Martensitic stainless steel S41008 0Cr13 chemical composition

The Martensitic stainless steel S41008 0Cr13 belongs to the martensitic stainless steel category. Martensitic stainless steels are named for their martensitic microstructure, which is a crystalline structure which is based on the simple face-centered tetragonal lattice and is best known for its hardness and wear resistance. S41008 0Cr13 is an unalloyed martensitic stainless steel. It has good mechanical properties, plus good corrosion resistance and some weldability. This stainless steel can be used in many of the applications such as springs, screws, nuts, blades and disc springs.

Material overview

S41008 0Cr13 is an unalloyed martensitic stainless steel.It has good mechanical properties, plus good corrosion resistance and some weldability. As an unalloyed steel this material does not contain any additional elements and therefore has the lowest cost of all stainless steel grades. This material can be heat treated to achieve different levels of mechanical properties.

Mechanical Properties

At room temperature, the mechanical properties of S41008 0Cr13 are:

Tensile Strength (MPa) - 500-700

Yield strength (MPa) - 270

Elongation (%) - 20-30

Hardness (HV) - 210-269

Chemical composition

The chemical composition of S41008 0Cr13 is as follows:

Carbon 0.08%

Chromium 13%

Manganese 2%

Phosphorus 0.045%

Sulphur 0.030%

Silicon 1.026%

Iron Balance

Applications

S41008 0Cr13 has good mechanical properties and weldability, making it among the most versatile of the martensitic stainless steels. As such, it is used in a variety of applications such as springs, screws, nuts, blades and disc springs. Additionally, due to its low carbon content, it is also used in medical, chemical and corrosion resistant applications.

Weldability

S41008 0Cr13 is generally easy to weld, as compared to other martensitic stainless steels. It can be welded using both manual and automated processes. It requires preheating to be used in MIG and TIG welding processes, but can be used in gas and arc welding without preheating. It is recommended to be used with a stainless steel filler material and shielded with an argon-based gas.

Heat Treatment

The heat treatment of S41008 0Cr13 aims to further increase its hardness and wear resistance. The material can be low temperature hardened, but it is not recommended to exceed temperatures of 1050°C as it can lead to tensile or creep rupture. It responds well to tempering and should be heated for one to two hours at temperatures of 600-950°C to achieve enough hardening.

Conclusion

S41008 0Cr13 is an unalloyed martensitic stainless steel. It has good mechanical properties, plus good corrosion resistance and some weldability. As such, it is used in a variety of applications such as springs, screws, nuts, blades and disc springs. Additionally, it can be heat treated to achieve different levels of mechanical properties and welded using manual and automated processes.

Martensitic stainless steel S41008 (0Cr13) is a common grade of stainless steel with excellent properties of corrosion resistance, hardness and wearability. It is commonly used in food processing, beverage production, and industrial machinery applications.

Chemically, S41008 is an iron-chromium-carbon steel alloy containing 13% chromium and very small amounts of carbon, silicon, and manganese. This combination provides it excellent toughness, wear-resistance and corrosion-resistance -- making it a great choice for applications that may be subject to caustic chemicals, outdoor elements, and extreme temperatures.

Mechanically, S41008 has excellent strength and hardness. It can resist both general corrosion and localized pitting caused by chloride stress corrosion cracking. The chromium content provides it good oxidation resistance and excellent resistance to local corrosion should it be exposed to welding or other high-heat applications. One a passivatation step has been completed, it also offers excellent resistance to acids, alkalis and organic chemicals.

Due to its combination of properties, martensitic stainless steel S41008 is a versatile and cost-effective choice for many applications. We can make structural components, surgical implements, and food processing equipment out of it. In addition, it can be cost-effectively machined into shapes and dimensions that are otherwise not readily available in other grades of stainless steel.

In short, martensitic stainless steel S41008 offers a great value. Its excellent properties, relatively low cost and availability of custom shapes makes it an attractive option for many applications.