45 ~ 50

② Relationship between Hardness and Tempering Temperature

Tempering Temperature/°C	Není temperovaný	100	200	300	400	500	550	600
Tvrdost HRC	59	58	56	53	49	42	38	35

Note: 880°C oil quenched.

5. Mechanical Properties

6CrW2Si steel possesses relatively high toughness, high as-quenched hardness, a certain degree of high-temperature strength, and high fatigue strength. It exhibits slight temper brittleness when tempered in the range of 300-350°C. The hardness can reach 54-56 HRC after tempering at 250°C, and 50-52 HRC after tempering at 450°C. This steel’s resistance to tempering and its wear resistance are slightly superior to those of 5CrW2Si steel, but its toughness is comparatively lower.

Chromium-tungsten-silicon (Cr-W-Si) series steels demonstrate high sensitivity to decarburization, and their quenching deformation is difficult to control. Under abrasive wear conditions, they show insufficient wear resistance, and their impact toughness is lower than that of impact-resistant steels containing Molybdenum (Mo) and Nickel (Ni).

6. Applications

6CrW2Si steel is often used to manufacture heavy-duty stamping dies and cold-pressing dies where the failure modes are wear and collapse, or for manufacturing tools and dies that are subjected to impact loads and require high wear resistance, such as pneumatic tools, impact dies, cold shearing blades, blanking and trimming dies, and tools for air hammers.

7. Ekvivalentní známky

USA (ASTM/AISI): S1
Německo (DIN): 60WCrV7 or 1.2550
Rusko (GOST): 5KHV2S
Europe (EN): 60WCrV8

Get a Competitive Quote for 6CrW2Si Tool Steel

With over 20 years of forging expertise, Aobo Steel is your trusted partner for high-performance 6CrW2Si tool steel. We provide not just materials, but solutions. Leverage our deep industry knowledge and reliable supply chain for your project’s success.

✉ Contact us by filling out the form below.

Naše produkty