Comprehensive technical data, chemical composition, and metallurgical comparison for OEM cookware base plate manufacturing.
Understanding the atomic structure behind induction thermal response is crucial for procurement managers and production engineers evaluating material performance.
Induction hobs generate high-frequency magnetic fields that induce eddy currents inside the vessel base. For energy transfer to convert into heat, the base metal must possess strong magnetic permeability.
SS 430 (EN 1.4016) features a body-centred cubic (BCC) crystal structure. This ferritic lattice maintains permanent magnetic properties, creating optimal magnetic flux density and rapid heating response when exposed to induction coils.
In contrast, SS 304 (EN 1.4301) is an austenitic grade with a face-centred cubic (FCC) structure caused by its nickel content. Austenitic stainless steel is non-magnetic; an induction cooktop will fail to detect an SS 304 base disc, making heat transfer impossible.
When bonded to an aluminium or copper vessel body, base plates undergo continuous thermal cycling from ambient room temperature up to 250°C during cooking operations.
SS 430 exhibits a coefficient of thermal expansion closely matched to cast and pressed aluminium alloys. This minimizes interfacial shear stress between the bonded metal layers during rapid heating and cooling cycles.
This thermal compatibility prevents base plate buckling, peripheral lifting, and catastrophic bond delamination, guaranteeing long-term durability for premium non-stick, hard-anodised, and tri-ply cookware lines.
Side-by-side metallurgical and mechanical property benchmarks essential for cookware design and engineering sign-off.
| Mechanical & Physical Property | SS 430 (Ferritic — Our Standard) | SS 304 (Austenitic) | Mild Steel (Carbon Steel) |
|---|---|---|---|
| International Standard | EN 1.4016 / AISI 430 / JIS SUS430 | EN 1.4301 / AISI 304 / JIS SUS304 | IS 2062 / ASTM A36 |
| Crystal Lattice Structure | Ferritic (Body-Centred Cubic) | Austenitic (Face-Centred Cubic) | Ferritic / Pearlitic |
| Induction Compatibility | Optimal — High Magnetic Permeability | Incompatible — Non-Magnetic | High — Requires Anti-Rust Coating |
| Tensile Strength (Rm) | 450 – 600 MPa | 520 – 720 MPa | 400 – 550 MPa |
| Yield Strength (Rp 0.2%) | ≥ 280 MPa | ≥ 210 MPa | ≥ 250 MPa |
| Elongation at Break (A50mm) | ≥ 22% (Deep-Draw Qualified) | ≥ 45% | ≥ 20% |
| Hardness (Rockwell B) | 75 – 85 HRB | 70 – 85 HRB | 60 – 75 HRB |
| Chromium Content (Cr %) | 16.0% – 18.0% | 17.5% – 19.5% | < 0.25% |
| Nickel Content (Ni %) | ≤ 0.50% (Nickel-Free) | 8.0% – 10.5% | Negligible |
| Corrosion Resistance | High (Dishwasher & Humidity Safe) | Very High (Acid / Salt Resistant) | Low (Prone to Oxidation / Rust) |
| Food Contact Compliance | Compliant — EU Regulation 1935/2004 | Compliant — Universal Food Grade | Non-Compliant Uncoated |
While SS 304 offers superior pitting resistance against organic acids in cooking vessels, it cannot generate induction heat. SS 430 delivers the precise balance of high magnetic attraction, high mechanical yield for press bonding, and sufficient chromium protection to resist atmospheric corrosion and automated dishwashing chemicals.
Strict chemical control ensures precise stamping behavior, consistent grain orientation, and predictable magnetic coil reaction across production batches.
Forms a self-healing passive chromium oxide surface film that provides robust corrosion protection against moisture, detergents, and steam environments.
Maintained at low limits to minimize chromium carbide precipitation during thermal impact, preserving ductility and preventing intergranular cracking.
Enhances hot-workability and matrix density during cold rolling, blanking, and deep-drawing operations inside our press shops.
Over 50 years of cold-forming experience allows us to stamp complex hole patterns, custom radii, and rigid profiles without edge distortion or work-hardening stress.
Circle-cut discs processed with minimal shear burr to prevent stress risers and maintain exact perimeter concentricity.
Precision punching of magnetic contact holes and logo stampings engineered around heat transfer distribution.
Hydraulic leveling ensures residual stresses are relieved, delivering flat induction plates ready for impact bonding or brazing.
100% optical and dimensional verification against buyer CAD drawings and specification sheets prior to export packaging.
Detailed answers for technical sourcing leads, quality auditors, and product development managers.
Standard SS 430 induction base discs are manufactured in gauges ranging from 0.4 mm to 0.6 mm. A gauge of 0.45 mm to 0.50 mm is most commonly specified for friction-welded or impact-bonded non-stick aluminium pans, providing robust magnetic pickup without adding excessive tare weight.
We source prime stainless steel coils from certified primary mills. Every batch is certified according to EN 10204 3.1 standards. Shipments include full spectral breakdown confirming Chromium content between 16-18%, verifying compliance with EU REACH, RoHS, and US FDA food-contact guidelines.
Yes. All die tooling, progressive punches, and embossing blocks are designed and cut in our in-house toolroom. We manufacture build-to-print induction base plates tailored directly to your engineering drawings, brand logos, and hole configurations.
Send us your technical drawings, required disc diameters, and annual production volumes for immediate technical review.
