Prepainted Steel Sheet for Microwave Oven Shell
PPGI.LTD supplies prepainted steel for microwave shells only after checking where each part sits. Heat, grease, cleaners, and stamping vary by part. We build the material specification from the actual casing location.
What Heat and Cleaning Exposure Will the Casing See?
Start with the real part location, not a general temperature claim.
| Question | Why it matters | Order input |
|---|---|---|
| Where is the panel? | Heat differs around the casing | Part location |
| How hot and how long? | Peak and continuous heat differ | Time and temperature |
| What cleans it? | Chemicals affect the finish | Cleaner and frequency |
We can review the coating against the stated conditions. We do not assign one temperature limit to every microwave casing.
Will the Sheet Fit Stamping and Shearing?
The line needs the right steel, size, and surface protection.
| Line item | What can go wrong | What we confirm |
|---|---|---|
| Grade and thickness | Poor forming or stiffness | Part drawing |
| Width and tolerance | Feed or blank mismatch | Line limits |
| Film and lubricant | Marks or residue | Process compatibility |
NCCA guidance on forming prepainted metal explains why flexibility, tooling, and machine dimensions must be checked together. We can prepare trial material for difficult parts.
Which Compliance Documents Does the Part Need?
An outer casing is not the same as a food-contact surface.
| Part position | First question | Document direction |
|---|---|---|
| Outer shell | Does it contact food? | Market material rules |
| Internal shield or liner | What can touch it? | Part-specific review |
| Electrical product | Which market receives it? | Buyer compliance list |
Tell us the market and part position. We can match available material records, but the finished-appliance producer owns final compliance.
Buyer Concern & FAQ
What temperature can microwave casing PCM steel withstand?
It depends on the coating, part location, temperature, and exposure time. Give us those conditions so we can review the material.
Is food-contact compliance required for the outer shell?
Usually the outer shell is not a direct food-contact surface. The buyer must still confirm the part and market requirements.
Can the sheet be used for deep-stamped casing parts?
Yes, when the grade, coating, draw, tooling, and lubricant are compatible. Use a trial for demanding parts.
How is grease and cleaner resistance verified?
Test the actual coating with the named grease or cleaner, concentration, temperature, contact time, and acceptance rule.
