4122

The martensitic weld deposit is characterized by high wear resistance, even at elevated temperatures, and offers excellent resistance to water, steam, and diluted organic acids. It effectively withstands scaling up to 900 °C, making it ideal for high-quality overlays and deposits on unalloyed, low-alloyed steels and tool steels. Key applications include sealing surfaces on fittings, pistons, and rotor linings. Additional applications include rollers and molds for continuous wheel casting in the ceramics sector. Martensitic stainless steels, due to their carbon content, are frequently chosen for their corrosion resistance and exceptional mechanical strength in pumps, valves, and shafts for boats. They are also used to counter wear in cutlery, medical instruments (such as scalpels, razors, and surgical forceps), ball bearings, razor blades, polymer injection molds, and brake discs for bicycles and motorcycles. Prior to welding, it is essential to clean the area until a bright metallic finish is achieved. The preheating temperature should range between 150 and 400 °C, depending on the size of the piece and the base material. Slow cooling is recommended and, if necessary, a tempering process.

Martensitic steel for wear and corrosion resistant hardfacings.

The microstructure comprises tempered martensite and some carbide.

Surfacing can be performed on all weldable base materials, unalloyed and low-alloyed. Welding of corrosion resistant chromium steels as well as other similar-alloyed steels with C-contents up to 0.20% (repair welding).

• EN W.Nr.: 1.4122 (39CrMo17-1), 1.4113 (6CrMo17-1), 1.4513 (2CrMoTi17-1)
• ASTM: 440C, 434, 436
• UNS: UNS S S43400, 43600