Z30-Z275 Galvanized Steel refers to galvanized steel with zinc coating weights ranging from 30 g/m² to 275 g/m² (total for both sides). This represents Wanzhi Group’s core and best-selling coating range. The zinc coating determines its corrosion resistance lifespan in various environments and significantly influences pricing.
Z30-Z275
Z30-Z275 Galvanized Steel: The “Z” denotes the zinc coating weight, while the numbers represent the total galvanized coating weight per square meter on both sides of the steel sheet.
Applications
| Coating Thickness | Applications |
| Z30 – Z60 | Indoor cable trays, ordinary chassis casings, structural parts in dry storage environments, and some inner panels of household appliances. |
| Z80 – Z120 | Light steel keels, components of ordinary industrial plants, ventilation ducts, agricultural equipment, general outdoor guardrails, and base plates for roof and wall panels of civil buildings. |
| Z150 – Z200 | Non-directly coastal buildings in coastal areas, outdoor high-voltage power towers, highway guardrails, large industrial storage structures, and steel for containers. |
| Z250 – Z275 | Offshore engineering facilities, areas with severe industrial pollution, permanent structures in long-term humid or high-salt-mist environments, and bridge auxiliary components. |
Surface Effects
Regular spangle: Naturally formed snowflake or spangle patterns through cooling crystallization, the most common surface offering both decorative appeal and practicality.
Zero spangle: Suppresses zinc flower growth via specialized processes, resulting in a uniformly smooth surface ideal as a substrate for high-precision coating applications.
Fine spangle: Characterized by a fine, uniform pattern, this is the preferred substrate surface for architectural color-coated steel sheets (PPGI).
Core Features
Cathodic Protection: The zinc coating acts as a sacrificial anode, prioritizing corrosion to shield the steel substrate even when partially exposed. This protection spans applications from mild indoor environments to extreme corrosion conditions.
Superior Processability: Retains excellent formability, bending, and welding properties after galvanization.
Low Total Cost of Ownership: Combining initial cost savings with long-term maintenance-free advantages, the Z30-Z275 coating range offers the most cost-effective solution.
Z30-Z275 Galvanized Products
To meet diverse customer requirements for processing, application, and trade, Wanzhi Group has developed a comprehensive product matrix of Z30-Z275 galvanized steel, encompassing coils, plates, strips, sheets, pipes, structural components, and more, with customized specifications available.
Z30-Z275 GI Coil /Galvanized Steel Coil
As the foundational form of the entire product line, these coils are directly produced from hot-dip galvanizing lines and serve as core raw materials for subsequent processing. Flexible specifications are available, with widths ranging from 600-1250mm and thicknesses from 0.15-6.0mm. Surfaces can be covered with PE protective film.
Applications: Raw material for products such as flat-rolled sheets, profiled sheets, and sections, suitable for large-scale production requirements.
Z30-Z275 GI Sheets/Galvanized Steel Sheets
Produced by flattening and cutting galvanized steel coils to precise dimensions using high-precision leveling and slitting equipment. Features excellent flatness and dimensional accuracy (length tolerance ±0.5mm, width tolerance ±0.1mm). Common thicknesses range from 0.12-6.0mm, widths from 600-1500mm, with custom lengths available.
Applications: Directly used for stamping, bending, welding, and other processing. Suitable for producing small-to-medium components such as appliance panels, electrical enclosure housings, equipment brackets, and architectural decorative panels.
Z30-Z275 GI strips /Galvanised Steel Strips
Narrow-width galvanized products typically range from 10-600mm in width and 0.12-3.0mm in thickness, available in custom lengths per customer requirements.
Features: Uniform zinc coating, high dimensional accuracy, and excellent bending and stamping performance.
Applications: Precision small parts production including hardware fittings, fasteners, springs, battery casings, and automotive interior components. Also serves as packaging steel strapping or bundling tape.
Z30-Z275 GI Panel /Galvanized Steel Panel
Sheet material with embossed structures formed by roll forming from galvanized steel coils.
Products: Corrugated sheets, closed/open-ended floor decking panels, sandwich panels, etc.
Features: Enhanced bending resistance and wind load capacity through profiling; can be combined with core materials to form thermal insulation/soundproof sandwich panels. Applications: Primarily used for roof and wall panels in industrial plants and warehouses, enclosure structures for prefabricated buildings, and exterior walls of modular homes.
Z30-Z275 GI Tube /Galvanised Steel Tube
Manufactured by bending and welding galvanized steel sheets or strips into tubes, followed by hot-dip galvanizing; or directly hot-dip galvanizing seamless steel pipes, ensuring uniform zinc coating on both inner and outer surfaces.
Products: Galvanized square tubes, galvanized round tubes, etc.
Features: Diverse specifications, comprehensive corrosion resistance, customizable to requirements.
Applications: Water supply/drainage pipelines, gas pipelines, fire protection pipelines, agricultural irrigation pipelines, outdoor equipment support tubes, construction scaffolding tubes, etc.
Z30-Z275 GI Structure /Galvanized Structural Steel
Addressing structural requirements for buildings and industrial equipment, Wanzhi Group provides cold-forming, welding, and assembly services for galvanized steel.
Products: C-channels, Z-purlin, angle steel, square/rectangular tube structures, equipment frames, warehouse shelving frameworks, etc. Features: Precise dimensions, robust structures, intact galvanized coating throughout processing, ready for on-site installation.
Applications: Steel structure building support systems, industrial equipment frames, warehouse logistics shelving, municipal transportation facilities, and similar scenarios.
Z30-Z275 PPGI Steel
A composite coating product formed by surface pretreatment, painting, and curing on a Z30-Z275 galvanized steel substrate.
Products: PPGI coil, PPGI sheet, PPGI panel, PPGI strip, etc.
Features: Combines the corrosion resistance of galvanized steel with the weather resistance and decorative properties of the coating.
Applications: Building exterior walls, roof cladding panels, appliance housings, high-end hardware fittings, etc.
Coil Packaging – Wanzhi Group
Wanzhi Group is a metal materials manufacturer based in China. Our factory holds certifications including ISO9001, ISO14001, and ISO45001, offering one-stop supply for all forms of galvanized products. Additionally, we provide comprehensive services spanning product selection, sample testing, production control, and packaging/shipping logistics. To prevent damage during land and sea container transport, we employ rigorous export packaging protocols. These include: internal protection, reinforcement and labeling, structural securing, and palletization (optional standard) across multiple layers. This ensures every order arrives intact at the customer’s destination.
Z30-Z275 Galvanized Steel Customer Feedback
Indeed, Wanzhi Group’s Z30-Z275 Galvanized Steel series has earned global recognition and trust through consistent quality, precise specification control, and comprehensive service. To date, we have received positive feedback from customers in over 40 countries and regions worldwide, with end-users spanning construction, automotive, home appliances, industrial, energy, mining, and other sectors.
Whether you are a factory or trader requiring bulk purchases of galvanized products, or an end-user needing customized, deep-processed structural components, Wanzhi Group’s Z30-Z275 Galvanized Steel Series can precisely meet your needs. Contact us immediately to obtain free samples, detailed technical specifications, and a customized quote!