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EN 10028-3 P420NH vs GB/T 1591 Q420B

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

EN 10028-3 P420NH (EN 10028-3:2017) and GB/T 1591 Q420B (GB/T 1591:2018) are both steel grades. EN 10028-3 P420NH 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 P420NH 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 P420NH 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 P420NH vs GB/T 1591 Q420B is a 80.1% 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 P420NH:
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
80.1%
MECHANICAL MATCH
60.8%
OVERALL
65%
Specifications
Property EN 10028-3 P420NH 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 (%) <=0.010 <=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 P420NH 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 P420NH
Flat products for pressure equipment
GB/T 1591 Q420B
General structure for engineering (plates, strips, bars and sections)
Key Differences
Can EN 10028-3 P420NH Be Substituted With GB/T 1591 Q420B?
EN 10028-3 P420NH 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.
On M-EX Right Now
EN 10028-3 P420NH
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GB/T 1591 Q420B
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Frequently Asked Questions
What is the difference between EN 10028-3 P420NH and GB/T 1591 Q420B?
Different category: EN 10028-3 P420NH is Alloy Steel, GB/T 1591 Q420B is Structural Steel. EN 10028-3 P420NH specifies Al which is not specified for GB/T 1591 Q420B.
Can EN 10028-3 P420NH be substituted with GB/T 1591 Q420B?
EN 10028-3 P420NH 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.