Q355B (GB/T 1591-2018) is a structural steel grade in China, known for its high strength and good mechanical properties.
International Equivalents
United States:
ASTM A572 Grade 50 is the closest equivalent to Q355B in the United States, offering similar high-strength properties suitable for structural applications.
Europe:
EN 10025-2 S355J2-steel_4448.html target=_blank class=infotextkey>S355JR or S355J2 are European equivalents to Q355B, known for their excellent weldability and structural strength.
Japan:
JIS G3106 SM490 has similarities to Q355B in Japan, providing good strength and weldability for structural components.
India:
IS 2062 E350 or IS 8500 FE 570 are Indian standards that can be considered as equivalents to Q355B, commonly used in structural applications in India.
Other Equivalent Grades
Australia/New Zealand:
AS/NZS 3678 Grade 350 is an equivalent to Q355B, meeting structural steel requirements in Australia and New Zealand.
Additional Notes:
When selecting an equivalent material for Q355B, it is essential to consider specific requirements such as mechanical properties, chemical composition, and intended application to ensure compatibility and compliance with relevant standards and specifications.
Q355B
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Main chemical elements composition of Q355B |
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|
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Cu |
N |
|
0.24 |
0.55 |
1.60 |
0.035 |
0.035 |
0.30 |
0.30 |
0.40 |
0.012 |
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Mechanical Property for Q355B steel plate |
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Thickness (mm) |
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Yield strength (≥Mpa) |
T≤16 |
16<T≤40 |
40<T≤63 |
63<T≤80 |
80<T≤100 |
100<T≤150 |
150<T≤200 |
200<T |
|
355 |
345 |
335 |
325 |
315 |
295 |
285 |
275 |
|
|
Tensile strength (Mpa) |
T≤100 |
100<T≤150 |
150<T≤250 |
250<T≤4000 |
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470-630 |
450-600 |
450-600 |
- |
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FAQ
Q: What is material grade Q355B?
A: The Q355B equivalent ASTM material
ASTM A572 Grade 50 is a structural steel with high strength and low alloy content that is widely utilized in structural applications. Both Q355B and ASTM A572 Grade 50 have a minimum yield strength of 355 MPa (50 ksi) and possess similar mechanical properties.
Q: What is the difference between Q345 and Q355B?
A: Q345B and Q355B are two different steels, and their main differences are as follows: Different properties: Q345 is a low-alloy steel, while Q355 is a low-alloy, high-strength structural steel widely used in bridges, vehicles, ships, buildings, pressure vessels, special equipment, and other fields.
Q: What is the difference between A36 and Q355B?
A: A36 and Q355B are both structural steel grades, but A36 is an older American standard (ASTM A36) while Q355B is a newer Chinese standard. Q355B generally offers higher strength and potentially better performance in some applications, particularly where higher yield strength is needed.
Q: What is the Indian standard equivalent of Q355B?
A: India: IS 2062 E350 or IS 8500 FE 570 are Indian standards that can be considered as equivalents to Q355B, commonly used in structural applications in India.
Q: What is the European equivalent of Q355B steel?
A: S355JR steels from European British steel standard BS EN10025-2 low alloy high strength steels. These two steel materials Q355B and S355JR are totally equivalent in chemical composition and mechincal properties from the following comparasion data table.
Q: What is the difference between Q355B and Q235B?
A: Different chemical compositions: Q235B has carbon (C) ≤ 0.22%, manganese (Mn) ≤ 1.4%, silicon (Si) ≤ 0.35%, phosphorus (P) ≤ 0.045%, and sulfur (S) ≤ 0.045%, while Q355B has carbon (C) ≤ 0.20%, manganese (Mn) ≤ 1.70%, silicon (Si) ≤ 0.50%, phosphorus (P) ≤ 0.030%, and sulfur (S) ≤ 0.030%.
Q: What is Q355B equivalent to JIS material?
A: Q355 Equivalent Materials
Q355 can be replaced with equivalent materials, including A572 Grade 50 USA ASTM, Q355 China GB/T, and SPFC 590 Vietnam/Japanese JIS.
| Other steel plate | ||||
| Name | Material | Specification (mm) | Tons | Remark |
| Low Alloy | Q345A, Q345B, Q345C, Q345D, Q345E, Q390, Q420, Q460C, ST52-3, S355J2+N, SS400, SA302GrC, S275NL, 35CrMo | 6 - 350 | 5788.56 | Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection |
| Pressure Vessel Plate | Q245R, Q345R, Q370R, 16MnDR, 09MnNiDR, 15CrMoR, 14Cr1MoR, 12Cr2Mo1R, SA516Gr60, SA516Gr70, SA516Gr485, SA285, SA387Gr11, SA387Gr12, SA387Gr22, P265,P295,P355GH,Q245R(R-HIC),Q345R(R-HIC) | 3 - 300 | 8650 | Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection |
| High-Strength Plate | WH785D/E,Q960D/E, Q890D/E,WH60D/E,WH70B,Q550D,Q590D,Q690D/E | 8 - 120 | 3086.352 | Quenched and tempered |
| Wear-Resistant Plate | NM360, NM400, NM450, NM500 | 6 - 150 | 3866.297 | Quenched and tempered |
| Bridge Plate | Q235qC, Q345qC, Q370qC, Q420qC, Q345qDNH, Q370qDNH, A709 - 50F - 2, A709 - 50T - 2 | 8 - 200 | 2853.621 | Hot rolling, normalized ,hot rolling controlled rolling, quenched and tempered + toughness and brittleness |
