Strong Match — 89.7% match
based on chemical composition and mechanical property overlap.
EN 10025-3 S420N (EN 10025-3:2019) and GB/T 1591 Q420MD (GB/T 1591:2018) are both steel grades.
Both fall under the Structural Steel category.
EN 10025-3 S420N is defined under European Standard (EN), originating from Europe, while GB/T 1591 Q420MD is defined under Guobiao Standards (GB/T), originating from China.
As per chemical composition, EN 10025-3 S420N vs GB/T 1591 Q420MD is a 84.5% match.
As per mechanical properties, the match is 100%.
Combined, this makes them a strong match overall at 89.7%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
EN 10025-3 S420N
GB/T 1591 Q420MD
Tensile Strength
520-680 MPa
520-680 MPa
Yield Strength
>=420 MPa
>=420 MPa
Elongation
>=19%
>=19%
Condition
Normalized or normalized rolled (N), nominal thickness up to 16 mm (tensile strength up to 100 mm), Table 4
Thermomechanical processed (TMCP), nominal thickness or diameter up to 16 mm (tensile strength: up to 40 mm)
Typical Applications
EN 10025-3 S420N
Not documented
GB/T 1591 Q420MD
General structure for engineering (plates, strips, bars and sections)
Can EN 10025-3 S420N Be Substituted With GB/T 1591 Q420MD?
EN 10025-3 S420N and GB/T 1591 Q420MD overlap closely enough on chemistry and mechanical properties that GB/T 1591 Q420MD is often considered as a substitute for EN 10025-3 S420N in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
What is the difference between EN 10025-3 S420N and GB/T 1591 Q420MD?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can EN 10025-3 S420N be substituted with GB/T 1591 Q420MD?
EN 10025-3 S420N and GB/T 1591 Q420MD overlap closely enough on chemistry and mechanical properties that GB/T 1591 Q420MD is often considered as a substitute for EN 10025-3 S420N in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.