Beyond Tungsten: Why Tool Steel & Polyurethane Are the Smarter Plays
Tungsten carbide powder surged from ~311 yuan/kg in late 2024 to over 2,300 yuan/kg by March 2026 — a +625% year-on-year explosion. Four structural forces are driving the surge, and the market will never return to pre-2025 levels. For secondary cleaners, tool steel now wins on cost-per-month. For primary positions, polyurethane — recommended by CEMA for belts with mechanical fasteners — is the safer, technically superior alternative.
The Four Forces Behind the +625% Surge
1. China Tightened the Tap — Drastically
China controls roughly 82% of global tungsten mine production. In early 2025, Beijing cut mining quotas by approximately 6.5% year-on-year, with Jiangxi and Hunan provinces seeing 8–10% reductions. In February 2025, tungsten compounds were added to China's export control list. By early 2026, Chinese exports had dropped by roughly 40%.
2. Ore Quality Is Collapsing
The average grade of Chinese tungsten ore has fallen from 0.42% in 2004 to 0.28% in 2024. Producing one tonne of concentrate now requires 300–400 tonnes of raw ore. Mining costs have exceeded 100,000 yuan per tonne. This decline is permanent.
3. Demand From Every Direction
Photovoltaic tungsten wire penetration soared from 15% in 2023 to over 60% by 2025, adding annual demand exceeding 4,500 tonnes. Defence, EVs, and semiconductors add relentless structural pressure on top. CICC forecasts a supply-demand gap greater than 17% through 2028 — a structural deficit, not a cyclical one.
4. Export Control Cascade and Rotterdam APT Shock
In January 2026, China imposed dual-use item controls on tungsten compounds. The Rotterdam APT benchmark rose from under $400/MTU to over $2,200. BMO Capital Markets noted: "I have never seen a market as tight as tungsten is right now." Carbide blade prices have approximately doubled versus pre-2025 levels.
Post-March 2026 update: By mid-April 2026, carbide powder corrected modestly to approximately 2,160 yuan/kg — a 7.5% decline from the March peak but still over 105% year-to-date. The structural deficit remains firmly in place.
Secondary Cleaners: Why Tool Steel (FM8 Inline, 4mm, 60 HRC) Is the Smarter Play
At the secondary position — flat belt, lower impact — tool steel (AISI D2, 60 HRC) is hard enough to resist abrasion but compliant enough to avoid belt damage. NIOSH explicitly notes that harder carbide materials carry "potential for damaging the belting" and are incompatible with mechanical splices. FM8 Inline Tool Steel blades are 4mm thick — over 20% thicker than typical competitor tool steel blades at 3–3.2mm — maintaining edge geometry and dissipating interface heat throughout the service life.
FRAS Certification (AS/NZS 4606 & TRG 3608): Both FM8 Inline Tool Steel blades and FM8 Tungsten Carbide secondary blades are independently certified FRAS-rated for underground coal operations. No separate holder or backing required — compliance is built into the blade specification.
| Factor | FM8 Tungsten Carbide Secondary | FM8 Inline Tool Steel (4mm, 60 HRC) |
|---|---|---|
| Raw material price trend | +625% YoY; structural deficit | Stable (alloy steel markets) |
| Blade price increase (2025–26) | Approx. 2× pre-2025 pricing | Minimal increase |
| Hardness vs belt cover | ~90 HRA (~80+ HRC) — extreme differential | 60 HRC — optimal differential window |
| Belt damage risk | Elevated — potential gouging on splice impact | Managed — predictable abrasive wear |
| FRAS certification (AS4606/TRG3608) | ✓ Built-in FRAS compliance | ✓ Built-in FRAS compliance |
| Typical competitor thickness | 3mm or less | 4mm (20%+ thicker) |
| Cost-per-month (2026) | Approx. 2× pre-2025 pricing | Near pre-2025 pricing |
Primary Cleaners: Why Polyurethane Should Be Considered Very Carefully
CEMA recommends against rigid cleaning blades on belts with mechanical fasteners. FM8 Super XHD Yellow (92–94A Shore) delivers the optimal blade-to-belt hardness differential of +20 to +35A as defined by the Archard wear law. Bowen Basin field trials documented R²=0.89 linear wear regression — predictable, schedulable performance. With carbide prices now approximately double pre-2025 levels, the economic case for polyurethane at the primary position has strengthened significantly.
Engineering principle: The optimal hardness differential for belt cleaning is +20 to +35A (blade minus belt cover). Below +10A, carryback increases; above +35A, brittleness and splice interaction risks rise. FM8 Super XHD Yellow (92–94A nominal) stays in the sweet spot across the entire belt lifecycle — from new covers (60A) to aged covers (75A). Carbide's excess of +50A differential requires careful application engineering at every conveyor.
What Procurement and Maintenance Teams Must Do Now
- Audit your secondary cleaner material. Evaluate FM8 Inline Tool Steel (60 HRC, 4mm) via FM8's Verified Validation Program.
- Re-evaluate your primary cleaner specification. For belts with mechanical fasteners, consider polyurethane as recommended by CEMA.
- Lock in tool steel supply agreements while pricing remains decoupled from tungsten markets.
- Recalculate your TCO. With carbide blades now costing approximately 2× pre-2025 levels, the cost-per-cleaned-tonne equation has shifted significantly in favour of alternatives.
The tungsten squeeze is real, permanent, and driven by declining ore grades, Chinese export controls, and surging defence and clean-tech demand. FM8 Inline Tool Steel (4mm, 60 HRC, D2, FRAS certified) and FM8 Super XHD Yellow (92–94A polyurethane) offer stable pricing, superior belt protection, and engineering logic aligned with CEMA recommendations.
Start a Side-by-Side Trial
Our Verified Validation Program puts FM8 tool steel or polyurethane blades to work in your operating environment — with agreed metrics and a meet-or-exceed guarantee. No invoice until performance is proven.
Talk to FM8 Engineering →→ Why Your Cleaning Blade Was Designed for a Belt That No Longer Exists
References & endnotes
• China Tungsten Online, March–April 2026: carbide powder +625% YoY; April 2026 ~2,160 yuan/kg.
• JAT Carbide (Dec 2025): mining quotas cut 6.45%; ore grade 0.28%.
• Streetwise Reports / BMO (March 2026): Rotterdam APT >$2,200/MTU.
• CDC/NIOSH: harder blade materials carry "potential for damaging the belting."
• CEMA recommendations on rigid cleaners with mechanical fasteners.
• FM8 "Blade-to-Belt Hardness Differential" (April 2026): optimal differential +20 to +35A; R²=0.89.
• CICC forecast: 17%+ supply-demand gap through 2028.