GRILLROSTPROFI Gusseisen-Grillrost rund

A cast grate for the 47 cm kettle

This grate is a replacement part. It goes into a kettle grill with a 47 cm kettle diameter, rests on the supports where the old grate used to sit, and holds the food over the embers. It has no further function, and it needs none.

Amazon lists it as “Gusseisen-Grillrost, rund für Kugelgrill 47 cm Ersatz für Weber” with model number 104. In the manufacturer’s shop it is a variant of the item “Gusseisen Grillrost in verschiedenen Maßen”, described as “45 cm, passend für 47er Kugelgrill (auch Weber)”. There too, the variant carries the number 104. Because the numbers match, we assume both listings refer to the same part.

The brand is called Grillrostprofi. If you type in grillrostprofi.de, you are redirected to edelstahl-grillrost.de, a shop with the Grillrostprofi logo that mainly sells stainless steel grates. Cast iron is the smaller department there. On our site the grate is listed under Grill accessories, and on the Amazon page it stood at €49.99 on 20.10.2026.

What the photo shows, and what the catalogue figures allow

The product image shows a flat, black disc. A closed ring runs around the outside, and inside, bars cross in two directions diagonal to the image axis, with diamond-shaped openings between them. No handles, hinges or hinged segment are visible. In the photo the grate looks like a single cast piece.

The manufacturer gives Ø 45 cm. The Amazon catalogue lists 17.72 by 17.72 by 0.35 inches, which converts to approx. 45 by 45 by 0.9 cm. For a round part, length and width are both the diameter, so the figures fit together. The 0.9 cm height comes from the catalogue alone; whether it refers to the thickness of the bars or of the ring is unclear.

On weight, the sources differ by 200 grams. The shop page states approx. 3.7 kg. The Amazon text says approx. 3.9 kg, and the catalogue field lists 8.598 pounds, which also works out at approx. 3.9 kg. Our data sheet therefore gives both values. For use, the difference does not matter; as to which figure is correct, we have no third source.

Material according to the manufacturer: “langlebiges, emailliertes Gusseisen” (durable, enamelled cast iron), colour black, one grate per pack. The Amazon text adds that cast iron is easily recyclable, less energy-intensive to produce “than other steels”, and has high resistance to corrosion and wear. No figures are attached to any of these claims. And strictly speaking, cast iron is not steel at all: it contains more than 2 per cent carbon, steel less.

In detail: what cast iron changes about a grate

A grill grate has two jobs. It absorbs heat from the embers, via radiation and via the hot air rising through the kettle, and it passes that heat on where the food rests. How well that works depends mainly on the mass of the grate and the width of the contact surface.

Mass is the big difference. Cast iron and stainless steel store roughly the same amount of heat per kilogram; the specific heat capacity of both is around 0.5 joules per gram and kelvin. The round stainless steel grate that the same manufacturer sells for 47 cm kettle grills weighs 1.0 kg. This cast grate, at 3.7 kg, weighs almost four times as much. Brought to the same temperature, it therefore holds roughly four times as much heat. If you put on cold steaks, the heavy grate cools less at the contact points than the light one. In addition, cast iron conducts heat about three times as well as typical stainless steel (roughly 50 against 15 watts per metre and kelvin), so heat spreads through the bar more quickly.

The downside follows from the same calculation. Four times the mass needs four times the energy to heat up, and it holds the heat correspondingly longer after grilling. The manufacturer gives no figure in minutes for how long it takes to heat through.

On branding, the manufacturer writes that the grate gives the meat “das typische Branding” (the typical branding). The Amazon text goes further and claims that branding is only possible with a cast grate. We regard that as advertising. A thin, hot stainless steel rod also leaves marks, just narrower ones. Wide, heavy bars sear broader stripes, because they have more contact area and stay hotter when the food goes on. With this grate there is the added pattern: the food rests on a diamond grid, so you get a diamond pattern rather than parallel stripes.

The enamel is a fused glass layer. As long as it is intact, no moisture reaches the iron. Glass is brittle, however; a knock against a stone slab or a hard scratch can chip pieces out, and bare cast iron is then exposed there.

Will the grate fit my Weber kettle grill?

For a 47 cm kettle, the manufacturer says yes. It writes that its round cast grates fit “auch in 47/57er Kugelgrills ( auch Weber! )” (also in 47/57 cm kettle grills, including Weber). There is no list of specific grill models. The promise applies in general to the kettle size, regardless of brand.

Why the 45 cm grate is smaller than the kettle follows from the shape. The 47 cm refers to the kettle at the upper rim. The grate sits somewhat lower on supports, and because a kettle narrows towards the bottom, there is less room there. At 45 cm, that leaves, by calculation, 1 cm all round relative to the nominal size.

Whether that is enough for your grill depends on the position of the supports, not on the number on the rating plate. Before ordering, we would measure the old grate from edge to edge. If it measures around 45 cm, the replacement is very likely to fit. If your kettle is 57 cm, you need the larger variant of the same item.

Besides kettle grills, the manufacturer names “viele Grillkamine” (many grill chimneys) as a use, again without model details. The product page makes no mention of gas grills, and a round grate would not fit the rectangular combustion chamber of most gas grills anyway.

Cleaning and storage: what is documented and what we advise

We found no instructions, data sheet or even a single care sentence for this grate from the manufacturer, including on the dishwasher, seasoning or chipping. What follows is therefore our advice and not its specification.

As a general rule for enamelled cast iron: avoid rapid temperature swings. Cold water on a hot grate can create stresses between the glass and the iron. Let it cool down before you wet it.

For baked-on residue, we would burn it off for a few minutes with the lid closed and then brush the warm grate. A brass-bristle brush is the more careful choice here, because brass is softer than enamel, whereas hard steel wire is not necessarily. We would not put the grate in the dishwasher: long exposure to wetness and harsh cleaners attack any small chipped spot. How to loosen stubborn crust gently is covered in the guide Cleaning a burnt-on grill grate.

We would store it dry, so not in an open kettle outdoors. If you find a spot of bare iron, treat it like bare cast iron; the procedure is in the guide Grill is rusting, what to do.

What the manufacturer does not state

For this grate, the following are missing in all the sources we could check: place of manufacture (the shop advertises stainless steel grates from Germany, but this is not documented for the cast grate), the thickness of the round grate, bar width, bar spacing and size of the openings, type and layer thickness of the enamel, the maximum temperature load, all care and cleaning instructions, an instruction manual, a warranty policy, spare parts availability beyond the current listing, a list of compatible kettle grills with model numbers, suitability for gas grills, whether the grate is split, foldable or built with a refuelling opening, the year of market launch, and any scope of delivery beyond the grate. Where we say something about these points above anyway, it is derived from the photo, the material or the geometry and marked as such.

These three alternatives are worth a look

The prices come from our price boxes and change. The ratings are our editorial assessment based on the data comparison and compare products that belong in different grills; they do not produce a ranking for your kettle.

When to choose this grate, and when another

The grill the part is meant for comes first. For a 47 cm kettle grill, this grate is the only one in our table that belongs in the kettle; for a 57 cm one, you take the manufacturer’s larger variant. The rating plays no role in this question, because a grate that does not fit the kettle is worth nothing to you.

If you have a Weber Spirit, the Weber GBS grill grate Spirit 300 is the counterpart. It is also made of enamelled cast iron, but costs approx. €118 instead of approx. €50 and fits no kettle grill. The premium you pay is for the original part with a GBS opening.

If you grill over a fire pit on a tripod, a kettle grate will not help you. The Petromax hanging grate costs approx. €40, this grate approx. €50, and it hangs from three chains. It does not belong in a kettle grill, but then you need no kettle for it.

If you want the diamond marks mainly in winter in the kitchen, the Lodge L8GP3 at approx. €49 is the better purchase. At 26 cm, though, it is a pan for two steaks and no replacement for a 45 cm grate.

Our assessment of the Grillrostprofi itself: if your original grate has rusted through or warped and you grill steaks, chops and burgers directly over the embers, we would choose it over a new wire or chrome grate, because the mass cushions the temperature drop when food goes on. If weight and small food items matter more to you, look at the lighter stainless steel grate from the same brand. And if you are still wondering whether a new grill is due rather than a replacement part, the Grill finder narrows down the options.

Who is it suitable for?

The grate suits you well if you mainly use your kettle grill for short, hot sessions with direct heat: charcoal in, grate on, grill, done.

It gets difficult on long sessions with briquettes, where you have to add fuel after an hour or two. A one-piece grate without a flap or cut-out has to come out completely for that, and hot, at 3.7 kg and without a handle. Because cast iron holds heat for a long time, it stays dangerously hot even away from the embers. We would not do this without a grate lifter and gloves rated for contact heat, and where you set the grate down in the meantime needs to be settled beforehand: not on grass, wooden decking or plastic.

Anyone who regularly cooks low and slow in a kettle grill and tops up fuel while doing so is therefore poorly served by this grate. A grate that opens at the side is worth it for that, and the Grillrostprofi photo shows nothing of the kind.