Solid Wire Rod BA-TIG 420 for TIG Welding

SFA 5.9: ER420

Main Application

BA-TIG 420 is a solid wire rod for GTAW, often used for surfacing applications which need superior resistance to abrasion. It requires preheat and inter-pass temperatures ≥ 225ºC, followed by slow cooling. Post weld heat treatment is used to temper the weld deposit. BA-TIG 420 is similar to BA-TIG 410, but with higher chromium and carbon content which increases the wear resistance.

Typical analysis and chemical composition acc. to AWS A5.9

Wire electrodeCSiMnMoNiCrPSCu total
Typical analysis BA-TIG 420 0.3 0.35 0.45 0.25 0.3 13.0 0.02 0.02 0.3
ER420 acc. to AWS A5.9 0.25 - 0.4 0.5 0.6 0.75 0.6 12.0 - 14.0 0.03 0.03 0.75

All - Weld Metal Mechanical Properties / Welding Data:

Heat Treatment

PWHT: 750°C x 1h

Yield Strength Re, N/mm² (ksi)

≥ 400 (58)

Tensile Strength Rm, N/mm² (ksi)

≥ 470 (68)

Elongation A5 [%]

≥ 16

Impact Energy ISO-V, J (ft lbs)




DC -

Shielding Gas

ISO 14175: I1

Base Materials

AISI 420, X12Cr13: hardfacing results in higher hardness than with ER410.

Suitable fluxes: BF 38, WP 380

Flux type suitability is strongly dependent on its application. In combination with the wire electrode the most suitable flux should match the requirements of the plate material as closely as possible under the existing welding conditions. Further information can be obtained from the technical flux data sheets.

Package Forms

5 kg carton boxes as standard package form for GTAW wire rods.


1,6 - 2,4 mm; sizes and tolerances acc. to ISO 544 and AWS A5.9.

Wire Electrode Surface

Smooth finish free from surface defects and foreign matter.


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