MIG wire BOHLER Thermanit X 1.0/15kg (ER307LSi) 70776

BÖHLER Thermanit X MIG Wire 1.0 mm / 15 kg (G 18 8 Mn / ER307 mod.) – 70776

BÖHLER Thermanit X is a high-alloy austenitic solid welding wire designed for MAG welding of dissimilar steels, high-strength structural materials, and for creating ductile surfacing layers. It corresponds to classification EN ISO 14343-A: G 18 8 Mn and AWS A5.9: ER307(mod.), with material number 1.4370.

The high content of chromium, nickel, and manganese creates an austenitic weld metal with high ductility, toughness, and resistance to cracking. The wire is particularly suitable for demanding combinations of base materials where the use of conventional welding wires may be problematic. It is used for joining unalloyed and low-alloy steels to austenitic stainless steels, for welding manganese steels, refined steels, armour plates, and for creating buffer layers before further surfacing.

Thermanit X is suitable for producing transition weld joints between austenitic and ferritic steels, with a recommended maximum operating temperature of 300 °C for such dissimilar joints. The weld metal exhibits scaling resistance up to 850 °C, but at temperatures above 500 °C, it does not have sufficient resistance in sulphur-containing flue gas environments. When welding dissimilar steels, it is necessary to control the heat input to limit the formation of brittle martensitic transition zones.

Shielding gases of groups M1, M2, and M31 according to EN ISO 14175 and a direct current with positive wire polarity DC+ are used for welding. The specific shielding gas mixture and welding parameters are selected according to the combination of materials being welded and the technological procedure.

The wire with a diameter of 1.0 mm is suitable for precise and controlled welding, repairs, and surfacing. It is supplied on a 15 kg spool and is intended for professional use in mechanical engineering, repair services, energy, industrial maintenance, and the production of special steel structures.

Main advantages:

• High-alloy austenitic welding wire BÖHLER Thermanit X
• Classification G 18 8 Mn / ER307(mod.)
• Material number 1.4370
• Suitable for welding dissimilar steels
• Enables the joining of ferritic and austenitic materials
• High ductility and toughness of the austenitic weld metal
• Excellent resistance to weld cracking
• Suitable for welding high-strength and refined steels
• Option for use in welding manganese steels
• Suitable for armour plates and demanding repair work
• Use for ductile buffer layers during surfacing
• Scaling resistance up to 850 °C
• Austenitic-ferritic transition joints with a recommended operating temperature up to 300 °C
• Option to use shielding gases of classes M1, M2 and M31
• Direct current welding DC+
• Diameter 1.0 mm suitable for controlled welding and surfacing
• Professional packaging 15 kg spool

Classification:

Chemical composition:

Typical chemical composition of Thermanit X welding wire according to BÖHLER technical data. Values do not represent a chemical analysis of a specific production batch.

Mechanical properties:

Reference mechanical properties of the pure weld metal as stated in the product technical documentation. Actual values depend on the welding conditions used and the specific production batch.