130ksi

Chromium/molybdenum alloyed steel, low alloy, and high strength. Mainly used in the aerospace sector and in the construction of connecting rods for the automotive industry, it is also ideal for the creation of fasteners, gears, bolts, shafts, and similar parts. It is advisable to preheat according to the base material and thickness; however, for materials that can be welded with higher strength consumables, a minimum preheat of 100°C is generally required. Some HSLA steels may show a reduction in strength and toughness with interpass temperatures exceeding 200°C. Post weld heat treatment (PWHT) usually depends on the base material and the specific application.

Mn-Cr-Mo low alloy consumables for welding high strength steels with ultimate tensile strength up to 900 MPa (130 ksi).

The microstructure of all the consumables is predominantly ferrite; some will contain high proportions of acicular ferrite for optimum aswelded toughness.

This material is used for welding high strength steels such as 4130.

• ASTM: 4130, 8630, 4140