§ Standards
Status
CURRENT
Last verified
2026-09-06
CEN · GUIDANCE
EN
grade system
EN structural steel grade designation system
Overview
What this standard covers
How an EN designation is read: S for structural, the number as minimum yield strength in N/mm², then the sub-grade letters that set impact energy and test temperature.
How an EN designation is read: S for structural, the number as minimum yield strength in N/mm², then the sub-grade letters that set impact energy and test temperature.
Who uses it
Engineers and buyers comparing grades between national systems before substitution.
Details
Reference data
- Standard number
- EN grade system
- Title
- EN structural steel grade designation system
- Organisation
- CEN
- Country
- European Union
- Region
- European Union
- Subject
- Steel grade equivalents
- Subcategory
- Designation
- Type
- GUIDANCE
- Application
- Guidance
- Availability
- Free
- Status
- CURRENT
- Roles
- material standard
- Last verified
- 2026-09-06
Official source: steelconstruction.info
Related
Standards used alongside this one
- EN 10025-2
Hot rolled structural steels — Non-alloy structural steels
The European source standard for S235, S275 and S355 grades and their impact sub-grades.
European UnionMaterialsCURRENTPaid
- ASTM A992/A992M
Structural Steel Shapes
The standard grade for US wide flange shapes, with 50 ksi minimum yield, a maximum yield to tensile ratio and a carbon equivalent limit for weldability.
United StatesMaterialsCURRENTPaid
- ASTM / EN comparison
Comparing ASTM and EN structural grades
A992 and S355 sit close on yield strength but differ on impact requirements, chemistry limits and thickness effects, so they are comparable rather than interchangeable.
United StatesSteel grade equivalentsCURRENTFree
- GB / EN comparison
Comparing GB grades with EN and ASTM grades
Q355 and S355 share a nominal yield strength but differ in quality suffix meaning, impact testing and delivery condition, so certificates must be read rather than assumed.
ChinaSteel grade equivalentsCURRENTFree
- IS / EN comparison
Comparing IS 2062 grades with EN and ASTM grades
E250 and E350 are often compared to S235 and S355, but quality class, impact testing and chemistry limits must be checked before substitution.
IndiaSteel grade equivalentsCURRENTFree
Sourcing, review and use
Status
Editorial reference information compiled and maintained by the StructuralSteel.ai team. It is not a design certificate and is not issued under an engineer's seal.
Last reviewed
Calculations
Any figures produced on this page are indicative estimates for early sizing and comparison only — they are not engineered design outputs.
References
Final member selection, loading, connection design, fire design, fabrication and compliance must be verified for your specific project by a suitably qualified structural engineer. Standards are revised; check the edition in force where the work is built.
Verification
StructuralSteel.ai provides technical reference information and links to authoritative sources. Project specifications, applicable legislation, current standards editions and requirements of the responsible engineer or authority should always be verified before fabrication or supply.