XX921.T.035.36A - P-20 Tool Steel TIG Rod 0.035" - 10lb Tube

Precision P-20 Tool Steel TIG Rod for Industrial Mold Repair

The XX921.T.035.36A P-20 TIG Rod is a premium-grade welding consumable specifically engineered for the maintenance and repair of plastic injection molds, compression molds, and die-casting dies. Manufactured to strict metallurgical standards, this rod conforms to the AISI P-20 classification, a widely used chrome-molybdenum tool steel known for its excellent toughness and moderate hardness. This 10lb tube of 0.035" (0.9mm) cut lengths provides the precision required for fine detail work, such as rebuilding parting lines, repairing gate areas, or correcting machining errors on expensive mold bases.

In the industrial sector, the integrity of a mold repair is measured by its invisibility. This P-20 filler metal is formulated to match the chemistry and mechanical properties of standard P-20 mold steels (such as 1.2311 or 1.2312). This ensures that the weld deposit responds to heat treatment, machining, and polishing in the same manner as the base metal. When properly applied, the weld zone exhibits a uniform hardness—typically in the range of 29-32 HRC as welded—which eliminates "hard spots" or "soft spots" that can cause deviations in surface finish or photo-etching textures. This consistency is critical for mold makers who require a seamless transition between the original steel and the repaired section.

The 0.035-inch diameter is particularly advantageous for microscopic welding or low-heat input applications where minimizing the heat-affected zone (HAZ) is paramount. Excessive heat can cause distortion or cracking in hardened tool steels; therefore, using a smaller diameter wire allows for finer control of the arc and puddle. This product is supplied in a durable 10lb tube, ensuring the rods remain straight, clean, and free from atmospheric contaminants that could introduce porosity into the weld. For industrial supply managers and tool room supervisors, stocking this P-20 rod ensures that downtime is minimized and mold assets are returned to production specifications with the highest quality repairs.

Technical Compatibility

This alloy is compatible with most pre-hardened tool steels and is designed to be used with 100% Argon shielding gas. It is an essential inventory item for tool and die shops, plastic manufacturing facilities, and specialized welding repair outfits.