Q355 Chemical Composition Table
|
Element |
Q355B (≤%) |
Q355C (≤%) |
Q355D (≤%) |
|
C (Carbon) |
≤0.24 |
≤0.20 |
≤0.18 |
|
Si (Silicon) |
≤0.55 |
≤0.55 |
≤0.55 |
|
Mn (Manganese) |
≤1.60 |
≤1.60 |
≤1.60 |
|
P (Phosphorus) |
≤0.035 |
≤0.030 |
≤0.025 |
|
S (Sulfur) |
≤0.035 |
≤0.030 |
≤0.020 |
|
Cr (Chromium) |
≤0.30 |
≤0.30 |
≤0.30 |
|
Ni (Nickel) |
≤0.30 |
≤0.30 |
≤0.30 |
|
Cu (Copper) |
≤0.40 |
≤0.40 |
≤0.40 |
|
N (Nitrogen) |
≤0.012 |
≤0.012 |
- |
|
Al (Aluminum) |
- |
≥0.015 |
≥0.015 |
Technical Specifications
|
Parameter |
Specification |
|
Standard |
GB/T 1591 (Q355B) |
|
Thickness |
0.3mm – 6.0mm (customizable) |
|
Width |
600mm – 1500mm |
|
Surface Finish |
Regular spangle |
Applications of Q355 Galvanized Carbon Steel Coil
|
Application Area |
Specific Use of Q355 Galvanized Carbon Steel Coil |
|
Roofing Systems |
Roof sheets, withstand environmental elements and loads; roof trusses and frames, provide lightweight yet sturdy support |
|
Wall Cladding |
Exterior wall panels, offer aesthetic appeal and weatherproofing; internal partition walls, for customized sections with load-bearing ability |
|
Structural Frames |
Steel frame buildings, fabricate load-bearing columns, beams and braces; canopies and awning frames, withstand wind and other forces |
|
Fencing and Railings |
Perimeter fencing, robust and durable for security; stair railings and balconies, ensure safety with an attractive appearance |
Advantages
|
Advantage |
Description |
|
High Strength |
Higher yield/tensile strength than Q235, suitable for load-bearing structures. |
|
Corrosion Resistance |
Zinc coating prevents rust, ideal for humid/salty environments. |
|
Cost-Effective |
Long lifespan, low maintenance, reduces replacement costs. |
|
Formability & Weldability |
Easy to bend, stamp, and weld for fabrication. |
|
Lightweight |
High strength-to-weight ratio, saves material and transport costs. |
|
Aesthetic Appeal |
Smooth, shiny surface; can be painted for decorative uses. |
|
Wide Applications |
Used in construction (roofing, panels), automotive, agriculture, etc. |
|
Weather Resistance |
Performs well in extreme temperatures and harsh conditions. |
Standards
|
Country/Standard |
Corresponding Grade |
Yield Strength (MPa) |
|
China (GB/T 1591) |
Q355B/C/D/E |
≥355 |
|
Europe (EN 10025) |
S355JR/J0/J2/K2 |
≥355 |
|
United States (ASTM A572) |
Grade 50 |
≥345 |
|
Japan (JIS G3106) |
SM490A/B |
325-355 |
|
International (ISO 630) |
E355 |
≥355 |
Packaging of Q355 Steel Coil
FAQ
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