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EN 10028-3 P420NL1 vs GB/T 1591 Q420B

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

EN 10028-3 P420NL1 (EN 10028-3:2017) and GB/T 1591 Q420B (GB/T 1591:2018) are both steel grades. EN 10028-3 P420NL1 is classified under Alloy Steel, while GB/T 1591 Q420B 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 Q420B 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 Q420B is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, EN 10028-3 P420NL1 vs GB/T 1591 Q420B is a 79.9% match. As per mechanical properties, the match is 60.8%. 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 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 EN 10028-2 10CrMo9-10 IS 1570 (Part 7) 10Mo6H UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
79.9%
MECHANICAL MATCH
60.8%
OVERALL
65%
Specifications
Property EN 10028-3 P420NL1 GB/T 1591 Q420B
Standard EN 10028-3:2017 GB/T 1591:2018
Category Alloy Steel Structural Steel
C (%) <=0.20 <=0.20
Si (%) <=0.60 <=0.55
Mn (%) 1.10-1.70 <=1.70
P (%) <=0.025 <=0.035
S (%) <=0.008 <=0.035
Al (%) >=0.020 Not specified
N (%) <=0.020 <=0.015
Cr (%) <=0.30 <=0.30
Cu (%) <=0.30 <=0.40
Mo (%) <=0.10 <=0.20
Nb (%) <=0.05 <=0.05
Ni (%) <=0.80 <=0.80
Ti (%) <=0.03 <=0.05
V (%) <=0.20 <=0.13
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 Q420B
Tensile Strength 540-690 MPa 520-680 MPa
Yield Strength >=420 MPa >=420 MPa
Elongation >=19% >=20%
Condition Normalized, nominal thickness up to 16 mm 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
Typical Applications
EN 10028-3 P420NL1
Flat products for pressure equipment
GB/T 1591 Q420B
General structure for engineering (plates, strips, bars and sections)
Key Differences
Can EN 10028-3 P420NL1 Be Substituted With GB/T 1591 Q420B?
EN 10028-3 P420NL1 and GB/T 1591 Q420B 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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Frequently Asked Questions
What is the difference between EN 10028-3 P420NL1 and GB/T 1591 Q420B?
Different category: EN 10028-3 P420NL1 is Alloy Steel, GB/T 1591 Q420B is Structural Steel. EN 10028-3 P420NL1 specifies Al which is not specified for GB/T 1591 Q420B.
Can EN 10028-3 P420NL1 be substituted with GB/T 1591 Q420B?
EN 10028-3 P420NL1 and GB/T 1591 Q420B 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.