Welding wire Böhler Union X 90

Böhler Union X 90 solid wire

Union X 90 is a low-alloy, copper-coated solid wire electrode for gas metal arc welding (GMAW) of high-strength fine-grained structural steels. The welding wire is particularly suitable for quenched and tempered as well as thermo-mechanically rolled steels with minimum yield strengths up to approx. 890 MPa and is primarily used in the crane construction, vehicle manufacturing, and steel construction for high-strength structures industries.

Due to its special micro-alloying concept, Union X 90 offers good ductility even at very high strength levels, as well as high resistance to cold cracking. In the untreated as-welded condition, the weld metal achieves typical mechanical values of approx. 915 MPa yield strength, 960 MPa tensile strength, and 20% elongation. The notch impact energy is typically 130 J at +20 °C and at least 47 J at -60 °C using M21 mixed gas.

The wire is designed for welding with DC+ and can be used with shielding gases according to EN ISO 14175, in particular M20 and M21. Suitable base materials include S890Q, S890QL, alform® 900, and comparable high-strength fine-grained structural steels.

Technical data

Standard designation:
EN ISO 16834-A: G 89 6 M21 Mn4Ni2CrMo
AWS A5.28 / SFA-5.28: ER120S-G

Typical analysis:
C: 0.10%
Si: 0.80%
Mn: 1.80%
Cr: 0.35%
Ni: 2.25%
Mo: 0.60%

Available diameters:
1.0 mm / 1.2 mm

Approvals:
TÜV, DB, DNV, CE