Tempil MRK28047 Temperature Indicators Tempilstik 316 C/600 F

The Tempil MRK28047 is a Tempilstik temperature indicator, 316°C / 600°F, 10 per case.

At 600°F this crayon is as likely to be checking a maximum as a minimum, and that distinction is worth explaining because it is the half of temperature control people forget.

Welding procedures specify a preheat — a temperature the steel must reach before welding starts. Many also specify an interpass maximum: a temperature the steel must not exceed between passes. Both matter, and they matter for opposite reasons.

Preheat prevents cracking by slowing the cooling rate. Interpass maximum prevents the opposite problem: too much accumulated heat coarsens the grain structure and degrades toughness, and on some alloys it damages corrosion resistance. A welder running pass after pass on a hot joint can walk the temperature well past the ceiling without noticing, because the joint feels the same.

A Tempilstik checks a ceiling exactly as it checks a floor: if the mark melts, you are over. Stop and let it cool.

That is why a fabrication shop stocks a range of ratings rather than one — the procedure specifies both numbers.

The 10 per case quantity is shop packaging.

Applications include interpass temperature control, welding preheat, and heat treatment verification.

Brand

Tempil

SKU

MRK28047

Category

Painting & Marking Supplies

Weight

0.4 lbs

Dimensions

5.50 x 0.60 x 0.60

Price

$23.50

Availability

In stock

Rating

4.42 / 5.0