Free Engineering Tool
Steel Grade Equivalent & CE Calculator
Cross-reference steel grades across EN, AISI, DIN, JIS standards. Calculate carbon equivalent (CE), weldability, and preheat temperature.
Results
| EN | W.Nr. | AISI | DIN | JIS | Type | CE |
|---|
Carbon Equivalent — IIW Formula
Carbon Equivalent — Pcm (Ito-Bessyo)
Better for low-carbon microalloyed steels (C < 0.18%):
Note: this calculator has no boron input and computes Pcm with B = 0 (valid for boron-free steels). For boron-treated steels, add 5×B (mass-%) to the result.
Weldability Classification
| CE Range | Weldability | Preheat |
|---|---|---|
| < 0.35 | Good | None / optional |
| 0.35 – 0.40 | Good–Fair | 50–100 °C for t > 25 mm |
| 0.40 – 0.45 | Fair | 100–150 °C |
| 0.45 – 0.50 | Fair–Poor | 150–200 °C |
| 0.50 – 0.60 | Poor | 200–250 °C |
| > 0.60 | Very Poor | 250–300 °C, special procedures |
Practical Example
Typical composition: C=0.18, Mn=1.50, Cr=0, Mo=0, V=0.05, Ni=0, Cu=0
CE = 0.18 + 1.50/6 + (0+0+0.05)/5 + (0+0)/15 = 0.18 + 0.25 + 0.01 = 0.44
Weldability: Fair → Preheat 100–150 °C recommended for t > 20 mm
Nikolai Shelkovenko
Nikolai Shelkovenko is a vibration analysis engineer and the founder and CEO of Vibromera. For more than 15 years he has balanced rotating equipment in the field rather than on a test bench: mulchers, industrial fans, crushers, centrifuges, shafts and spindles. That work is what the Balanset instruments grew out of — they were designed as a tool a specialist can carry to the machine and use alone, on site, not as laboratory equipment. Vibromera was founded in 2017 and has been based in Porto, Portugal, since 2023. Development, assembly and support of the Balanset line all happen here. The flagship instrument is the Balanset-1A, a portable analyser for single- and two-plane balancing and for vibration diagnostics. Nikolai is personally involved in customer support, in working through difficult balancing cases and in the development of the software. He works with customers worldwide, in any language.
