What ISRI codes are and why they matter
ISRI Specifications Circular standardises trade names and minimum quality clauses for over 200 scrap grades. A contract that says 'ISRI Barley' or 'ISRI Talc' carries a specific, enforceable quality definition that buyer and seller, in any country, can reference identically. ISRI codes are the lingua franca of global scrap trade and a prerequisite for clean pre-shipment inspection, LC documentation and any quality dispute resolution.
Copper grades
Barley — bare bright copper wire 99.95% Cu, ≥1/16 inch, free of burnt brittle wire and tinned/lacquered material. Berry — clean unalloyed copper wire under 1/16 inch. Candy — Berry equivalent for No.1 clippings. Birch — No.1 heavy copper 96% Cu. Cliff — No.2 mixed copper 94% Cu. Dream — heavy insulated copper wire. Druid — No.2 insulated copper wire mixed insulation. Each Nautica copper contract names the code verbatim.
Aluminium grades
Talc — old aluminium can scrap, baled to minimum 14 lbs/cu ft, from used beverage cans only. Taldon — loose UBC. Taint — mixed low-copper clean aluminium, 1% Cu max. Tabor — same family, 3% Cu max. Tense — clean mixed old aluminium. Troma — clean aluminium wheels free of valves, weights, plastic. Tata/Tutu — aluminium extrusion 6063 family. Telic — aluminium turnings. Tutu — clean 6063 extrusion off-cuts.
Stainless steel grades
Stainless 18-8 — minimum 7% Ni and 16% Cr (industry term: 304). 18-10-2 Mo — adds 2% Mo (industry term: 316). Stainless Turnings 18-8 / 18-10-2 Mo — dry oil-free machining turnings. Stainless Solids 309/310/321/410 — specialty grades from European mill arisings, traded under named chemistry rather than a generic code.
Ferrous (HMS) grades
ISRI 200/201 — HMS No.1 heavy melting steel ≥¼ inch thick, dimensions ≤60×24 inch. ISRI 205/206 — HMS No.2 ≥⅛ inch, includes auto body. ISRI 211 — Shredded steel, magnetic, 70%+ density. ISRI 230 (P&S) — Plate and Structural ≥12 mm, premium grade. The global benchmark blend is 'HMS 1&2 80:20' — 80% HMS 1 + 20% HMS 2 by weight.
Brass grades
Honey — clean yellow brass solids, free of nickel/iron. Ocean — yellow brass turnings. Pales — clean brass shells, no primers. Lake — brass pipe, plumbing fixtures. Each brass Nautica contract names the ISRI code and adds a tolerance clause on copper-zinc ratio and lead content.
Lead, zinc and nickel
Lead: Rains (clean lead), Racks (battery plates). Zinc: Saves (clean zinc die-cast), Scope (galvanised zinc dross). Nickel: pure nickel scrap typically traded by chemistry rather than ISRI code because of the small number of specialised buyers.
Why ISRI alone is not enough
ISRI codes define minimum quality but most contracts add destination-specific tolerance clauses: maximum moisture, oil, fines percentage, foreign attachment limits, and recovery test methodology for insulated wire and dross. Nautica contracts always include both the ISRI clause and the bespoke tolerance language — so the buyer's discharge-port inspection has a clear test to apply.
How ISRI links to LME pricing
ISRI codes anchor the grade; LME 3M anchors the price. Discount = LME 3M minus a grade-specific band. For copper: Barley −$250–$450, Berry −$350–$550, Birch −$500–$700, Cliff −$600–$800. For aluminium: Talc UBC −$250–$450, Tata/Tutu 6063 −$300–$500, Troma −$300–$500, Telic turnings −$500–$900.
Use this guide in your procurement
Any time you request a quote from Nautica or any supplier, reference the ISRI code in your RFQ. This eliminates 90% of specification disputes before the contract is signed. Nautica is happy to walk new buyers through the ISRI vocabulary on a 30-minute call — send a contact request and we will schedule.