ThePipingMart Blog Grades Alloy Steel Grade WC6 – Composition, Properties, and Uses

Alloy Steel Grade WC6 – Composition, Properties, and Uses

Alloy Steel Grade WC6

Are you searching for a corrosion-resistant steel alloy with superior heat resistance and machinability? Look no further than Alloy Steel Grade WC6. This type of steel is one of the most versatile alloys available, offering a wide range of properties that make it suitable for many different applications. In this blog post, we will take a look at the composition, mechanical properties, physical properties, uses, and machining and welding techniques associated with Alloy Steel Grade WC6.


Grade WC6 is an iron-based alloy that contains 1.25% chromium, 0.5% molybdenum, and 0.25% vanadium. It also contains trace amounts of manganese, silicon, copper, sulfur, phosphorus, carbon, nickel and nitrogen which contribute to its unique characteristics. The combination of these elements gives Alloy Steel Grade WC6 excellent strength and toughness as well as superior wear resistance and corrosion resistance.

Carbon: 0.20% Max
Manganese: 0.40 – 0.70%
Silicon: 0.75% Max
Phosphorus: 0.04% Max
Sulfur: 0.045% Max
Chromium: 4.00 – 6.50%
Nickel: 0.50% Max
Molybdenum: 0.45 – 0.65%
Tungsten: 0.10% Max
Copper: 0.50% Max
Residual Elements: 1.00% Max

Mechanical Properties

The mechanical properties of Alloy Steel WC6 include high tensile strength (up to 1250 MPa) along with good ductility and impact strength (both 20J). Additionally, it has a yield strength of 880 MPa and an elongation percentage after fracture (A%) of 20%. These properties make it ideal for applications that require high levels of durability or load-bearing capabilities such as bolts or shafts in machinery or heavy equipment components.

Tensile Strength 90 – 115 ksi
Yield Strength 60 ksi Min
Elongation at 2 in 18% Min
Reduction of Area 35% Min

Physical Properties

The physical properties of Alloy WC6 include a density of 7.85 g/cm3 and a melting point range between 1450 – 1500°C. It has excellent thermal conductivity (20 W/mK) along with good electrical resistivity (0.17 Ω · m). Additionally, it has low thermal expansion coefficients which make it suitable for use in extreme temperature environments such as oil refineries or chemical plants where temperatures can vary drastically from day to day or hour to hour.


Due to its excellent corrosion and heat resistance properties, Steel WC6 is often used in industries with highly corrosive chemicals, such as petrochemical processing plants or automotive manufacturing facilities where exposure to oil is common. Additionally, the strength and toughness provided by the alloy makes it well suited for use in applications requiring high stress levels such as bearings or valves in pumps or compressors where temperatures can fluctuate severely from time to time due to pressure changes within the system they are installed on.

Corrosion Resistance

Alloy Steel Grade WC 6 offers superior corrosion resistance compared to other materials due to its chromium content, which acts as an effective barrier against oxidation caused by moisture or other corrosive agents in the environment surrounding the component made from the alloy itself. Its ability to resist oxidation makes it ideal for use in industries dealing with highly corrosive materials like acids or alkalis where prolonged contact would cause significant damage if not properly protected against oxidation by using an appropriate alloy material like Alloy Steel grade WC 6.

Heat Treatment

Heat treatment is essential for improving the performance characteristics associated with any metal material including that found in Alloy Steel gradeWC 6 . Through proper heat treatment processes such as hardening or tempering , this particular steel alloy can be tailored towards specific requirements ensuring optimal performance characteristics depending on the application needs being filled by the component made from this particular alloy material .

Machining And Welding

Machining operations are relatively easy when working with this type of steel alloy due to its over size ductility and toughness properties, allowing it to easily be formed  and cut into parts using conventional techniques and specifically designed machines or cutters . Welding operations are also possible using conventional welding methods including MIG welding , TIG welding , Stick welding , etc., though care must be taken during preparation phases since preheating may be required depending on weld joint configuration parameters .


In conclusion , Alloy Steel Grade WC6 is a complex but highly versatile alloy material with many advantages in areas with high temperature variations or corrosive risk environments . Its combination of high strength , toughness , wear resistance and good corrosion resistance make it ideal for use in applications such as valves pumps bearings and machinery components where long term durability and reliability are essential requirements . Furthermore , proper machining techniques and appropriate heat treatment processes can be used to tailor its performance according to the application needs being filled by the component made from this particular alloy material . With this knowledge now at your disposal , you should have no issue finding an appropriate application for your own projects utilizing this powerful yet complex steel alloy !

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