0.3mm DX51D / SPCC Hot Dipped Galvanized Steel Coil with Big Spangle Surface for

Product Specification

0.3mm DX51D / SPCC Hot Dipped Galvanized Steel Coil with Big Spangle Surface for Boiler Plate and Industrial Panel Processing

1. Product Overview

Hot dipped galvanized steel coil for boiler plate and industrial sheet components is used where basic corrosion protection, stable sheet formability, and continuous processing efficiency are required. In this type of application, the zinc coating helps reduce oxidation during storage, transport, and service, while the cold rolled base supports better dimensional consistency in downstream fabrication.

For 0.3 mm light-gauge processing, the material is commonly converted into cut-to-length sheets, bent panels, and stamped parts. Big spangle surface is often selected when a conventional galvanized appearance is acceptable and no decorative paint-free fine finish is required.

2. Technical Solution

Product performance is based on the following technical characteristics:

• Continuous hot dip galvanizing with controlled zinc coating mass
• Zinc layer providing barrier protection and sacrificial protection
• DX51D and SPCC base options for common forming and sheet fabrication
• Big spangle surface for standard visible galvanized appearance
• Passivated, oiled, or anti-finger treatment for storage and handling control

In practical use, 0.3 mm material is often chosen for light industrial panels and outer sheet parts. Forming stability depends on the balance between tensile strength, elongation, and surface condition, especially in bending, folding, and punching operations.

3. Specifications

4. Application

• Boiler outer panels and sheet housings
• Industrial covers and fabricated enclosures
• Electrical cabinets and control box parts
• Appliance back panels and internal sheet parts
• Roofing sheets and light building panels
• General cut-to-length and slit-strip fabrication

5. Processing

• Cut-to-length sheet production
• Slitting into narrow strips
• Bending and folding
• Stamping and punching
• Light roll forming
• Surface painting or secondary coating when required

6. Advantages

• 0.3 mm light gauge is suitable for thin sheet panel fabrication
• DX51D and SPCC grades support common industrial forming operations
• Big spangle offers a standard galvanized surface appearance
• Wide zinc coating range supports different service environments
• Passivated, oiled, and anti-finger options improve storage and downstream handling
• Standard coil dimensions fit common decoiling, slitting, and cut-to-length equipment

7. How to Choose

• Thin industrial panels and covers → 0.3 mm is commonly selected
• Visible galvanized finish → big or regular spangle is often preferred
• Painting or cleaner surface requirement → minimized or zero spangle is usually preferred
• Longer storage before fabrication → passivated or oiled surface is commonly selected
• General indoor fabrication → medium coating may be sufficient, while more exposed use usually requires higher coating levels

8. FAQ

Q1: Is this product suitable for boiler pressure vessel fabrication?
This specification is generally used for boiler-related outer panels, housings, and sheet components, not as a substitute for certified pressure vessel plate unless separately specified.

Q2: What is the difference between DX51D and SPCC for this application?
DX51D is commonly used for galvanized forming applications, while SPCC is often used as a cold rolled base option for general sheet processing.

Q3: Can 0.3 mm galvanized coil be processed into sheets?
Yes, it is commonly cut to length into sheets or slit into narrower strips for downstream fabrication.

Q4: Which surface treatment is suitable before storage and transport?
Passivated or oiled surface is commonly selected to improve temporary corrosion resistance during storage and shipment.

Q5: Is big spangle suitable for industrial panel applications?
Yes, big spangle can be used when a standard visible galvanized finish is acceptable and a fine uniform appearance is not required.