Leeb to Brinell Conversion – Quick Reference & Full Chart
This guide lets you convert Leeb (HL) readings into Brinell (HB) in seconds. You’ll get:
- ✔️ A quick five-row reference chart
- ✔️ A 100-point full online chart
- ✔️ A formula and calculator link
Quick Reference – Carbon & Alloy Steels
| Leeb (HL) | Approx. Brinell (HB) |
|---|---|
| 780 | 415 |
| 760 | 400 |
| 740 | 385 |
| 720 | 369 |
| 700 | 352 |
Values based on average carbon steel; adjust ±3% for alloys.
📊 Need the full 100-point chart?
View it here:
https://www.testavor.ca/pages/leeb-to-brinell-conversion-chart
View it here:
https://www.testavor.ca/pages/leeb-to-brinell-conversion-chart
Quick Formula
For carbon steels:
HB ≈ (0.216 × HL) – 253
Accuracy ≈ ±4 HB between 300–450 HB. Verify with certified blocks for critical work.
FAQs – Leeb ➡ Brinell
Does this work for stainless?
Stainless deviates slightly. Use the full online chart or our multi-scale guide for alloy factors.
Best Leeb probe for castings?
The G-type impact device gives higher energy for rough surfaces.
Spec already lists HL — convert?
If your QA manual requires Brinell or Rockwell, yes. Check specs with our Compliance Checker.
More Tools
Need certified portable testers?
Browse TestersNote – Some links are affiliate links, which help keep our conversion tools free for Canadian QA teams.