In a workshop, should I take a metal tool chest or a rotomoulded plastic case?

Answer: Check for salt spray and sunlight first. A dry indoor bay favours the metal tool chest, at 25 kg drawer load and 47 yuan a year. Coastal or washdown areas favour rotomoulded plastic, which never rusts but chalks within three years.

Timber costs half as much, so why does the ten-year sum rank it worst?

Answer: Because replacements count. A 150 yuan crate is swapped every four years, 2.5 times a decade, and totals 625 yuan with patching, about 30 percent above the steel figure.

Stainless carries the most load, so why is it rare on a shop floor?

Answer: Price, at 980 yuan, is the first barrier; repair is the second, since a hinge swap means cutting and re-passivating a weld, which a general fitter cannot do.

What does a 25 kg drawer rating hold in service?

Answer: Treat dynamic load as 60 percent of static and keep contents under 15 kg, roughly a 24-piece socket set plus two wrenches. Beyond that the raceway dents and the drawer jams.

Does the ten-year model hold at other sizes?

Answer: The ranking holds, the figures move. Above 5000 units a year, mould amortisation drops plastic below steel.

Metal Tool Chest vs Alternatives: Where the Real Differences Sit

Quick answer: A metal tool chest comparison fails when it stops at the purchase price. At 52 L, a steel chest weighs 9.5 kg, carries 25 kg per drawer and costs 470 yuan over ten years, a quarter below a timber crate and half of stainless. Rotomoulded plastic never rusts but chalks within three years.

Why a Metal Tool Chest Comparison Needs Fixed Criteria
Weight and Load: What Each Litre Weighs
Corrosion and Service Life: Turning Salt Spray Hours into Years
Cost and Repair: The Ten-Year Ownership Sum
When a Different Box Is the Better Choice
FAQ

1. Why a Metal Tool Chest Comparison Needs Fixed Criteria

Four box types side by side invite a price-only reading, which tells you nothing: each fails differently. A metal tool chest rusts once the coating is cut, plastic fails on ultraviolet light, timber on moisture, stainless on weld quality and cost.

Fix six criteria first: dead weight, drawer static load, salt spray hours, unit price, repair time, service life. The first four come off a quotation; the last two need three years of records.

Criterion	Metal tool chest	Rotomoulded plastic	Timber crate	Stainless cabinet
Dead weight at 52 L	9.5 kg	7.2 kg	11.0 kg	21.5 kg
Drawer static load	25 kg	12 kg	none	40 kg
Neutral salt spray	rust at 240 h	chalks	mould at 72 h	clean at 720 h
Unit price	320 yuan	480 yuan	150 yuan	980 yuan

Plastic costing more than steel is no typo: rotomould tooling costs more per unit than stamped sheet. All figures use one 560 by 330 by 290 mm envelope.

2. Weight and Load: What Each Litre Weighs

Per litre: steel 0.18 kg, plastic 0.14, timber 0.21, stainless 0.41. Carried eight times a day, the 2.3 kg gap becomes fatigue by mid-shift. Slides are rated 25 kg static and 15 kg dynamic; stacked four high, mid-panel deflection must stay under 1.5 mm before the coating cracks. Plastic deflects more because LLDPE sits far below steel in modulus, so it needs ribs or fewer tiers.

3. Corrosion and Service Life: Turning Salt Spray Hours into Years

Salt spray hours convert, they are not service life: 240 hours maps to eight to twelve years indoors, 480 to sixteen, but only while the film is intact. Timber's 72 hours is mould: above 18 percent moisture the nails loosen, so a humid-site crate lasts four years. Plastic never rusts, but 1000 hours of xenon-arc ageing equals three years outdoors, after which it chalks and loses 30 percent impact strength.

4. Cost and Repair: The Ten-Year Ownership Sum

Replacement count is the term usually left out: a 150 yuan crate looks cheapest until it is swapped 2.5 times and patched each season. Steel is bought once and repaired at the hinge, latch and paint.

Item	Metal tool chest	Rotomoulded plastic	Timber crate	Stainless cabinet
Unit price	320 yuan	480 yuan	150 yuan	980 yuan
Replacements in 10 years	1	1	2.5	1
Ten-year total	470 yuan	520 yuan	625 yuan	1040 yuan
Annualised	47 yuan	52 yuan	62 yuan	104 yuan

Steel runs a quarter cheaper a year than timber and less than half of stainless, while plastic costs 5 yuan a year more.

5. When a Different Box Is the Better Choice

Coastal sites are the exception: 240 hours of protection will not survive two rainy seasons, so plastic or stainless is safer. For air freight, 2.3 kg less per chest takes 92 kg off a 40-unit pallet. For one-way export, timber wins on price, but ISPM 15 needs 56 °C for 30 minutes and an unmarked crate is refused at the border.

Conclusion

The four box types differ less in price than in how they fail and how they are repaired. A metal tool chest trades 9.5 kg of dead weight for a 25 kg drawer rating and hinge-level repairs, landing at 47 yuan a year, which makes it the default for an indoor bay. Writing the service environment into the specification saves more than squeezing the unit price, and that is why the metal tool chest outnumbers the rest on most shop floors.

This article discusses only the container (case body) side of specifications and design intent, and does not cover any handling, loading or use of the contents.