What is G90 Steel
G90 steel is a type of galvanized steel that meets the coating requirements outlined in ASTM A653. This standard specifies the zinc coating applied to cold-rolled steel sheets to enhance corrosion resistance and durability. The “G90” designation means the steel has a zinc coating weighing a minimum of 0.90 ounces per square foot, applied evenly on both sides of the steel. This coating thickness translates to approximately 1.2 mils (0.0012 inches) per side, offering reliable protection against rust and corrosion in various environments.
Compared to other galvanized coatings, G90 provides a heavier zinc layer than G60 (0.60 ounces per square foot) but less than G115 (1.15 ounces per square foot). This makes G90 a balanced choice for projects requiring strong corrosion resistance without the added cost associated with thicker coatings. Its zinc layer is applied via hot-dip galvanizing, which bonds the zinc metallurgically to the steel surface, ensuring long-lasting protection.
Understanding these coating specifications helps when selecting galvanized steel for applications where corrosion resistance and material longevity are critical. If you are working with cold-rolled steel, explore our range of options including various coatings and processing capabilities for precision projects.
Key Applications of G90 Steel
G90 steel is widely used across various industries thanks to its durable zinc coating and corrosion resistance. Here’s where you’ll often find it:
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Construction: G90 steel is a go-to for roofing and siding. Its zinc coating ensures long-lasting protection against the elements, making it ideal for building exteriors that need to stand up to weather and wear.
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Solar Industry: It’s commonly used for solar panel frames and mounting structures. The corrosion resistance helps protect expensive solar equipment and extends the lifespan of installations.
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HVAC Systems: Ductwork and ventilation components often rely on G90 steel. The coating prevents rust and keeps systems running smoothly in both residential and commercial settings.
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Automotive Industry: G90 steel is used for certain body panels and undercarriage parts where corrosion resistance is a must, without adding too much weight.
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Other Industrial and Commercial Uses: From electrical enclosures to agricultural equipment and shelving, G90 steel fits many applications that require a strong, corrosion-resistant steel with good forming qualities.
Its versatility and reliability make G90 steel a staple in many U.S. markets where durability and cost matter.
Benefits of Using G90 Steel
G90 steel stands out mainly for its excellent corrosion resistance. Thanks to its zinc coating, it offers long-lasting protection against rust, making it a reliable choice for outdoor and harsh environments. This durability means fewer repairs and replacements over time, saving money in the long run.
When it comes to cost-effectiveness, G90 steel strikes a great balance. Compared to other galvanized coatings like G60 or heavier options like G115, it provides solid protection without a premium price tag. This makes it a popular option for projects where budget and quality both matter.
G90 steel also performs well when it comes to formability. It bends and shapes easily without cracking, which is ideal for manufacturing custom parts or complex designs. This flexibility helps reduce waste and speeds up production.
From an environmental standpoint, G90 steel is recyclable, which helps reduce waste and supports sustainability efforts. Using galvanized steel like G90 can lower the environmental impact compared to coatings that are harder to recycle or dispose of safely.
Overall, if you need a cost-effective, durable, and flexible steel with good environmental credentials, G90 steel is a solid choice. For related materials options, check out our resources on cold-rolled steel to see how different steel types compare.
Challenges and Considerations with G90 Steel
While G90 steel offers excellent corrosion resistance and durability, there are a few challenges to keep in mind:
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Warpage in Thin Sheets
Thin G90 steel sheets can sometimes warp or distort during processing, especially when bending or cutting. This happens because the zinc coating reacts differently to heat and pressure than the steel itself. Proper handling and skilled CNC machining can help minimize these issues.
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Limitations in Painting
Unlike galvanealed steel, G90 galvanized steel doesn’t hold paint as well. The shiny zinc coating can make it harder for paint to stick, which means surface prep has to be thorough. If painting is a key part of your project, this is something to plan for.
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Corrosion from Contact with Incompatible Materials
G90 steel is great against rust, but if it touches certain metals like copper or brass without a proper barrier, it can cause galvanic corrosion. That’s because zinc reacts with those metals in a way that speeds up corrosion. Avoid direct contact or use insulating materials where possible.
Understanding these factors helps you get the most out of G90 steel in your projects without surprises. For precise steel processing that handles these challenges well, check out our CNC services designed for galvanized materials.
HYCNC’s CNC Processing for G90 Steel
At HYCNC, we specialize in precision CNC machining for G90 steel, a galvanized steel known for its corrosion resistance. Our team handles cutting, bending, and finishing with accuracy that meets tight project requirements. Whether you need parts for construction, automotive, or HVAC applications, we customize every order to fit your specific industry needs.
We strictly follow ASTM A653 standards to ensure the zinc coating and steel quality stay intact throughout processing. This means your final product maintains the durability and corrosion resistance that G90 steel promises. Choosing HYCNC means reliable service, consistent quality, and the expertise to handle complex jobs efficiently.
Here’s why HYCNC is the smart choice for your G90 steel processing:
- Precision cutting and bending that protects the zinc coating
- Custom solutions tailored to your size and tolerance requirements
- Strict quality control and compliance with ASTM standards
- Fast turnaround times without sacrificing accuracy
- Experienced team familiar with galvanized steel behaviors
When you work with HYCNC, you get CNC machining services designed to preserve the strengths of G90 steel while meeting your project’s exact specs.
How to Choose the Right G90 Steel Supplier and Processor
Picking the right supplier and processor for G90 steel is key to getting the quality and performance you need. Here are some important points to keep in mind:
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Coating Uniformity and ASTM Compliance
Make sure your supplier follows ASTM A653 standards for coating thickness and zinc amount. Uniform zinc coating ensures better corrosion resistance and longer life. Ask for test reports or certifications to confirm this.
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Reliable CNC Machining Partner
G90 steel requires precise cutting, bending, and finishing to avoid damaging the protective zinc coating. Choose a processor experienced in CNC machining galvanized steel who understands how to handle it properly without causing warpage or coating cracks.
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Clear Project Specifications
Be specific about your project needs—thickness, dimensions, finishes—early on. This helps strike the right balance between cost and quality. Over-specifying can drive up prices, while under-specifying might lead to parts that don’t meet performance or durability standards.
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Supplier Reputation and Support
Look for suppliers with a solid track record and good customer support. They should be able to provide samples, technical advice, and meet delivery deadlines reliably.
By focusing on these factors, you’ll secure a supplier and processor that can deliver G90 steel parts that meet your project goals while staying within budget.
Check out our CNC machining services for related materials like cold-rolled steel to see how we handle precision work: cold-rolled steel.