Certified Thermomelt® 500°F / 260°C
Welding Temperature Indicator Stick
Surface temperature indicator stick — 33% larger, more durable, fewer replacements needed. Melts precisely at 500°F (260°C). NIST Traceable. Cr-Mo steel (P11, P22), heat-resistant low-alloy steel, pressure vessels.
* Images are illustrative — label colour may vary by production batch
Certified Thermomelt® 500°F / 260°C
Temperature indicator stick — 33% larger, NIST Traceable, no calibration required
Product Description
Certified Thermomelt® 500°F — Applications & Standards
Verify PWHT (Post Weld Heat Treatment) temperature — heat treatment after welding to relieve residual stress and improve microstructure. Certified Thermomelt (89xxx) is Nuclear/Military Certified, Low Chloride/Halogen — mandatory for nuclear power plants and military applications.
No power source and no periodic calibration required. When the crayon melts on the metal surface, the temperature has reached 500°F (260°C) — a clear visual result that can be photographed for on-site QA/QC records. 33% larger than Tempilstik® — saving replacement time, especially effective during long welding shifts at refineries, shipyards and offshore.
Technical Knowledge
Standards-based Usage Context
📐 Applicable Standard
ASME Section VIII, ASME B31.3, AWS D1.1 — PWHT requirements for Cr-Mo steel and pressure vessels.
Cr-Mo steel (P11, P22), heat-resistant low-alloy steel, pressure vessels.
PWHT — Post Weld Heat Treatment tempil.vn📏 Why is Thermomelt® larger?
33% larger — fewer interruptions on site
Thermomelt® is engineered with a stick 33% larger than Tempilstik®, a metal-shaft holder and a pocket clip. At large welding sites (EPC, power plants, shipbuilding) where welders must measure many points continuously, Thermomelt® significantly reduces the need for stick changes — improving productivity and reducing losses.
Detailed comparison: Thermomelt® vs Tempilstik® tempil.vn🔬 NIST Traceable
Traceable to US national standards
All Thermomelt® sticks are NIST Traceable (National Institute of Standards and Technology) — full calibration chain traceable to US national standards. Mandatory for many EPC, pressure vessel and power piping projects per ASME. Part #89500 achieves ±1%°F accuracy at 500°F.
ASME B31.3 — Temperature verification requirements tempil.vnFeatures
Key Advantages of Thermomelt®
- 33% larger than Tempilstik® — greater durability, less breakage, fewer replacements on site
- Melts precisely at 500°F (260°C) — ±1%°F tolerance, NIST Traceable
- Durable metal holder with pocket clip — non-slip grip, easy to clip to PPE pocket
- Gravity-advance holder — stick advances automatically, no slipping back
- No power, batteries or periodic calibration — ready to use immediately on site
- Meets ANSI/ASME Code B31.1, B31.3, ASME Sec. I, III, VII, AWS D1.1
- Made in USA — C/O, Certificate of Quality, full export documentation
- Nuclear/Military Certified — Low Chloride/Halogen/Sulfur < 250 ppm per nuclear industry requirements
Part Number Table
Nearby Temperature Grades
| Part # | °F | °C | Typical application |
|---|---|---|---|
| 89425 | 425°F | 218°C | PWHT stress relief, ASME B31.3 |
| 89450 | 450°F | 232°C | PWHT stress relief, ASME B31.3 |
| 89475 | 475°F | 246°C | PWHT stress relief, ASME B31.3 |
| 89500 ★ | 500°F | 260°C | PWHT stress relief, ASME B31.3 · This page |
| 89525 | 525°F | 274°C | PWHT stress relief, ASME B31.3 |
| 89550 | 550°F | 288°C | PWHT stress relief, ASME B31.3 |
| 89650 | 650°F | 343°C | PWHT stress relief, ASME B31.3 |
Applications
Industries That Use It Thermomelt®
(Pipeline welding)
(Jacket, Module)
(Pressure vessel)
(Shipbuilding)
(Power plant)
(PTSC, PVN)
FAQ
Frequently Asked Questions
❓ Difference
How does Thermomelt® differ from Tempilstik®?
Both are temperature indicator crayons from Tempil/Markal with the same ±1%°F accuracy. The difference: Thermomelt® has a stick 33% larger, a more durable metal holder with gravity-advance and pocket clip, and is NIST Traceable. Better suited for large projects, long welding shifts or NIST traceability requirements.
See the full detailed comparison tempil.vn❓ Documents
Does Certified Thermomelt® Part #89500 come with a C/O and Mill Certificate?
Có. Fast Group cung cấp đầy đủ C/O (Certificate of Origin — Made in USA), C/Q (Certificate of Quality), Technical Data Sheet tiếng Việt và hóa đơn VAT đủ điều kiện thanh toán dự án. NIST Traceable certificate có thể cung cấp theo yêu cầu.
Related Products
See Also
Certified Thermomelt® 500°F
Contact us for a quote with Technical Data Sheet and Nuclear/Military Certification Document.
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✔ NIST Traceable — full calibration chain traceability
✔ Full export documentation for customs & project payment
Technical Resources
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