Welding wire Böhler Thermanit H-347 Si 1.4551

Böhler Thermanit H-347 Si solid wire – High-alloy stainless steel welding wire according to EN ISO 14343-A G 19 9 Nb Si

Böhler Thermanit H-347 Si is a high-alloy, stainless solid wire for MIG/MAG welding of stabilized and non-stabilized austenitic CrNi steels. Due to the niobium stabilization, this welding consumable is particularly suitable for applications requiring high resistance to intergranular corrosion as well as excellent toughness.

Thanks to its increased silicon content, the wire offers impressive welding properties, stable arc behavior, and a clean weld bead surface. The corrosion resistance of the weld metal matches that of equivalent stabilized austenitic stainless steels. The weld metal also remains impact-tough down to -196 °C and is suitable for service temperatures of up to 400 °C.

Features

• High-alloy, stainless solid wire

• Material type 347Si / G 19 9 Nb Si

• Excellent corrosion resistance

• Niobium-stabilized against intergranular corrosion

• Very good flow characteristics due to increased silicon content

• Stable arc and low spatter formation

• Cryogenic toughness down to -196 °C

• Continuous service temperature up to 400 °C

• Suitable for DC+ (direct current, electrode positive)

Suitable base materials

Thermanit H-347 Si is suitable for welding materials including the following:

• 1.4301 (X5CrNi18-10)

• 1.4306 (X2CrNi19-11)

• 1.4311 (X2CrNiN18-9)

• 1.4312 (GX10CrNi18-8)

• 1.4541 (X6CrNiTi18-10)

• 1.4546 (X5CrNiNb18-10)

• 1.4550 (X6CrNiNb18-10)

• 1.4552 (GX5CrNiNb19-11)

as well as comparable stainless steels in the AISI 302, 304, 304L, 304LN, 321, and 347 material groups.

Typical chemical composition

Mechanical properties of weld metal (typical values)

• Yield strength Rp0.2: approx. 400 MPa

• Tensile strength Rm: approx. 570 MPa

• Elongation at break: approx. 30 %

• Notch impact energy (20 °C): approx. 65 J

Processing instructions

• Current type: DC+

• Shielding gases according to EN ISO 14175:

  • M12

  • M13

• Maximum heat input: 1.5 kJ/mm

• Maximum interpass temperature: 100 °C

• Post-weld heat treatment is generally not required.

Approvals

• TÜV

• DB

• CE