SGC440+Z galvanized coil is equivalent to?
|
Standards |
Approximate equivalent grades |
Key differences |
|
Chinese national standard |
DX54D+Z(GB/T 2518) |
Tensile strength is similar, but the national standard focuses on formability rather than strength |
|
European standard (EN) |
S350GD+Z(EN 10346) |
European standard is marked with yield strength (≥350MPa), and the actual performance is better |
|
American standard (ASTM) |
ASTM A653 SS Grade 40 |
Tensile strength is similar, but the American standard test method is different |
|
German standard (DIN) |
StE350+Z (Old brand) |
Specific mechanical performance parameters need to be checked |
Strength marking difference:
Japanese standard SGC440 is named after tensile strength (440MPa), while European standard (such as S350GD) is named after yield strength. The actual tensile strength of S350GD may be higher (about 450-550MPa).
Coating selection:
Japanese standard coating is usually thinner (mainly Z60), while European standard more commonly uses Z80-Z120.
What is the material grade of SGC440 steel?
Standard:
Japanese Industrial Standard JIS G 3302 (hot-dip galvanized steel sheet and strip)
Grade breakdown:
SGC: Hot-dip galvanized steel sheet (Steel Galvanized Commercial)
440: Minimum tensile strength 440 MPa (Note: Japanese standard is named after tensile strength, not yield strength)
Suffix: Usually +Z (pure zinc coating) or +ZF (zinc-iron alloy coating)
It belongs to medium-high strength galvanized steel, between ordinary commercial grade (such as SGCC) and high-strength structural grade (such as SGHC)
Conventional coating: Z60 (60g/m²) is suitable for general environment.
Thick coating: Z120 (120g/m²) is used in high corrosion environment (such as coastal areas)
What is the difference between SGC440, SGCC and SGHC?
|
Comparison items |
SGC440 |
SGCC (general commercial grade) |
SGHC (high strength grade) |
|
Tensile strength |
≥440 MPa |
270-410 MPa |
≥490 MPa |
|
Yield strength |
≈300-350 MPa (actual measurement) |
No specific requirements |
≥350 MPa |
|
Price positioning |
Mid- to high-end |
Economical |
High-end |
|
Applicable scenarios |
Structural reinforcement |
Non-load-bearing shell |
Heavy load-bearing structure |
SGC440+Z galvanized steel coil is used for?
Automobile manufacturing (common in Japanese models)
✅ Door anti-collision beam: taking into account both lightweight and collision safety
✅ Truck compartment frame: medium load structural support
Features: higher strength than ordinary galvanized steel (such as SGCC), but lower cost than ultra-high strength steel (such as SGHC)
Architecture and structural engineering
✅ Light steel structure: roof truss, wall support (for Asian market)
✅ Photovoltaic bracket: weather resistance meets long-term outdoor use
Coating recommendation: choose Z80 (80g/m²) or above coating for outdoor environment, and Z120 is recommended for coastal areas.
Home appliances and electrical equipment
✅ Washing machine inner drum structure: anti-deformation and resistant to humid environment
✅ Air conditioner outdoor unit bracket: balance of strength and corrosion resistance
Surface treatment: Smooth surface is more suitable for spraying exterior parts.
