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EN 10028-3 P420NL1 vs GB/T 1591 Q420NB

Related Material — 65% match based on chemical composition and mechanical property overlap.

EN 10028-3 P420NL1 (EN 10028-3:2017) and GB/T 1591 Q420NB (GB/T 1591:2018) are both steel grades. EN 10028-3 P420NL1 is classified under Alloy Steel, while GB/T 1591 Q420NB is classified under Structural Steel — a different category, which is worth noting alongside the chemistry match below. EN 10028-3 P420NL1 is typically used for flat products for pressure equipment, while GB/T 1591 Q420NB is commonly used for general structure for engineering (plates, strips, bars and sections). EN 10028-3 P420NL1 is defined under European Standard (EN), originating from Europe, while GB/T 1591 Q420NB is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, EN 10028-3 P420NL1 vs GB/T 1591 Q420NB is a 90.3% match. As per mechanical properties, the match is 94.1%. Combined, this makes them a related material overall at 65%.

Frequently Compared With EN 10028-3 P420NL1:
IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 EN 10028-2 10CrMo9-10 IS 1570 (Part 4) 10Mo6
Match Breakdown
CHEMISTRY MATCH
90.3%
MECHANICAL MATCH
94.1%
OVERALL
65%
Specifications
Property EN 10028-3 P420NL1 GB/T 1591 Q420NB
Standard EN 10028-3:2017 GB/T 1591:2018
Category Alloy Steel Structural Steel
C (%) <=0.20 <=0.20
Si (%) <=0.60 <=0.60
Mn (%) 1.10-1.70 1.00-1.70
P (%) <=0.025 <=0.035
S (%) <=0.008 <=0.035
Al (%) >=0.020 >=0.015
N (%) <=0.020 <=0.015
Cr (%) <=0.30 <=0.30
Cu (%) <=0.30 <=0.40
Mo (%) <=0.10 <=0.10
Nb (%) <=0.05 0.01-0.05
Ni (%) <=0.80 <=0.80
Ti (%) <=0.03 0.006-0.05
V (%) <=0.20 0.01-0.20
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property EN 10028-3 P420NL1 GB/T 1591 Q420NB
Tensile Strength 540-690 MPa 520-680 MPa
Yield Strength >=420 MPa >=420 MPa
Elongation >=19% >=19%
Condition Normalized, nominal thickness up to 16 mm Normalized or normalizing rolled, nominal thickness or diameter up to 16 mm (tensile strength: up to 100 mm)
Typical Applications
EN 10028-3 P420NL1
Flat products for pressure equipment
GB/T 1591 Q420NB
General structure for engineering (plates, strips, bars and sections)
Key Differences
Can EN 10028-3 P420NL1 Be Substituted With GB/T 1591 Q420NB?
EN 10028-3 P420NL1 and GB/T 1591 Q420NB share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
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EN 10028-3 P420NL1
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GB/T 1591 Q420NB
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Frequently Asked Questions
What is the difference between EN 10028-3 P420NL1 and GB/T 1591 Q420NB?
Different category: EN 10028-3 P420NL1 is Alloy Steel, GB/T 1591 Q420NB is Structural Steel.
Can EN 10028-3 P420NL1 be substituted with GB/T 1591 Q420NB?
EN 10028-3 P420NL1 and GB/T 1591 Q420NB share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.