130ksi

This high-strength, low-alloyed chromium/molybdenum filler metal is employed in various applications, including the aeronautical sector and the construction of connecting rods for the automotive industry. It is also utilized in fixing parts, gears, bolts, axes, and similar components. Preheating is recommended in accordance with the base material and its thickness. Materials likely to be welded using these higher-strength consumables typically require a minimum preheat of 100°C. For some high-strength, low-alloy (HSLA) steels, caution should be exercised, as interpass temperatures exceeding 200°C may lead to a reduction in strength and toughness. Post-weld heat treatment (PWHT) requirements generally depend on the specific base material and application, warranting consideration on a case-by-case basis.

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.