Engineered Surface Treatment for High Pressure Die Casting Tooling

ASSAB Nitriding Solutions

Why Nitriding Matters in Die Casting

In today’s high-pressure die casting (HPDC) operations, tool life directly impacts productivity and profitability. Thermal fatigue, erosion, and soldering from repeated exposure to molten aluminium – particularly aggressive alloys like ADC14 – wear tooling down fast.

ASSAB offers precision-controlled nitriding to harden tool steels from the surface inward — enhancing wear resistance, improving thermal performance, and extending die life.

What Is Controlled Nitriding?

Nitriding is a surface hardening process that diffuses nitrogen into steel, forming hard nitrides with alloying elements like chromium, molybdenum, and vanadium.

Unlike conventional hardening methods, nitriding is done at 500–580°C, which reduces distortion and allows accurate treatment of finished components.

With advanced furnace systems from reputable manufacturers, ASSAB delivers nitriding treatments with:

Consistent case depth
Controlled white layer thickness
Minimal dimensional change
Repeatable results across batches

Key Benefits for HPDC Tooling

✔ Higher Surface Hardness
Achieve 900–1200 HV for enhanced wear and erosion resistance.

✔ Extended Tool Life
Reduces thermal fatigue cracking and micro-soldering over repeated casting cycles.

✔ Dimensional Accuracy Maintained
Low-temperature process prevents distortion in precision-machined tools.

✔ Eco-Friendly Process
Clean, energy-efficient, and aligned with sustainable manufacturing practices.

Where It Works Best

ASSAB nitriding is ideal for:

Core Pins
Shot Sleeves
Plunger Rods & Tips
Sprue Bushings
Fixed & Moving Cores
Die Inserts
Ejector Systems

These components face repeated contact with molten aluminium (up to 700°C), abrasive wear from silicon, and cyclic thermal shock — exactly the environment where nitriding excels.

Precision-Engineered Nitriding with ASSAB

At ASSAB, every nitriding cycle is custom-tuned to match your tool steel, part geometry, and specific die casting application — delivering optimal case depth, surface hardness, and white layer control without distortion or overprocessing. Our treatments are powered by advanced furnace systems which ensure:

Consistent results across complex tooling
Low-maintenance, clean processing
Full process data logging and traceability
Optional post-oxidation for added corrosion resistance

Why ASSAB

With ASSAB, you don’t just get a nitriding service — you gain a performance partner. Our team brings decades of expertise in tool steel metallurgy and heat treatment, collaborating closely with customers to improve tooling life, reduce downtime, and drive casting efficiency. From automotive to electronics, we support toolmakers and die casters across industries with globally backed, locally delivered solutions — helping you get more value from every tool, every cycle.