Ferrochrome buying collapses into failure fast when spec sheets chase price instead of chemistry: a charge-chrome cargo shipped at Cr:Fe 1.5 is rejected on receipt, a "low-silica" metallurgical lot that hides 8% SiO2 triggers a price penalty, and a refractory cargo priced off Cr2O3 alone misses that the buyer actually values Al2O3 [S2].
The global ferrochromium market is valued at roughly $15 billion with a 3-5% CAGR through 2028, and stainless steel absorbs over 80% of FeCr output, with automotive, aerospace, and energy taking most of the balance [S3]. South Africa runs ~40-45% of global chromite mine production, followed by Kazakhstan, Turkey, India, Finland, and Pakistan, with global mine output in the 40-45 Mt/yr band [S2].
Five Numbers That Price Chromite (and FeCr Feedstock)
Cr2O3 is the headline but never the whole story on a ferrochrome feedstock assay: smelters, refractory makers, foundries, and dichromate plants each weight different fields [S2]. Commercial Cr2O3 runs 36-52%, split as metallurgical 42-48%, refractory 38-42%, foundry 46%+, and chemical 44-46%.
The Cr:Fe ratio is the metallurgical-grade kill switch: charge chrome (low-grade FeCr for stainless) accepts ≥ 1.6, high-carbon ferrochrome typically needs ≥ 2.0, and specialty alloys reach for ≥ 2.5, with Waziristan ore frequently clearing 2.5 [S2]. SiO2 is a near-universal penalty: each point of silica drags effective Cr2O3 down via the "effective Cr2O3 = Cr2O3 − 2.5 × SiO2" calc, and chemical-grade buyers demand SiO2 < 1%. Al2O3 flips sign by application (a value-add in refractory, a penalty elsewhere), and moisture caps are routinely ignored until a 2% overrun starts the demurrage clock.
Grade-by-Grade Specification Bands
Metallurgical chromite is where ~85-90% of global chromite demand lands, consumed as ferrochrome for stainless steel per the ICDA multi-year average [S2]. Standard metallurgical spec: Cr2O3 42-48%, Cr:Fe ≥ 2.0 (≥ 2.5 for premium charge), SiO2 < 6%, lumpy 10-150 mm or sized concentrate; the seaborne benchmark is the Fastmarkets MB UG2 Chrome Ore Concentrate 42% Cr2O3 CIF China index after the European Charge Chrome Benchmark was discontinued in June 2024.
Refractory chromite inverts the value function: high Al2O3 becomes positive (thermal-shock resistance), low SiO2 matters as much as Cr2O3, with a typical spec of Cr2O3 38-42%, Al2O3 > 14%, SiO2 < 4%, FeO in a narrow band [S2]. Foundry chromite sand for precision casting buys on grain shape (AFS number) as much as chemistry, while chemical-grade chromite for dichromate plants wants Cr2O3 44-46% with SiO2 < 1% to keep the soda-ash roast clean.
Carbon Grade, Form, and What It Means for Stainless Melt Shops
Ferrochrome splits into three carbon buckets that drive EAF and AOD decisions, and listing prices on B2B platforms in 2026 span that range end-to-end [S3]. High-carbon FeCr (HC FeCr) carries 6-8% C and is the workhorse charge for 300-series stainless, with bulk offers on multi-thousand-tonne terms in the $260-380/t band ex-works and mid-tier Chinese offers near $900-1,100/t on 25-tonne minimums.
Medium-carbon FeCr (MC FeCr, ~1-4% C) and low-carbon FeCr (LC FeCr, < 0.5% C, often 0.05-0.10%) target 304L/316L austenitic and ferritic stainless where carbon must stay below spec to avoid sensitization; LC FeCr routinely lists at $2,000-2,900/t on 1-25 tonne MOQs, with the 57-65% Cr LC grade at $0.50-5/kg for spot kilo-lots [S3]. FeCr nitride and high-nitrogen variants (Cr-N FeCr) sit in the $2.80-3.50/kg band for foundries needing nitrogen pick-up without argon-oxygen decarburization overhead.
Supplier Map and Sourcing Channels
Ten producers dominate the global FeCr landscape, mixing integrated miners with downstream smelters and merchant traders, with sustainability metrics now a board-level procurement criterion per a 2025 competitive analysis [S1]. Vertically integrated players run captive chromite mines plus submerged-arc furnaces, merchant smelters in China, India, and Russia buy lumpy or concentrate on spot, and trading houses (Helvetia, Glencore, Traxys, and a long tail of regional desks) sit between origin and stainless melt shops.
On B2B platforms as of 2026-09-07, Chinese exporters lead offer volume: Hainan Flag Mountain, Hebei Minmetals, Hebei Xuhui, Tianjin Chengmai, and Chengdu Huarui all list LC/HC FeCr in the $2,000-2,900/t range with MOQs from 1 tonne up; South African UMGS GROUP PTY LTD posts HC FeCr at $260-380/t but with a 1,000-tonne minimum that excludes spot buyers [S3]. For mining-tied spec work, see best thickness gauges for mining: spec-first selection map for the inspection side of incoming ore cargoes.
Contract Mechanics: Index Pricing, Moisture, and Silica Caps
European and US stainless mills moved to index-linked FeCr pricing after the quarterly European Charge Chrome Benchmark was discontinued in June 2024, with the Fastmarkets MB UG2 CIF China 42% Cr2O3 index as the reference for chromite feedstock [S2]. Effective-Cr2O3 calculations now show up in most long-term offtake contracts, and the "effective Cr2O3 = Cr2O3 − 2.5 × SiO2" rule is the most common penalty formula in metallurgical tenders.
Moisture caps belong in the contract, not the side letter: a 2% moisture overrun on a 30,000-tonne cargo is a 600-tonne water bill the buyer pays while demurrage ticks at the discharge berth [S2]. For adjacent process-engineering spec work in heavy industry, see industrial refrigeration procurement: a spec-first buyer's map for 2026 for utility-side capex decisions that often co-time with furnace overhauls. Sizing, lump-fraction, and FeO control clauses round out the contract, with AFS grain-shape specs added for foundry-grade split-offs.
Selection Criteria and Common Failure Modes
FeCr is "for" stainless melt shops (300/400 series), tool-steel and high-speed-steel producers needing vanadium- and nitrogen-bearing variants, and specialty alloy plants pushing Cr:Fe ≥ 2.5 [S3]. It is "not for" buyers who can't take container-lot or 25-tonne minimums when supplier MOQs are pinned at 1,000 tonnes (e.g. UMGS bulk HC FeCr), nor for chemical buyers treating metallurgical lots as if they were chemical-grade.
Three failure modes recur in 2025-2026 contracts: (1) Cr:Fe below charge-chrome minimum triggers smelter rejection, (2) high SiO2 or alumina skews the effective-Cr2O3 calc and inflates unit cost, (3) moisture cap gaps let demurrage spiral at discharge [S2]. On the equipment side, sand-blasting of cast stainless rolls back into the foundry-grade chromite sand spec; the spec-first map in how to choose a sand blasting machine: 2026 spec map is a useful adjacent read for foundry procurement teams.
Trackable signals for the next procurement cycle: Fastmarkets MB UG2 42% CIF China index movements, the next ICDA statistical bulletin update, and any restart or curtailment announcements from South African and Kazakh integrated producers [S1][S2].
Spec-level background on the components involved: linear guide, crossed roller guide, and pressure transmitter.