Tri Ply Stainless Steel Circle (SS304+Al+SS430) for Induction Cookware
Jiangsu Pusai Precision Finishing Technology Co., Ltd. · Nantong
Tri-Ply Stainless Steel Circle for Induction Cookware
Our tri ply stainless steel circle is a roll-bonded clad blank in SS304 + Pure Al (1050/1060) + SS430, with batch-verified peel strength 28–45 N/mm and ex-stock dies Φ205–550 mm — manufactured by Jiangsu Pusai, controlled subsidiary of Yongjin Shares (SSE: 603995).
📏 Stock Dies Φ205–550 mm
🔬 Peel 28–45 N/mm · MTC per Coil
⚡ Samples in 7 Days
How Jiangsu Pusai Delivers Bond Strength and Speed
Every tri ply stainless steel circle leaving our Nantong plant is bonded, annealed, blanked and tested in-house — one quality system from raw coil to export pallet.
- Full chain control: Tsingshan raw material → Yongjin precision cold rolling → Pusai roll bonding
- Peel strength measured per coil to GB/T 2792-2014 / GB/T 6396-2008, MTC shipped with every lot
- Ex-stock dies Φ205–550 mm in 5 mm increments — no tooling cost on standard sizes
- Fast export documentation + quick container booking, FOB / CIF Ningbo / Shanghai
- ISO 9001:2015 & ISO 14001:2015 certified (CQM / IQNET international recognition)
Verified Strength. Massive Die Library. Fast Export.
📦 CURRENT STOCK DIES
Full coverage Φ205–550 mm; dual die sets (e.g. Φ385/390/405/410) secure peak-season capacity. Custom diameters: tooling quoted separately.
Technical Specifications
Structure
304 + Al + 430Roll-bonded three layers
Thickness
1.5–3.1 mmClad coil capability to 6.0 mm
Diameter
Φ205–550 mm5 mm increments, stock dies
Tensile / Yield
345–370 / 246–277MPa, batch measured
Elongation
40–42%Deep drawing without cracking
Peel Strength
28–45 N/mmGB/T 2792-2014 / GB/T 6396-2008
Dual-MTC Data Wall (as shipped)
| MTC No. | Thickness | Tensile (MPa) | Yield (MPa) | Elongation | Peel 304/Al | Peel 430/Al | Peel standard |
|---|---|---|---|---|---|---|---|
| JSPS20250327068 | 1.79 mm | 370 | 277 | 40% | 29 N/mm | 45 N/mm | GB/T 2792-2014 |
| JSPS20260922329 | 2.50 mm | 345 | 246 | 42% | 28 N/mm | 35 N/mm | GB/T 6396-2008 |
🔬 Bond Strength You Can Verify
Each production batch of tri ply stainless steel circle ships with an MTC reporting tensile, yield, elongation and peel strength per interface — the figures below are taken directly from shipped certificates.
🏭 In-House Precision Manufacturing
Our Siemens-controlled 1450 mm roll-bonding mill runs at 10–15 m/min — over twice the industry average of 4–5 m/min — while hydrogen bright annealing with automatic temperature control keeps mechanical properties stable coil after coil.
Applications: Engineered for Every Cookware Line
One tri ply stainless steel circle platform covers six cookware families — from thin fry-pan bases to thick pressure-cooker bottoms:
🍳 Frying Pans & Skillets
Even-heat bases, induction compatible.
🍲 Stock Pots & Sauce Pans
Thick-gauge blanks (2.5–3.1 mm) for deep bodies.
♨️ Pressure Cookers
High elongation for deep drawing without cracking.
🥘 Woks & Specialty Cookware
Large diameters up to Φ550 mm.
🧲 Induction Cookware Bases
Magnetic SS430 layer for induction hobs.
🥇 5-Ply & Custom Stacks
SS304+Al+3003+Al+SS430 on request.
Two Supply Models, One Reliable Partner
⚡ Stock-Die Blanks
- No tooling cost — use existing dies Φ205–550 mm
- Short lead time, flexible MOQ (typically 1–3 t per size)
- MTC with peel strength shipped per coil
Ideal for: urgent programs, SKU trials and seasonal capacity.
🛠 Custom-Die & Custom-Stack Blanks
- New tooling for custom diameters beyond stock range
- Layer ratio 5%–95%, clad coil 0.5–6.0 mm
- 5-ply (304+Al+3003+Al+430) on request
Ideal for: proprietary cookware lines and premium induction ranges.
✅ Compliance & Certifications
- ISO 9001:2015 No. 00225Q24891R1M (valid to 2028-09-03)
- ISO 14001:2015 No. 00225E33333R0M (valid to 2028-08-28)
- IQNET / CQM international mutual recognition
- Tensile per GB/T 228.1-2021; peel per GB/T 2792-2014 / GB/T 6396-2008
Export-grade delivery: seaworthy moisture-proof packing with wooden pallets and steel strapping; mix-size loading supported to optimize your freight cost.
Frequently Asked Questions
What is the MOQ for stock-die diameters?
For standard diameters (Φ205–550 mm) on existing dies, MOQ is flexible — typically 1–3 tons per size. Custom diameters requiring new tooling are quoted case by case.
Are the circles induction compatible?
Yes — every tri ply stainless steel circle carries the magnetic SS430 layer as its outer face, providing the induction base for hobs.
Which test standards do you follow?
Tensile per GB/T 228.1-2021; peel per GB/T 2792-2014 and GB/T 6396-2008. Every coil’s MTC reports the measured values.
Can you customize thickness and layer ratio?
Yes. Clad coil 0.5–6.0 mm with layer ratios 5%–95%; circle gauges 1.5–3.1 mm are standard.
Do you supply blanks for honeycomb / embossed cookware?
Yes — plain tri-ply blanks suitable for downstream honeycomb embossing or etching processes.
What is the sample lead time?
Stock-size samples ship in about 7 days, with an MTC copy included.
🇻🇳 Dành cho đối tác Việt Nam
Cung cấp vòng tròn inox 3 lớp (Tri-ply circle) cho nhà máy nồi chảo:
- Sẵn khuôn dập Φ205–550 mm — không phí mở khuôn.
- Lực bóc tách lớp 28–45 N/mm, kèm MTC từng lô hàng.
- Đầy đủ CO / CQ, chứng chỉ ISO 9001 / ISO 14001.
Looking for a reliable tri-ply circle supplier with verified bond strength?
Buy tri ply stainless steel circle blanks in bulk, direct from the mill. 📩 morgan@yongjinss.com · 🌐 yongjinss.com · 🛒 Stock dies Φ205–550 mm ex-works
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