A32 Chrome Moly TIG Welding Rods

A32 Chrome Moly TIG Rods 

A32 chrome moly TIG rods are low-alloy filler metals designed for TIG (GTAW) welding of chromium-molybdenum (Cr-Mo) steels, typically equivalent to grades such as 2.25% chromium / 1% molybdenum (e.g. P22). These rods are specifically formulated for high-temperature and high-pressure service, where strength, creep resistance, and structural integrity are critical. Supplied in 5Kg packs.

Why Use A32 Chrome Moly TIG Rods?

Designed for Cr-Mo Steels

A32 TIG rods are matched to 2.25Cr-1Mo alloy steels, ensuring compatibility with base materials commonly used in:

• Pressure vessels

• Power generation plant

• Boiler systems

• High-temperature pipework

Using a matching filler helps maintain the mechanical and metallurgical properties required for demanding service conditions.

Excellent High-Temperature Strength

Chrome moly alloys are known for their ability to retain strength at elevated temperatures. A32 weld metal provides:

• High tensile and yield strength

• Resistance to softening under heat

• Stability in long-term service

This makes them suitable for applications operating in the creep range (typically 400°C–600°C and above).

Creep Resistance

One of the key reasons to use A32 rods is their resistance to creep deformation, which occurs when materials are exposed to stress at high temperatures over time. The chromium and molybdenum content helps:

• Maintain structural integrity under continuous load

• Reduce deformation in high-pressure systems

• Extend service life of welded components

Good Resistance to Thermal Fatigue

A32 weld deposits perform well under thermal cycling conditions, where repeated heating and cooling can cause material fatigue. This is critical in systems such as:

• Steam lines

• Boilers

• Heat exchangers

Controlled Weld Metal Properties

These rods are engineered to produce welds with:

• Consistent hardness levels

• Good ductility after heat treatment

• Reliable impact resistance

They are typically used in conjunction with preheat and post-weld heat treatment (PWHT) to achieve optimal mechanical properties and reduce the risk of cracking.

Suitable for High-Integrity Welding

A32 TIG rods are commonly used in applications requiring coded or critical welds, where failure is not acceptable. Their controlled chemistry ensures:

• Low risk of hydrogen cracking (when proper procedures are followed)

• Good weld metal cleanliness

• High reliability in service