Kilojoules per millimeter to travel speed
Type a value in kJ/mm to get it in mm/min instantly.
200mm/min
That's 2× as hot as sheet metal welding, while structural welding is 1.25× higher. A 200 A, 25 V arc would have to travel about 200 mm a minute.
What it means
How much heat goes in?
Heat input is arc energy times a process efficiency: about 0.8 for stick and MIG, 0.6 for TIG, and 1.0 for submerged arc.
The math
How to convert kJ/mm to mm/min
Heat input is arc energy over travel speed: kJ/mm = volts × amps × efficiency ÷ (travel in mm/s × 1000). A kJ/in is a kJ/mm divided by 25.4.
Example: 1.2 kJ/mm = 200 mm/min.
Every unit
Your heat input in every unit
Tables
kJ/mm to mm/min conversion table
| kJ/mm | mm/min |
|---|---|
| 0.2 kJ/mm | 1,200 mm/min |
| 0.4 kJ/mm | 600 mm/min |
| 0.6 kJ/mm | 400 mm/min |
| 0.8 kJ/mm | 300 mm/min |
| 1 kJ/mm | 240 mm/min |
| 1.5 kJ/mm | 160 mm/min |
| 2 kJ/mm | 120 mm/min |
| 2.5 kJ/mm | 96 mm/min |
| 3 kJ/mm | 80 mm/min |
| 4 kJ/mm | 60 mm/min |
| 5 kJ/mm | 48 mm/min |
mm/min to kJ/mm conversion table
| mm/min | kJ/mm |
|---|---|
| 0.2 mm/min | 1,200 kJ/mm |
| 0.4 mm/min | 600 kJ/mm |
| 0.6 mm/min | 400 kJ/mm |
| 0.8 mm/min | 300 kJ/mm |
| 1 mm/min | 240 kJ/mm |
| 1.5 mm/min | 160 kJ/mm |
| 2 mm/min | 120 kJ/mm |
| 2.5 mm/min | 96 kJ/mm |
| 3 mm/min | 80 kJ/mm |
| 4 mm/min | 60 kJ/mm |
| 5 mm/min | 48 kJ/mm |
Quick answers
Quick answers
- How many mm/min is 1 kJ/mm?
- 1 kJ/mm is 240 mm/min.
- How many mm/min is 10 kJ/mm?
- 10 kJ/mm is 24 mm/min.
- How many mm/min is 1.2 kJ/mm?
- 1.2 kJ/mm is 200 mm/min.
The units
About these units
Kilojoules per millimeter (kJ/mm)
The standard for welding procedure specifications.
Travel speed (mm/min)
How fast a 200 A, 25 V arc must move to give this heat input.
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