QuFe15 Bobbin – Laser Welding Wire Mould Steel CrMo2 / ER90S-B3 (1.7384)

QuFe15 is a CrMo2-alloyed filler metal for modifying and repairing mould cavities in the tempered materials 1.2311, 1.2312, 1.2162, 1.2738, 1.2764 and 1.2767. Standard: EN ISO 21952-A G/W ~CrMo 2 Si · AWS SFA-5.28 ER90S-B3 (material no. 1.7384). Achievable hardness: 28–37 HRC.

When QuFe15 instead of QuFe10? The datasheet explicitly names QuFe15 as an alternative to QuFe10 / QuFe10Cr / QuFe10NiMo — because of its different reaction to etchants and acids. Wherever a grain pattern or photo-etch has to run across the repair and the weld metal of the other wires stays visible in the etched surface, QuFe15 provides the matching etching behaviour.

Recommended base materials

• 1.2311, 1.2312 — quenched and tempered plastic mould steels
• 1.2738 — Ni-alloyed mould steel for large tools
• 1.2162, 1.2764, 1.2767 — further mould steels
• 10CrMo9-10, GS-12CrMo9-10 — creep-resistant CrMo steels

Typical applications

• Repairs to mould cavities that are subsequently etched or grained
• Photo-etching and texturing across the repair site
• Contour corrections on tempered mould steels
• Build-up welding on creep-resistant CrMo steels (10CrMo9-10)
• Alternative when the etched appearance of QuFe10 / QuFe10Cr / QuFe10NiMo does not match

Properties and advantages

• Different etching and graining behaviour compared with the QuFe10 series — the decisive lever when the repair has to disappear in the etched surface
• Achievable hardness 28–37 HRC — in the range of the base hardness of tempered mould steels
• Weld metal: Re 460 MPa · Rm 640 MPa · A 22 %
• Post-processing: EDM-machinable, texturable, polishable, chrome-platable, etchable, nitridable, hardenable

Bobbin form: K125, K250, K80, MA125, SH253 — wire weight 100 g–500 g, Ø 0,2 mm – 0,8 mm.

Material analysis (wt.-%)
C 0.1 | Si 0.6 | Cr 2.2 | Mn 1.00 | Mo 0.95 | Fe balance