High speed steel is a group of alloys that have impressive characteristics in high-speed and high-abrasion applications such as cutting and drilling.
Some of these alloys include some quantity of tungsten, particularly the tungsten and molybdenum series. Griggs Steel offers many of these alloys to help our customers get the best combination of cost, hardness, wear resistance, toughness and machinability.
High Speed Tool Steel With Tungsten
High speed steel is very commonly used in tooling applications. They are complex iron-base alloys and may include some combination of carbon, chromium, vanadium, molybdenum and tungsten. Many of the alloys carried by Griggs Steel feature at least some tungsten content.
Tungsten adds hardness and wear resistance to HSS alloys. In particular, it adds to hot hardness, causes secondary hardening and enhances resistance to tempering.
Many of the first high speed steels incorporated high tungsten content. However, some other alloys have reduced this amount while also including molybdenum to increase hardness at a lower weight.
Types of Tungsten High Speed Steel
There are two major categories of HSS including tungsten, the T series and the M series. They have significantly different amounts of the element, changing their characteristics.
- T Type: T series alloys contain 12 to 20% tungsten as well as varying amounts of chromium, vanadium, carbon and cobalt. Some T series alloys do not include any carbon. However, PM T15, the tungsten high speed steel alloy offered by Griggs Steel, includes 5% cobalt. PM T15 has a unique combination of wear-resistance, impact toughness and bend strength. Comapred to many other high speed tool steels, this alloy has impressive tool life. It is especially well-suited for cold work tooling.
- M Type: The M series alloys contain lower amounts of tungsten (between 1.25% and 10%). However, they make up for this in hardness by also include molybdenum. This element provides many of the same benefits as tungsten with a lower atomic weight. However, it has reduced hot hardness due to its lower melting point. The M series is often considered the go-to for most tooling applications. Griggs Steel offers M2, M3, M4, M7, M42, PM M4 and PM M48.
Additionally, we offer a few powdered metallurgy alloys that aren’t in the M series, including PM A11, PM 23, PM 30 and PM 60. These all include some amount of molybdenum and tungsten.
Benefits of Tungsten High Speed Tool Steel
The principal benefit of tungsten HSS is that it offers excellent hot hardness. Some molybdenum high speed steels make up for its lower melting point by adding vanadium. However, tungsten can offer the same benefits without the need for additional vanadium content.
Another key advantage of tungsten steel is that it has excellent bend strength. Therefore, it is often more robust in cold work applications compared to high-carbon, high-chromium steels.
Tungsten-molybdenum steels are often viewed as the gold standard because they combine the hot hardness of the former with the low weight of the latter. This is very desirable in high speed tool steel.
High Speed Tool Steel
Griggs Steel has established a reputation among tool steel suppliers for its excellent high speed steel. It is our specialty. We are so confident in our HSS that we offer a guarantee that if it should ever fail due to a defect in the metal, we will credit the cost of the steel plus any work you have into the tools.
We have flats, rounds, block and plate, powdered metal sheet and more available in PM T15 and our M series alloys. If you need excellent-quality tungsten high speed tool steel, Grigg Steel is the first supplier you should contact.