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GB/T 1591 Q420C vs EN 10025-3 S420N

Close Alternative — 78.6% match based on chemical composition and mechanical property overlap.

GB/T 1591 Q420C (GB/T 1591:2018) and EN 10025-3 S420N (EN 10025-3:2019) are both steel grades. Both fall under the Structural Steel category. GB/T 1591 Q420C is defined under Guobiao Standards (GB/T), originating from China, while EN 10025-3 S420N is defined under European Standard (EN), originating from Europe.

As per chemical composition, GB/T 1591 Q420C vs EN 10025-3 S420N is a 84.6% match. As per mechanical properties, the match is 66.7%. Combined, this makes them a close alternative overall at 78.6%.

Other Structural Steel Grades to Compare With GB/T 1591 Q420C:
GOST 19281 09G2S CSA G40.21 260W AS/NZS 3679.1 300 CSA G40.21 300W AS/NZS 3679.1 350 CSA G40.21 350W CSA G40.21 400A CSA G40.21 400W CSA G40.21 480W ASTM A1008 SS Grade 50 ASTM A1008 SS Grade 80 ASTM A283C
Match Breakdown
CHEMISTRY MATCH
84.6%
MECHANICAL MATCH
66.7%
OVERALL
78.6%
Specifications
Property GB/T 1591 Q420C EN 10025-3 S420N
Standard GB/T 1591:2018 EN 10025-3:2019
Category Structural Steel Structural Steel
C (%) <=0.20 <=0.20
Si (%) <=0.55 <=0.60
Mn (%) <=1.70 1.00-1.70
P (%) <=0.030 <=0.030
S (%) <=0.030 <=0.025
Nb (%) <=0.05 <=0.05
V (%) <=0.13 <=0.20
Ti (%) <=0.05 <=0.05
Cr (%) <=0.30 <=0.30
Ni (%) <=0.80 <=0.80
Cu (%) <=0.40 <=0.55
Mo (%) <=0.20 <=0.10
N (%) <=0.015 <=0.025
Al (%) Not specified >=0.02
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property GB/T 1591 Q420C EN 10025-3 S420N
Tensile Strength 520-680 MPa 520-680 MPa
Yield Strength >=420 MPa >=420 MPa
Elongation >=20% >=19%
Condition Hot-rolled (as-rolled), nominal thickness or diameter up to 16 mm for yield; tensile strength for up to 100 mm; elongation longitudinal, up to 40 mm Normalized or normalized rolled (N), nominal thickness up to 16 mm (tensile strength up to 100 mm), Table 4
Typical Applications
GB/T 1591 Q420C
General structure for engineering (plates, strips, bars and sections)
EN 10025-3 S420N
Not documented
Key Differences
Can GB/T 1591 Q420C Be Substituted With EN 10025-3 S420N?
GB/T 1591 Q420C and EN 10025-3 S420N are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
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GB/T 1591 Q420C
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EN 10025-3 S420N
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Frequently Asked Questions
What is the difference between GB/T 1591 Q420C and EN 10025-3 S420N?
EN 10025-3 S420N specifies Al which is not specified for GB/T 1591 Q420C.
Can GB/T 1591 Q420C be substituted with EN 10025-3 S420N?
GB/T 1591 Q420C and EN 10025-3 S420N are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.