TriPly Stainless Steel Circle (SS304+Al+SS430) for Induction Cookware
Jiangsu Pusai Precision Finishing Technology Co., Ltd. · Nantong
TriPly Stainless Steel Circle for Induction Cookware
Our triply 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 triply 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 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.
Live commercial terms (MOQ, lead time, packing) for triply stainless steel circle blanks are listed on the product page.
Also known as: triply circle, tri-ply circle, 3 ply / three ply stainless steel circle, aluminium cladded circle.
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 triply 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 triply 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 triply stainless steel circle diameters (Φ205–550 mm) on existing dies, MOQ is flexible — typically 1–3 tons per size.
Are the circles induction compatible?
Yes, every Tri-ply(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 triply stainless steel circle blanks in bulk, direct from the mill. 📩 morgan@yongjinss.com · 🌐 yongjinss.com · 🛒 Stock dies Φ205–550 mm ex-works
Ready to order? View triply stainless steel circle blanks & request a bulk quote →
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