S550GD+Z armored galvanized steel strip equivalent to?
|
Standard system |
Equivalent/Similar Grades |
Key differences |
|
China (GB) |
S550GD+Z (GB/T 2518) |
Directly correspond, consistent technical parameters |
|
Europe (EN) |
S550GD+Z (EN 10346) |
Same standard system, same naming |
|
USA (ASTM) |
SS550 (ASTM A653) |
Similar strength, but different coating standards (American standard uses "G" to represent coating weight, such as G90) |
|
Japan (JIS) |
SGHC550 (JIS G 3321) |
Same tensile strength (≥550MPa), but yield strength may be slightly lower |
|
International (ISO) |
HD550D+Z (ISO 4997) |
Need to confirm coating weight matching |
What is the material of S550GD+Z armored galvanized steel strip?
S550GD+ZS550GD+Z Galvanized Steel Tape for Armoring is a high-strength structural hot-dip galvanized steel tape that combines ultra-high strength and excellent corrosion resistance.
S: Structural Steel
550: Minimum yield strength 550MPa (actual 550-700MPa)
GD: Galvanized by Hot-Dip
+Z: Chromate Passivation
What is the difference between S550GD+Z and S350GD+Z?
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Features |
S550GD+Z |
S350GD+Z |
|
Strength |
Ultra-high (yield ≥ 550 MPa) |
Medium to high (yield ≥ 350 MPa) |
|
Compression resistance |
Can withstand extreme loads and impacts |
Suitable for general mechanical protection |
|
Coating requirements |
Requires thick coating (Z180+) |
Conventional coating (Z60~Z100) |
|
Cost |
High (complex materials + process) |
Economical choice |
Which is stronger, stainless steel or S550GD+Z galvanized steel?
Strength performance comparison
|
Indicators |
S550GD+Z galvanized steel |
Stainless steel (typical grades) |
|
Yield strength |
≥550 MPa (ultra-high strength) |
200-1000 MPa (varies greatly depending on the grade) |
|
Tensile strength |
550-700 MPa |
500-2000 MPa |
|
Hardness |
180-220 HV |
150-300 HV (austenite) |
Corrosion resistance comparison
|
Environment |
S550GD+Z (Z275 coating) |
Stainless steel (304 for example) |
|
General atmospheric environment |
10-20 years (passivation layer protection) |
More than 50 years (self-passivation) |
|
Marine environment |
5-8 years (regular maintenance required) |
More than 30 years |
|
Acidic/chemical environment |
Not applicable (zinc layer corrodes quickly) |
Excellent (resistant to pH 2-11 media) |
so：
Ordinary stainless steel (such as 304): lower strength than S550GD+Z (304 yield is only 205MPa)
High-strength stainless steel (such as 17-4PH): far superior to S550GD+Z (yield ≥ 1100MPa)
Mainstream structural stainless steel (such as 316/430): equivalent to or slightly lower in strength than S550GD+Z
Stainless steel has better corrosion resistance than galvanized steel, but the cost is higher