galvanized steel sheet
Looking for guidance on choosing between S550GD and other structural steel grades? You've come to the right place. As a direct factory with 20 years of structural steel experience, GNEE Steel provides professional comparisons for S550GD galvanized steel sheet selection. In this guide, we'll compare S550GD with common grades and help you make informed decisions.
Galvanized structural steel sheets are categorized by strength levels. Low-strength grades (DX51D) suit non-load-bearing parts, medium-strength (S350GD) for general structures, and high-strength (S550GD) for heavy-load applications. Each grade has unique specifications to match different project needs.
Galvanized steel sheet
S550GD vs S350GD: Strength and Performance Comparison
S550GD and S350GD are both structural galvanized grades, but differ in strength:
| Specification | S550GD Galvanized Steel Sheet | S350GD Galvanized Steel Sheet | Key Difference |
|---|---|---|---|
| Yield Strength | ≥550 MPa | ≥350 MPa | S550GD offers 57% higher yield strength |
| Tensile Strength | 600-730 MPa | 420-560 MPa | 38-39% higher tensile strength for S550GD |
| Elongation (A80mm) | ≥14% | ≥18% | S350GD has better ductility |
| Chemical Composition | Higher Mn (1.60% max) | Lower Mn (1.50% max) | Mn content contributes to S550GD's strength |
| Weight Savings | 20-30% thinner material for same load | Thicker material required | S550GD reduces material weight and cost |
| Best Applications | Heavy-load structures, bridges, large equipment | Residential roofing, light frames, small appliances | S550GD for high-stress environments |
S550GD vs DX51D: Application Suitability Comparison
DX51D is a common commercial grade, while S550GD is high-strength structural grade:
- Strength Level:
S550GD: ≥550MPa yield strength (structural use)
DX51D: ≥280MPa yield strength (non-structural use)
- Fabrication:
S550GD: Good formability for bending (180°) but requires more precise processing
DX51D: Excellent formability for complex shapes and deep drawing
- Cost-Efficiency:
S550GD: Higher upfront cost but lower total cost via material reduction
DX51D: Lower upfront cost but higher material usage for load-bearing needs
- Service Life:
S550GD: 20-30 years in outdoor use (with proper coating)
DX51D: 10-15 years in outdoor use (same coating thickness)
Dimensional Compatibility of S550GD with Other Grades
S550GD galvanized steel sheet maintains dimensional consistency with other grades:
| Dimensional Parameter | S550GD | S350GD | DX51D | Compatibility Note |
|---|---|---|---|---|
| Thickness Range | 0.8-6.0mm | 0.8-6.0mm | 0.3-3.0mm | S550GD matches S350GD's range; thicker than DX51D |
| Width Range | 900-1800mm | 900-1800mm | 900-1800mm | All grades share same width options |
| Length Range | 2000-12000mm | 2000-12000mm | 2000-12000mm | Consistent length options across grades |
| Coating Weight | 60-275g/m² | 60-275g/m² | 60-275g/m² | Same coating options for all galvanized grades |
How to Select Between S550GD and Other Grades
Follow these steps to choose the right grade:
- Assess Load Requirements:
Heavy loads (>20kN/m²): Choose S550GD galvanized steel sheet
Medium loads (10-20kN/m²): Select S350GD
Light loads (<10kN/m²): Opt for DX51D
- Consider Environmental Conditions:
Harsh environments (coastal, industrial): S550GD with heavy coating
Mild environments: Any grade with appropriate coating
- Evaluate Fabrication Needs:
Complex bending/forming: DX51D or S350GD
Simple fabrication: S550GD (better strength-to-weight ratio)
- Calculate Total Cost:
Long-term projects: S550GD (lower maintenance, longer life)
Short-term projects: DX51D (lower upfront cost)
S550GD galvanized steel sheet outperforms other grades in high-strength applications, offering better weight savings and durability. Contact GNEE Steel today to get personalized grade selection advice and a free project cost analysis!
|
Standard |
Grade |
C |
Si |
Mn |
P |
S |
Ti |
|
Forcold Forming Chinese Standard |
DX51D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
DX52D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX53D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX54D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX56D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX57D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
Forcold Forming Japanese Standard |
SGCC |
0.15 |
0.50 |
0.80 |
0.050 |
0.030 |
0.025 |
|
SGCD1 |
0.12 |
0.50 |
0.60 |
0.040 |
0.030 |
0.025 |
|
|
SGCD3 |
0.08 |
0.50 |
0.45 |
0.030 |
0.030 |
0.025 |
|
|
SGCD4 |
0.06 |
0.50 |
0.45 |
0.030 |
0.030 |
0.025 |
|
|
For Structure Japanese Standard |
SGC340 |
0.25 |
0.50 |
1.70 |
0.200 |
0.035 |
0.025 |
|
SGC400 |
0.25 |
0.50 |
1.70 |
0.200 |
0.035 |
0.150 |
|
|
SGC490 |
0.30 |
0.50 |
2.00 |
0.200 |
0.035 |
0.025 |
|
|
SGC510 |
0.30 |
0.50 |
2.50 |
0.200 |
0.035 |
0.025 |
|
|
For Structure AISI Standard |
S220GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
S250GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
|
S280GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
|
S320GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
|
S350GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.150 |
|
|
S550GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.150 |
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