120g/m² Zinc Coated Steel

-- Steady & Reliable Manufacturer --

Introduction

Our 120g/m² Zinc Coated Steel (Z120 or G40 coating mass) provides a reliable standard level of galvanization suitable for general interior or moderately protected exterior applications. This mass specification refers to the total weight of zinc applied to both sides of the sheet (60g/m² per side nominal), offering a balance between effective corrosion resistance and material cost.

This material is often the baseline requirement for many national building codes for internal structural components and secondary exterior parts that are not subject to direct, constant weathering.

Specifications

Parameter	Value/Range
Coating Mass	120 g/m簡 (Z120 or G40 equivalent)
Base Material	Cold Rolled Steel (CR)
Product Form	Coils (GI), Sheets, or Slit Strips
Surface Finish	Regular Spangle, Minimum Spangle
Thickness Range	0.3mm to 2.0mm
Surface Treatment	Chromated and Oiled (Standard) or Anti-Fingerprint (Optional)
ASTM Standard	ASTM A653 / A653M

Industry Standard: Z120 provides a foundational level of corrosion protection and is highly recommended over non-coated (black) steel for any application where moisture is a possibility.

Application

Internal Framing: Light gauge steel framing (LGSF) and stud walls within commercial buildings.
Metal Door Frames: Interior and protected exterior door and window frames.
Guttering and Downspouts: Standard applications in moderate climates.
Agricultural Equipment: Feed silos and equipment casings where exposure is controlled.

Advantages

Cost-Effectiveness: Highly competitive pricing point for standard corrosion protection needs.
Wide Availability: Z120 is a common global standard, ensuring reliable supply and quick turnaround.
Weldability & Paintability: The zinc layer is thin enough to allow for good weld quality (with proper ventilation) and excellent adherence for post-galvanization painting.
Good Formability: The hot-dip process ensures the material remains ductile for complex forming processes.

Payment & Shipping

Quality Control: Our Z120 coils undergo strict adherence testing (e.g., T-Bend) to ensure the zinc layer remains intact during forming.
Delivery Lead Time: Given its standard nature, Z120 often has the shortest lead time among galvanized products (15 days).
Shipping Certification: We provide full compliance with international environmental and material safety standards.

Frequently Asked Questions

Q: When should I choose Z120 versus Z275?
A: Choose Z120 for interior, dry, or well-protected exterior environments. Choose Z275 for harsh environments, coastal areas, or primary exposed roofing/siding where maximum corrosion protection is required.

Q: Does 120g/m簡 zinc coated steel require pre-treatment before painting?
A: Yes, painting galvanized steel always requires proper surface preparation (cleaning/degreasing) and often an etch primer to ensure mechanical and chemical adhesion of the topcoat.

CONTACT WITH US

Zhejiang Tiannv Color Steel Co., Ltd.

Enjoying good reputation from all the customers worldwide, we are the reliable partner you can trust in China.

Zhejiang Tiannv Color Steel Co., Ltd was established in January 2003, located in Zhejiang Province, which is a Sino-Hong Kong joint venture with a registered capital of 50 million RMB. As China 120g/m² Zinc Coated Steel Manufacturers and 120g/m² Zinc Coated Steel Factory, the company covers an area of 50000㎡, and a workshop area of 12000㎡. Company’s main products are hot galvanized steel coil, aluzinc coil, prepainted steel coils (PPGI / PPGL), prepainted aluminum coil, printed PPGI for household appliance, roofing/corrugated PPGI sheet, and PPGI paint. Currently, we have 85 skilled employees, 5 professional engineers and 15 experienced office personnel. The manufacture capability of our production line is nearly 100,000 metric tons per year.

Our company produces high quality color coated steel, and imposes strict quality control over the prepainted steel coils. We use good quality hot-dip galvanized steel coils or Alu-Zinc coated steel coils as base sheet and strictly select coated paints, which gives quality promise to customers and competitive advantage for our company.

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