TS175 - Tempil 175 F Temperature Indicating Crayon

Essential Preheat Control for Welders

Achieving the correct preheat temperature is critical for preventing cracking and ensuring the metallurgical integrity of a weld. The Tempilstik 175°F (79°C) is a must-have accessory for any professional welder's toolkit, specifically designed to verify that base materials have reached the necessary thermal condition before the arc is struck. 175°F is a common preheat requirement for various thicknesses of mild and low-alloy steels, helping to drive out moisture and slow the cooling rate to prevent hydrogen-induced cracking.

Using the Tempilstik is fast and intuitive, allowing welders to focus on their work rather than fiddling with complex gauges. Simply mark the surface of the metal before heating. As you apply heat with a torch, watch the mark; the moment it turns from a chalky mark to a liquid smear, you know you have hit exactly 175°F. Alternatively, for checking interpass temperatures, you can stroke the stick across the hot metal between passes. If it melts on contact, the metal is at or above the rated temperature. This immediate feedback loop is vital for maintaining compliance with Welding Procedure Specifications (WPS).

Engineered to meet AWS D1.1, ASME Code Sec. I, III, and VIII, and ANSI/ASME Code B31.1 and B31.3, this temperature crayon ensures your work stands up to inspection. The formula is free of lead, sulfur, and halogens, ensuring it won't introduce contaminants that could weaken the weld or cause corrosion later, making it safe for use on sensitive alloys. Rugged, reliable, and requiring no batteries, the Tempilstik 175°F is the welder's trusted partner for thermal precision.

Welding Applications

• Preheating: Verify minimum temperature before welding to prevent cold cracking.
• Interpass Monitoring: Ensure the metal doesn't exceed maximum heat input limits between passes.
• Post-Weld Heat Treatment: Monitor temperatures during stress-relieving processes.
• Code Compliance: Meets strict requirements for nuclear and pressure vessel welding.