SGCC Steel Grades

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    SGCC Steel Technical Specifications & Applications

    SGCC (Steel Galvanized Cold Commercial) is a hot-dip galvanized steel grade under the Japanese Industrial Standard JIS G3302. It is designed for applications requiring moderate strength, excellent corrosion resistance, and good formability. SGCC features a thick zinc coating that provides long-lasting protection against rust and oxidation, making it ideal for outdoor and industrial use.

    SGCC steel offers reliable formability, enabling efficient bending, cutting, and shaping for structural beams, columns, automotive panels, and heavy-duty supports. Its enhanced corrosion resistance ensures durability across various applications.

    Common applications of SGCC include roofing sheets, structural components, fencing, automotive body panels and chassis parts, as well as appliance casings and internal components. Its combination of strength, corrosion protection, and versatility makes it a preferred choice for construction, automotive, and manufacturing industries.

    Table of Contents

    1. Typical Uses & Selection Guidance

    • SGCC Overview SGCC (Hot-Dip Galvanized Cold Steel) is a corrosion-resistant cold-rolled steel grade designed for applications requiring moderate strength and good formability. It provides reliable mechanical properties for construction, manufacturing, and general industrial use.

    • Corrosion Protection SGCC features a uniform zinc coating that protects against rust and oxidation in outdoor or industrial environments. The coating ensures a smooth surface suitable for painting, coating, or further processing.

    • Forming Advantages SGCC offers good elongation, formability, and bendability. It enables efficient cutting, bending, and shaping for roofing sheets, structural components, automotive panels, and appliance parts. Strict production standards ensure consistent mechanical properties and reliable performance.

    2. Technical Specifications Table

    1. Chemical Composition Requirements (Maximum %)

    Steel GradeCarbon (C)Silicon (Si)Manganese (Mn)Phosphorus (P)Sulfur (S)Titanium (Ti)
    SGCC≤ 0.18%≤ 0.03%≤ 1.00%≤ 0.03%≤ 0.03%Not specified

    2. Mechanical Property Requirements (Maximum Values)

    Steel GradeMin. Yield Strength (MPa)Min. Tensile Strength (MPa)Min. Elongation (%) Lo=80 mmBend Angle (°)Mandrel Diameter (× Thickness t)
    SGCC180260–350≥28%180°2t

    3. Mechanical Property Requirements (Maximum Values)

    Coating ClassMandrel Diameter (× Thickness t)
    Z100, Z2001t
    Z275, Z350, Z450, AZ150, AZ200, AM100, AM125, AM150, AM175, AM200, AM2252t
    Z6003t

    4. Applicable Hot-Dip Metallic Coating Types

    Coating ClassComposition (%)Key Features
    Z (Zinc)≥99% ZincBasic corrosion protection; suitable for general use.
    ZA (Zinc-Aluminium)95% Zn, 5% AlImproved corrosion resistance over pure zinc.
    ZF (Zinc-Iron)Zinc with iron alloyEnhanced hardness and wear resistance.
    ZM (Zinc-Magnesium)Zn with 2–4% Mg, 5–13% AlSuperior corrosion resistance in harsh environments.
    AZ (Aluminium-Zinc)55% Al, 43.5% Zn, 1.5% SiExcellent corrosion resistance and heat reflectivity.
    AM (Aluminium-Magnesium)Al with Mg alloyHigh corrosion resistance; suitable for high-temperature applications.

    3. SGCC vs SPCC Steel — What’s the Difference?

    Property SGCC Steel Grade SPCC Steel Grade
    Yield Strength 120–220 MPa 100–180 MPa
    Tensile Strength 240–360 MPa 200–280 MPa
    Elongation (80 mm) ≥32% ≥35%
    Bendability 180° with 6t mandrel 180° with 6t mandrel

    SGCC Steel FAQ：

    SGCC (Hot-Dip Galvanized Commercial Cold-Rolled Steel) is a corrosion-resistant steel grade under JIS G3302, widely used in construction, automotive, and appliance industries. It features a uniform zinc coating for excellent durability in industrial and outdoor environments.

    • Yield Strength: ≥205 MPa

    • Tensile Strength: 270–500 MPa

    • Elongation: ≥24%

    These properties ensure moderate strength and high formability, suitable for a range of manufacturing and structural applications.

    • SGCC: Hot-dip galvanized for thicker, more durable zinc coating; ideal for outdoor and industrial use.

    • SECC: Electro-galvanized with thinner coating; best for indoor or light-duty applications.

    SGCC provides superior corrosion resistance compared to SECC.

    • Construction: Roofing sheets, wall panels, structural components.

    • Automotive: Body panels, chassis parts, structural reinforcements.

    • Appliances: Casings for refrigerators, washing machines, and other household appliances.

    • Electrical: Enclosures for electrical distribution and control panels.

    Its combination of strength, corrosion resistance, and formability makes it versatile across industries.

    • Storage: Keep in a dry, ventilated area to prevent moisture exposure.

    • Handling: Avoid contact with acids or alkalis that can damage the zinc coating.

    • Maintenance: Inspect regularly for corrosion and address issues promptly to maintain protective properties.

    G450 steel production to application

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