SGCC is a hot-dip galvanized steel in the Japanese Industrial Standard JIS G3302, which is widely used in home appliances, construction and general industrial fields.
The surface of SGCC galvanized steel has zinc flowers (the size can be controlled). The zinc layer is made by hot-dip galvanizing. The steel plate is immersed in molten zinc liquid (about 450°C) to form a zinc-iron alloy layer. The zinc layer will be thicker and more corrosion-resistant than electroplating galvanizing, and the cost is also lower.
SGCC hot-dip galvanized steel basic performance indicators
|
Performance parameters |
SGCC standard value |
Typical requirements for the home appliance industry |
|
Tensile strength (MPa) |
270~500 |
300~400 (applicable to structural parts) |
|
Yield strength (MPa) |
≥140 |
≥180 (high-demand parts) |
|
Elongation (%) |
≥18 (gauge length 50mm) |
≥22 (deep-drawing optimization) |
|
Hardness (HV) |
60~120 |
70~100 (balanced formability) |
|
Zinc layer weight (g/m²) |
Double-sided 40~180 |
60~120 (mainstream home appliances) |
Advantages of SGCC galvanized steel in home appliance applications：
Zinc-iron alloy layer: The alloy layer (Γ/δ phase) formed by high-temperature process has stronger corrosion resistance
Long-term protection: Longer service life in humid environment (such as washing machine, water heater), reducing after-sales maintenance
Low material cost: About 15-30% cheaper than electroplating zinc (EG), suitable for large-scale production
Excellent process cost: Plating is completed in a single process, without the complex pre-treatment of electroplating
Low maintenance cost: Reduce the need for secondary treatment such as anti-corrosion coating
Good processing adaptability: Can be well combined with post-processing processes such as spraying and laminating
Our company's SGCC hot-dip galvanized steel host surface zinc flower can be customized:
|
Zinc flower type |
Surface characteristics |
Processing |
Typical home appliance applications |
Notes |
|
No zinc flower |
Mirror smooth (Ra≤0.6μm) |
Skin-pass |
High-end refrigerator door panels, oven front panels, touch panels |
High cost, anti-scratch packaging is required |
|
Small zinc flower |
Dense grains (0.3-1mm) |
Water spray/steam forced cooling |
Air conditioner housings, washing machine side panels, microwave oven external components |
Cooling rate needs to be controlled (15-25℃/s) |
|
Regular zinc flower |
Visible hexagonal grains (1-3mm) |
Natural cooling |
Refrigerator back panels, washing machine inner drum brackets, electrical hidden structural parts |
Not suitable for parts with high appearance requirements |
|
Large zinc flower |
Obvious grains (3-10mm) |
Slow natural cooling |
Water heater liner, outdoor electrical box, high humidity environment components |
Surface is rough, avoid direct exposure |
Our Services
GNEE provides value-added services for galvanized steel, including polishing, annealing, heat treatment and welding.
Processing services: bending, welding, uncoiling, punching, cutting, forming, or customized according to customer requirements.
Packaging services:
