P20+Ni / 1.2738 Welding Wire

Material: DIN 1.2738 (Equiv. ASSAB 718 / 718H)

Hardness: 33–38 HRC

🧊 Nickel-Added Pre-Hardened Mold Steel

Application & Industry Performance: Premium choice for large plastic injection molds, automotive bumpers, dashboard cores, and TV casing tooling. Added Nickel (~1.0% Ni) ensures uniform cross-section hardness, excellent photo-etching texturing, and flawless polishability.

P20+Ni 1.2738 TIG and Laser Welding Wire Sealed Packaging

Select Welding Process & Diameters

Choose between Laser Welding or TIG Welding wire specifications.

0.15

Spool / Rods

0.2

Spool / Rods

0.3

Spool / Rods

0.4

Spool / Rods

0.5

Spool / Rods

0.6

Spool / Rods

Custom

Other Sizes

0.8

10 rods / tube

1.0

10 rods / tube

1.2

10 rods / tube

1.6

10 rods / tube

2.0

10 rods / tube

2.4

10 rods / tube

Custom

Other Sizes

TECHNICAL DATA SHEET (TDS) & PROCESS GUIDE Standard: DIN 1.2738 / 40CrMnNiMo8-6-4 (Equiv. ASSAB 718 / 718H)

1. Chemical Composition (wt%)

Element	C	Si	Mn	Cr	Ni	Mo	Fe
Specification	0.35–0.45	0.20–0.40	1.30–1.60	1.80–2.10	0.90–1.20	0.15–0.25	Balance

2. Hardness & Welding Parameters

⚡ Laser Welding 0.15–0.6 mm

Preheat Temp	Room Temp – 100°C
Pulse Power	100–190 A
Shielding Gas	Argon ≥99.99% (3–5 L/min)
HAZ Impact	Zero sink marks around micro-repair area

🔥 TIG Welding 0.8–2.4 mm

Preheat Temp	180°C – 220°C Recommended
Welding Current	40–110 A (DCEN)
Shielding Gas	Argon ≥99.99% (8–10 L/min)
Post-Heat Relief	Slow natural cooling

💡 Key Repair & Operation Instructions:

Nickel Addition Advantage: The ~1.0% Ni addition improves hardenability across thick mold sections, ensuring deposited weld metal reaches 33–38 HRC and matches parent steel etching/texturing grain.
High-Finish Polishing: Exceptional micro-structure uniformity eliminates boundary halos during mirror polishing and grain texturing.