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

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

Thanks to its increased silicon content, the wire impresses with excellent welding properties, a calm arc behavior, and a clean weld surface. The corrosion resistance of the weld metal corresponds to that of similar stabilized austenitic stainless steels. The weld metal also remains tough down to -196 °C and is suitable for operating temperatures up to 400 °C.

Properties

• High-alloy, non-corroding solid wire

• Material type 347Si / G 19 9 Nb Si

• Excellent corrosion resistance

• Niobium-stabilized against intergranular corrosion

• Very good flow properties due to increased silicon content

• Calm arc and low spatter formation

• Tough down to -196 °C

• Continuous operating temperature up to 400 °C

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

Suitable Base Materials

The Thermanit H-347 Si is suitable, among others, for welding the following materials:

• 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 from material groups AISI 302, 304, 304L, 304LN, 321 and 347.

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 %

• 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