This article references the authoritative source “Encyclopedia of Metal Materials” to provide a detailed analysis of the performance characteristics and machining key points of 430FR (electromagnetic stainless steel). In CNC machining and metal parts manufacturing, stainless steel is one of the most commonly used materials.
1. 430FR Basic Information
430FR, commonly known as electromagnetic stainless steel, is a ferritic stainless steel. Due to its ferromagnetism (high magnetic permeability) and good corrosion resistance, it is particularly suitable for electromagnetic induction heating applications (such as rice cooker inner pots). Unlike the common 304 austenitic stainless steel (non-magnetic), 430FR can be inductively heated by induction cooktops, making it widely used in the kitchen appliance field.
2. Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤0.12 |
| Silicon (Si) | ≤0.75 |
| Manganese (Mn) | ≤1.00 |
| Phosphorus (P) | ≤0.040 |
| Sulfur (S) | ≤0.030 |
| Chromium (Cr) | 16.00-18.00 |
| Nickel (Ni) | ≤0.60 |
3. Mechanical Properties (Annealed State)
| Property | Value |
|---|---|
| Tensile Strength | ≥450 MPa |
| Yield Strength | ≥205 MPa |
| Elongation | ≥22% |
| Hardness | ≤183 HB |
4. Magnetic Characteristics (Key to Electromagnetic Heating)
430FR is a ferritic stainless steel with stable ferromagnetism, and its magnetic permeability is much higher than that of 304 austenitic stainless steel. This characteristic enables it to generate induced eddy currents and heat efficiently in alternating magnetic fields, making it an ideal material choice for rice cooker inner pots, induction cooktop cookware, and IH electric heating equipment inner pots/pans.
5. Corrosion Resistance
430FR performs as follows in the following environments:
- Atmospheric environment: Good atmospheric corrosion resistance
- Fresh water: Suitable for fresh water environments
- Weak acids and alkalis: Fair; corrosion resistance is inferior to 304
- Chlorides: Poor; not suitable for high-chloride environments
6. Typical Applications
- Kitchen appliances (rice cooker inner pots, induction cooktop cookware)
- Kitchenware (tableware, cookware)
- Architectural decoration (curtain walls, handrails)
- Structural components for household appliances
- CNC machined parts (precision components, connectors)
7. CNC Machining Performance
CNC machining characteristics of 430FR:
- Medium toughness: Relatively easy to cut, better than 304
- Work hardening: Lower degree than austenitic stainless steel
- Thermal conductivity: Better than 304, but cooling is still required
- Cutting speed: 100-150 m/min
- Tool selection: Carbide tools, coated tools
8. Purchasing Guide
Market price reference:
- Sheet/Plate: 10-18 RMB/kg
- Bar/Rod: 12-20 RMB/kg
- Tube/Pipe: 15-25 RMB/kg
Quality verification:
- Check the material test certificate (MTC)
- Confirm composition via spectral analysis
- Surface inspection for no cracks or slag inclusions
9. Our Services
Dongguan Stirling Metal Products Co., Ltd. professionally provides 430FR material + CNC machining One-Stop Service:
- ✅ Material procurement: Genuine material guarantee, complete material certificates
- ✅ CNC machining: Precision ±0.01mm, smooth surface finish
- ✅ Prototype production: Fast delivery in 3-5 days
- ✅ Mass production: 7-15 day delivery lead time
- ✅ Surface treatment: Polishing, brushing, electroplating
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