Qu4370 Bobbin – Laser Welding Wire ER307 / 18 8 Mn (1.4370) for Manganese Steel
€189.21
Qu4370 Bobbin – Laser Welding Wire ER307 / 18 8 Mn (1.4370) for Manganese Steel
Qu4370 is a manganese-alloyed filler metal to EN ISO 14343-A G/W 18 8 Mn · AWS SFA-5.9 ER307 (material no. 1.4370). The high manganese content of roughly 7 % produces an austenitic weld metal that is work-hardening: it goes into the seam soft and only hardens under load — from around 180 HB as welded to about 41 HRC after work-hardening.
That makes Qu4370 the wire for manganese steel and for joints that make other fillers crack: austenite-to-ferrite joints, armour steels, and heat-resistant Cr and CrNi steels.
What {code} is made for
- Manganese steels — joint and build-up welding
- Austenite-to-ferrite joints up to 300 °C service temperature
- Heat-resistant Cr and CrNi steels, e.g. in exhaust system manufacturing
- Armour steels
- Identical-type steels as well as buffer layers and build-ups
Typical applications
- Repairs to manganese steel components (crusher jaws, railway points, wear plates)
- Buffer layers and build-ups with wear-resistant, work-hardening weld metal
- Joints between austenitic and ferritic steels
- Components in exhaust system manufacturing (scale-resistant to approx. 850 °C)
- Components in contact with sea water or dilute acids
Properties and advantages
- Work-hardening — approx. 180 HB as welded, approx. 41 HRC after work-hardening: the seam hardens exactly where it is loaded
- Scale-resistant to approx. 850 °C
- Resistant to sea water and dilute acids; stainless
- Wear-resistant — very good for buffer layers and build-ups
- Weld metal: Re 400 MPa · Rm 650 MPa · A 35 %
- Limit: not sufficiently resistant to sulphurous gases above 500 °C
Bobbin form: K125, K250, K80, MA125, SH253 — wire weight 100 g–500 g, Ø 0,3 mm – 0,6 mm.
Material analysis (wt.-%)
C 0.08 | Si 0.95 | Mn 7.0 | P 0.035 | S 0.020 | Cr 18.0 | Ni 8.0 | Fe balance
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| Bobbin size: | K80, K125, K250, MA125, SH253 |
|---|---|
| Bobbin weight: | 100 g, 200 g, 500 g |
| Diameter: | 0,3 mm, 0,4 mm, 0,5 mm, 0,6 mm |
| Recommendations for basis material: | Hitzebeständige Cr- und CrNi-Stähle, Joining of dissimilar material, Manganhartstähle |
| Wire: | Laser welding wire |
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