What to Look For in a Clad Stainless Steel Frying Pan

What does 'clad' mean on a stainless steel frying pan?

Stainless steel is durable and easy to care for, but it moves heat slowly. Aluminium conducts heat more than ten times as well, and copper better still. Clad cookware bonds a layer of one of those conductive metals between sheets of stainless steel, so the pan spreads heat like aluminium while you cook on stainless steel. The layers can show as a thin line at the cut rim, and on our frying pans they do.

There are two common ways to do this, and they cook differently. A fully clad frying pan carries the bonded layers across the base and all the way up the walls. A disc-base frying pan, sometimes called impact-bonded or encapsulated, has a single-layer stainless body with a thick conductive disc attached to the underside of the base only.

Disc bases can heat the flat centre well, but the walls stay thin steel, so heat drops off where the disc ends. That matters in a frying pan, where you sear across the whole floor and toss food up the sides. A fully clad body heats more evenly edge to edge and responds more predictably when you turn the heat up or down.

• Look at the rim. On many fully clad pans you can see the layer lines where the metal is cut.
• Look at the underside. A disc base usually shows as a raised plate with a visible seam or step near the edge of the floor.
• Read the description for where the layers run. 'Fully clad' is a different construction from 'encapsulated base'.

Is 18/10 stainless steel better than 18/8?

Not in any way that matters much at the hob. Both stamps describe the same alloy family: type 304 austenitic stainless steel, the grade most widely used for food-contact cookware. The numbers are shorthand for roughly 18% chromium and 8% or 10% nickel. The ASTM A240 specification allows 304 a nickel content of 8.0% to 10.5%, so 18/8 and 18/10 are both inside the same grade rather than two rungs of a ladder.

Chromium forms the thin, self-repairing oxide film that makes the steel stainless. Nickel helps keep the steel's structure stable and adds some corrosion resistance and lustre. A couple of extra points of nickel can make a small difference to how bright the surface stays over the years, but the core layer, the thickness and the build quality affect how a frying pan cooks far more than 18/8 versus 18/10.

Two other stamps are worth recognising. 18/0, often sold as type 430, has almost no nickel and is magnetic, which is why it often appears on the outside of pans meant for induction hobs. Type 316 adds molybdenum for extra resistance to salt and chlorides; it shows up occasionally in cookware and costs more.

How do you check that a frying pan's base is flat?

A frying pan only browns evenly where it touches the heat. On ceramic and induction hobs, contact is direct, so a base that rocks or bows leaves cool patches.

Set the pan on a flat worktop and press gently on opposite sides of the rim. It should not rock. If you can, lay a straight edge across the underside and look for light under it. At home, a thin film of oil tells the same story: if it runs to the edges and pools in a ring, the centre is domed.

Flatness is also something you protect. Plunging a hot pan into cold water, or heating an empty pan on a high heat for a long time, is how frying pans warp. Let the pan cool before washing and preheat over a medium heat.

Riveted or welded handle: what details should you check?

The handle is the part you notice every day, so it deserves a close look. Riveted handles are fixed with metal rivets through the wall of the pan and are very secure. The trade-off is that the rivet heads sit inside the pan, where food can collect around them. Welded handles leave a smooth interior but depend on the quality of the weld.

Hold the frying pan the way you would when it is full. A handle angled slightly upwards keeps your hand away from the hob and gives leverage for tossing. A rounded or channelled grip is less likely to twist in your hand than a flat bar. Some larger frying pans add a small helper handle opposite the main one; check the loaded weight either way.

Any metal handle can get hot on the hob and will get hot in the oven. Keep a dry tea towel or oven glove within reach whatever the design.

How heavy should a stainless steel frying pan be?

Weight is a rough proxy for how much metal is in the pan, and metal is what stores and spreads heat. A frying pan that feels thin and light will usually swing in temperature when cold food goes in, and it is more prone to hot spots and warping.

Heavier is not automatically better. A frying pan you cannot lift comfortably with one hand is a frying pan you will avoid. The useful test is balance: pick the pan up by its handle and see whether it pulls sharply downwards at the front.

Should a stainless steel frying pan come with a lid?

A lid turns a frying pan into a pan you can braise, steam and gently finish in. It keeps splatter down and lets you cook eggs through without turning them. Many frying pans are sold without one, and a lid bought separately rarely fits as closely.

If a lid is included, check that it sits level on the rim without rocking and that its handle is fixed securely. Glass lids let you watch the food without lifting them; stainless steel lids are harder to break. Check the maker's instructions for the lid separately from the pan, because the two often have different oven limits.

What should a cookware guarantee and origin label tell you?

A warranty or guarantee is only as useful as its terms. Read what it covers, usually defects in materials and workmanship, and what it excludes, which commonly includes discolouration, scratches, damage from overheating or misuse, and ordinary wear. Check how you make a claim and whether you need proof of purchase.

In the UK, the Consumer Rights Act 2015 sets out what a guarantee given with goods must contain. It must be in plain and intelligible language, give the guarantor's name and address, state how long it lasts and where it applies, set out how to make a claim, and say that your statutory rights are not affected. The business must also make it available to you in writing on request. A guarantee comes on top of your statutory rights; it does not replace them.

Where a pan is made tells you less about its quality than its construction does, but a brand that states it plainly on the product and the listing is being straight with you, and that is a fair signal about everything else it says.

Which SEIDO frying pan size should you choose?

SEIDO frying pans come in 20 cm (8 in), 24 cm (9.5 in) and 28 cm (11 in), and each is sold with a matching stainless steel lid. Each has a tri-ply clad body: a 304 (18/8) stainless steel cooking surface over an aluminium core, with a magnetic 430 stainless steel exterior. All three sizes work on induction hobs, as well as gas, electric and ceramic. The cooking surface is uncoated, with no synthetic coating, and the pans are oven-safe to 260°C (500°F) for up to 1 hour, lid off.

Every frying pan carries a 5-Year Limited Warranty, and SEIDO cookware is made in China. The name derives from 精度 (seido), the Japanese word for precision — a standard, not a place of origin. The 24 cm (9.5 in) is the everyday size for one or two; the 28 cm (11 in) is the one to look at if you cook for more than two. See price on Amazon.