EN, SAE and DIN Grade Equivalents for Steel Billets
Approximate cross-reference between EN, SAE/AISI, DIN and JIS designations for common alloy steel billet grades.
Read this first
Equivalents are approximate. Limits for carbon, manganese and residuals differ slightly between standards. Always check the exact limits in your order.
Common equivalents
EN8 is close to C45 and SAE 1040/1045. EN19 is close to SAE 4140 and 42CrMo4. EN24 is close to SAE 4340 and 34CrNiMo6. EN31 is close to SAE 52100 and 100Cr6. 16MnCr5 and 20MnCr5 are German case hardening grades, with SAE 5115 and 5120 as rough American counterparts.
Why it matters
An EN drawing and an SAE purchase order can lead to a rejected lot if the limits are not the same. Quote the standard and edition on the order.
Individual grades
Each grade has its own page with chemistry, equivalents and uses. Start with the grade directory.
Related guides
What Is a Steel Billet? Sizes, Grades and Uses
A plain guide to steel billets: how they are made, typical sizes, grades and where they are used.
Billet Supply Conditions: Grinding, Heat Treatment and Terms
What to check on a billet order: cutting, heat treatment, spot or full grinding, weight tolerance and the chemistry guarantee.
How to Choose the Right Billet Size for Forging and Rolling
A method to match billet or bloom section to the finished forging or rolled section, using reduction ratio and yield.
Billet size chart · Weight calculator · Steel grade directory