Tool Steel Scrap Specification — Die Blocks, Mould Tooling and Alloy Tool Steel Arisings

Tool steel is alloy steel formulated for hardness, wear resistance, toughness or hot strength in tooling service. In the secondary market it is bought for its alloy content — chromium, molybdenum, vanadium, tungsten and nickel in varying proportions — and for the fact that large sections of it arrive in clean, single-piece, single-grade form, which is rare in scrap.

The material comes from press shops and forging plants replacing worn dies, plastics processors decommissioning moulds, stamping operations retiring punches and die sets, tool rooms clearing obsolete tooling, and machine shops generating bar ends and offcuts from tool steel stock.

Chemistry is grade-dependent. This page does not state a guaranteed composition: alloy family, element ranges and any deleterious-element limits must be confirmed for the specific lot by material identification, XRF or OES analysis, mill certificates where available, or an agreed inspection before shipment.

Material is offered in one or more of the presentations below; where a lot spans several of them, each form is packed and described as its own fraction.

The families below are how the market groups tool steels. Family placement is the working level of description; a specific designation requires documentation or laboratory analysis.

Tool steels are magnetic, visually indistinguishable from one another and from many engineering steels, and almost never usefully marked once tooling has been in service. Identification therefore leans on three things: any surviving stamping, engraving or die-shop records; the origin process, which narrows the likely family considerably; and instrument screening on a ground clean surface.

XRF reads chromium, molybdenum, vanadium, tungsten and nickel well, which places a piece in a family. It does not read carbon usefully, and carbon is precisely what separates several tool steel grades that share an alloy signature. Optical emission spectroscopy is the method that resolves that, and it is a laboratory or portable-OES exercise rather than a handheld one.

In practice, a die shop that knows what grade its blocks were bought as gives a far better description than any amount of yard testing. Where that knowledge exists it should travel with the lot.

Size is the defining practical problem in this stream. A forging die block or a large mould base can exceed what a receiving yard's handling equipment, a container floor or a shredder feed can take. Maximum piece dimensions and weight should be agreed before the material is offered rather than discovered on arrival.

Where cutting is required, the method and the resulting piece size are agreed in advance. Cutting is labour and consumable cost, so it is specified where the destination genuinely needs it and skipped where the material can be handled as it is.

Mould tooling additionally requires stripping. Injection moulds carry copper cooling inserts, beryllium-copper elements in some designs, hydraulic and pneumatic fittings, hoses, bushings, guide pins, springs, heaters, thermocouples and electrical wiring, all of which have to come out before the steel is a clean tool steel offer.

The items below are what typically reduces the recoverable value of a lot or, at the end of the list, keeps it out of the stream altogether.

A complete offer states the family or grade and its basis, the number and approximate weight of the largest pieces, whether cutting has been done or is required, the stripping status of mould tooling, the presence of any non-ferrous inserts, the split between solids and turnings, and the destination.

Grade guarantees, chemistry windows and any acceptance criteria belong in the sales contract with the sampling and analysis method attached. Family-level identification and origin knowledge are description, not specification.

Screening places tool steel in a family by reading its alloying elements on a prepared surface, and it detects non-ferrous inserts and foreign tooling in a lot. That is the routine use of instruments in this stream and it is done before packing.

Carbon content, which separates several tool steel grades sharing a similar alloy signature, is not readable by handheld XRF. Optical emission spectroscopy or laboratory analysis on an agreed sample is what establishes a grade-level figure, and where the buyer's route depends on it the method belongs in the contract.

Customs classification for alloy tool steel scrap depends on the actual composition and physical form of the goods, on whether the material is solid scrap, turnings, powder or residue, on the destination country and on how the competent authority in that jurisdiction interprets the material description.

Mixed-grade and mixed-family lots can create additional classification complexity, because the description of the goods on the invoice and packing list must reflect what is actually shipped rather than the best fraction in the load.

Nautica does not assign a definitive tariff code in advance for this stream. Buyers and importers should confirm the applicable classification, duty treatment and any import licensing or waste-shipment obligation with their own customs broker or the competent customs authority for the destination before contracting.