This single URL answers the same intent cluster for arc magnet high temperature smco magnet. You get a tool-first screening result in seconds, then a source-backed report layer that explains temperature boundaries, demagnetization risk, supply tradeoffs, and what to do next.
Mobile tip: swipe horizontally if columns are truncated.
| Metric | Screening guide | Source basis |
|---|---|---|
| Operating temperature for high-temperature SmCo arc magnets | <=300 C preferred, 301-350 C conditional, >350 C redesign gate | Stage-1 routing based on public SmCo grade tables and supplier datasheets. Final release must use lot-level B-H curves at operating temperature. |
| Opposing demagnetizing field vs coercivity margin | <=1500 Oe preferred, 1501-2200 Oe conditional, >2200 Oe reject | Heuristic boundary for fast screening only. Geometry, load line, and measurement method can shift usable margins. |
| L/D ratio (arc length to effective diameter) | >=1.7 preferred, 1.1-1.69 conditional, <1.1 high risk | Lower L/D can increase self-demagnetization sensitivity and assembly risk. Verify with EM model and measured back-EMF where needed. |
| Lead time for machined SmCo arc segments | >=10 weeks preferred, 8-9 conditional, <8 high risk | Used as procurement realism gate for custom geometry and lot-level QC. Not a universal market benchmark. |
1) Keyword intent is still tool-first and RFQ-first
The current live query pattern is still dominated by supplier/RFQ flows, so this route keeps tool execution and action routing above long-form reading.
Evidence: E1
2) High-temperature SmCo claims need explicit boundary markers
Supplier tables alone are not enough; DOE and NIST anchors were added so the page separates SmCo/NdFeB thermal boundaries from coefficient-only reasoning.
Evidence: E2, E3, E4, E5, E6
3) Method-aware evidence is mandatory for supplier comparison
IEC 60404-8-1 / 60404-5 plus the newer IEC 60404-18 and ASTM context show why grade labels alone are not enough for substitution decisions.
Evidence: E7, E8, E9
4) Technical pass still needs sourcing and logistics gates
USGS/IEA concentration signals, CRMA diversification benchmarks, REACH article-level obligations, and FAA/49 CFR shipment thresholds require explicit go/no-go controls after checker output.
Evidence: E10, E11, E12, E13, E15 (E14 pending confirmation)
SmCo max operating rows shown
up to 350 C
Public RECOMA grade rows include operating-temperature entries up to 350 C.
Source: S2
NdFeB practical high-energy window (DOE framing)
about <=180 C
DOE deep-dive uses this as a practical NdFeB high-energy boundary in its supply-chain framing.
Source: S6
U.S. REE import reliance (2025)
67%
USGS reports 2025 net import reliance for compounds/metals at 67%.
Source: S11
U.S. REE import growth (2025 vs 2024)
+169%
USGS reports strong annual import-volume increase for rare-earth compounds and metals.
Source: S11
Sintered magnet concentration (2024)
94%
IEA REE summary reports very high concentration in sintered permanent magnet production.
Source: S12
CRMA single-country dependency benchmark
<=65%
EU CRMA benchmark for each strategic raw material at relevant processing stages.
Source: S13/S14
Air-shipment magnetic threshold
0.00525 gauss @ 4.5 m
FAA and 49 CFR use this as the aircraft-carriage boundary for package magnetic field.
Source: S18/S19
SVHC Candidate List count
Reported 253 (pending confirmation)
Search-cached ECHA snapshot shows 253 entries after February 2026 update, but direct crawl was blocked in this run.
Source: S17
Mobile tip: swipe horizontally if columns are truncated.
| Audience type | Fit statement | Boundary rationale |
|---|---|---|
| Most suitable for | Teams screening high-temperature SmCo arc magnet feasibility before RFQ lock | You need rapid thermal/demag routing plus actionable next-step guidance on one URL. |
| Also suitable for | Programs comparing SmCo with high-temperature NdFeB fallback paths | You need method-aware comparison and risk boundaries instead of price-only ranking. |
| Not suitable for | Final design release or PPAP-equivalent technical signoff | This page does not replace full electromagnetic, thermal, mechanical, and validation workflows. |
| Not suitable for | Cross-supplier substitution without test-method parity | Equivalent grade labels can hide material-behavior differences at high temperature. |
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| Severity | Gap found | Stage1b fix | Status |
|---|---|---|---|
| High | Several thermal conclusions depended too heavily on supplier material without an independent SmCo vs NdFeB high-temperature baseline. | Added DOE supply-chain deep-dive and NIST metrology evidence to anchor the high-temperature comparison boundary before procurement decisions. | Closed |
| High | Method-boundary evidence did not include the latest open-circuit permanent-magnet measurement standard. | Added IEC 60404-18:2025 alongside IEC 60404-8-1 / 60404-5 and tied it to method-parity gates in comparison and risk sections. | Closed |
| Medium | EU compliance guidance referenced obligations broadly but lacked article-level threshold and trigger context. | Bound the compliance section to REACH Article 33 / Article 7(2) style triggers (>0.1% w/w in articles) with action ownership in RFQ gates. | Closed |
| Medium | Supply-resilience recommendations lacked a policy benchmark that procurement teams can operationalize. | Added CRMA 2030 benchmark references (10/40/25 and <=65% single-third-country dependency) and translated them into dual-source controls. | Closed |
| Medium | Candidate List live count cannot be fetched directly in this run due ECHA anti-bot gating. | Kept the reported February 4, 2026 count as an explicit "pending confirmation" item and blocked it from becoming a hard release threshold. | Partially closed |
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| ID | New fact | Date | Decision impact | Source |
|---|---|---|---|---|
| E1 | A May 25, 2026 SERP sample for "arc magnet high temperature smco magnet" remains supplier/RFQ-heavy, not glossary-heavy. | Brave query sample, May 25, 2026 | Confirms that tool-first execution should stay above deep report text on this canonical route. | S1 |
| E2 | Arnold RECOMA public grade rows include max operating temperatures up to 350 C and show reversible Br coefficients in roughly -0.035 to -0.050 %/K ranges for listed grades. | Arnold page accessed May 25, 2026 | Supports explicit 300 C / 350 C screening breakpoints and prevents one-size-fits-all assumptions. | S2 |
| E3 | Electron Energy public SmCo pages and linked datasheets list high-temperature classes (for example 250 C and 300 C) plus ultra-high-temperature product lines. | Electron Energy pages accessed May 25, 2026 | Reinforces that supplier-grade definitions differ and must be verified before substitution. | S3 |
| E4 | DOE rare-earth permanent-magnet deep-dive keeps NdFeB centered around high-energy applications up to about 180 C, while identifying SmCo as the higher-temperature option when weight tradeoffs are acceptable. | DOE report (February 2022), rechecked May 25, 2026 | Adds an independent boundary for when to escalate from high-temperature NdFeB fallback to SmCo route evaluation. | S6 |
| E5 | A NIST-cited metrology paper reports Curie temperature around 800 C for SmCo versus about 310 C for NdFeB and notes SmCo temperature coefficient advantage in the cited setup. | NIST-hosted paper (2016), rechecked May 25, 2026 | Supports the concept-boundary section that separates reversible drift logic from irreversible thermal limits. | S5 |
| E6 | Arnold reversible-temperature-coefficient paper warns these coefficients are approximate and non-linear over broad ranges. | Arnold RTC paper accessed May 25, 2026 | Explains why checker outputs include uncertainty text and cannot be used as final release evidence. | S4 |
| E7 | IEC 60404-8-1 and IEC 60404-5 define property and demagnetization-curve measurement contexts for permanent magnets. | IEC pages accessed May 25, 2026 | Supports the method-comparability gate in comparison and risk sections. | S7/S8 |
| E8 | IEC 60404-18:2025 adds open-circuit magnetic-property measurement detail using superconducting magnet methods and explicitly links method context to intrinsic curve interpretation. | IEC 60404-18 page accessed May 25, 2026 | Prevents cross-supplier data mixing when magnetic-property test setups differ. | S9 |
| E9 | ASTM A977 notes high-coercivity magnet test outputs are method-sensitive and require reporting context. | ASTM page accessed May 25, 2026 | Prevents grade-label-only supplier comparison for high-temperature routing decisions. | S10 |
| E10 | USGS MCS 2026 keeps U.S. rare-earth compounds/metals net import reliance at 67% for 2025 and reports import-volume growth of about 169% year over year. | USGS report published February 2026 | Strengthens dual-source and quote-expiry controls even when technical screening passes. | S11 |
| E11 | IEA Rare Earth Elements (2026) reports concentration remains high across mining, refining, and sintered permanent magnets, including 94% sintered share and 91% refined share in one country for 2024. | IEA report published 2026 (accessed May 25, 2026) | Converts macro concentration into actionable sourcing-resilience checks in this report layer. | S12 |
| E12 | European Commission and CRMA legal text define 2030 benchmarks (10% extraction, 40% processing, 25% recycling) and a <=65% single-third-country dependency target for each strategic raw material. | Regulation and Commission pages rechecked May 25, 2026 | Transforms concentration risk into concrete supplier-diversification gates and re-quote controls for EU-linked programs. | S13/S14 |
| E13 | ECHA article-level guidance keeps >0.1% w/w communication and notification triggers explicit for Candidate List substances in articles. | ECHA guidance snapshots (cached) rechecked May 25, 2026 | Adds a minimum compliance boundary so technical RFQ packs include SVHC communication/notification planning. | S15/S16 |
| E14 | ECHA website snapshots report 253 Candidate List entries after the February 4, 2026 update, but direct crawling is blocked in this run and remains pending confirmation. | Snapshot observed May 2026; direct fetch blocked on May 25, 2026 | Prevents treating live list count as a hard numeric gate without direct legal-pack verification. | S17 |
| E15 | FAA PackSafe and 49 CFR 173.21 keep the aircraft-carriage magnetic-field threshold at >0.00525 gauss measured at 4.5 m from package surface. | FAA and eCFR pages rechecked May 25, 2026 | Adds a logistics blocker path: technical pass can still fail dispatch without gauss-test evidence. | S18/S19 |
Mobile tip: swipe horizontally if columns are truncated.
| Time marker | Signal | Execution risk if ignored | Minimum action | Source |
|---|---|---|---|---|
| 2010 technical baseline | Reversible temperature coefficients are useful but not universally linear prediction tools. | Using one coefficient as a universal predictor can overstate thermal confidence. | Pair coefficient interpretation with lot-level curve and duty-cycle validation. | S4 |
| 2016 thermal-physics anchor | NIST-hosted metrology reference keeps SmCo vs NdFeB thermal-property boundaries explicit in high-temperature contexts. | Teams can over-extend NdFeB fallback windows if they ignore material-level thermal differences. | Use independent thermal-property evidence before deciding SmCo/NdFeB branch. | S5/S6 |
| 2023-2025 standards context | IEC and ASTM references reinforce method-aware interpretation for magnetic property and demag data. | Supplier grade claims may appear equivalent while test methods differ. | Require method-labeled reports before final material substitution decisions. | S7/S8/S9/S10 |
| May 2024 policy baseline | CRMA sets 2030 diversification and capacity benchmarks (10/40/25 and <=65% single-third-country dependency). | Programs can pass technical checks but still fail resilience or policy-screen requirements. | Translate CRMA benchmarks into supplier concentration thresholds and re-quote cadence. | S13/S14 |
| 2024-2026 concentration context | IEA 2026 keeps concentration high across mined/refined/sintered stages and highlights fast-growing magnet demand. | Single-route sourcing can fail under policy or conversion-stage disruptions. | Set dual-source qualification and re-quote gates before PO lock. | S12 |
| 2025 U.S. import posture | USGS reports high rare-earth import reliance with large annual volume movements. | Cost and lead-time assumptions can drift late in the program cycle. | Refresh market/policy checks on a fixed cadence before production commitments. | S11 |
| 2026 compliance data-quality signal | Candidate List count is reported as 253 after February 4, 2026 updates, but direct ECHA crawl is blocked in this run. | Teams may lock RFQ gates on stale or unverifiable counts. | Treat list count as pending confirmation and revalidate against direct legal source before release. | S17 |
| Ongoing transport boundary | Aircraft magnetic-field threshold remains unchanged in FAA and 49 CFR guidance. | Shipment plans can fail if packaging field is not validated early. | Add pre-shipment gauss-test proof and fallback route planning. | S18/S19 |
Mobile tip: swipe horizontally if columns are truncated.
| Material / sourcing path | Traceability depth | Quote execution speed | Compliance control | Concentration resilience | Best-fit scenario | Counterexample / limit |
|---|---|---|---|---|---|---|
| Sm2Co17 high-temperature route | High when lot-level thermal and demag evidence is included in the RFQ packet | Moderate to slow for custom high-temperature arc geometry | Strong when method-labeled magnetic-property evidence is enforced | Thermally robust but still dependent on disciplined sourcing strategy | Programs with sustained hotspots above roughly 250 C and strict demag tolerance. | Can be over-specified for lower-temperature duty where cost/lead-time dominates. |
| SmCo5 route | Medium to high depending on supplier documentation depth | Moderate with fewer extreme-process steps than ultra-high-temp routes | Good if coating, SVHC, and method context are complete | Balanced path but still needs backup-supplier planning | High-temperature programs that do not require the most extreme coercivity envelopes. | Can underperform if opposing field and load-line margins are not validated. |
| High-temperature NdFeB fallback route | High only when lot-level elevated-temperature demag data is explicit | Often faster and cheaper in early quoting cycles | Needs strict thermal-margin and test-method governance to avoid misuse | Potentially weaker at high duty temperatures; sourcing risk still non-trivial | Duty windows mostly <=220 C with proven cooling control and strong cost pressure. | Unsafe substitution when hotspot and opposing-field margins are not revalidated. |
Mobile tip: swipe horizontally if columns are truncated.
| Risk | Trigger | Impact | Mitigation | Evidence |
|---|---|---|---|---|
| Over-trusting one SmCo temperature number from a generic table | Material lock happens without lot-level load-line and test-method evidence | Demag or drift risk appears late in validation or field use | Require lot-level curve data and temperature-specific validation before release. | E2, E3, E4, E5, E6, E7, E8, E9 |
| Treating checker pass as final engineering approval | Thermal-screen pass is used without full EM/thermal/mechanical follow-up | Reliability failure despite positive stage-1 result | Keep this tool explicitly stage-1 and escalate to full verification workflow. | E6, E7, E8, E9 |
| Cost and schedule shock after technical path is chosen | Single-route sourcing and static quote assumptions under concentration exposure | Budget overrun and delayed SOP | Set dual-source triggers, quote-expiry windows, and periodic refresh gates. | E10, E11, E12 |
| EU-bound compliance gaps discovered late | REACH Article 33 / Article 7(2) style obligations are treated as optional attachments | Commercial and shipment risk in downstream stages | Assign compliance owner, due date, and document IDs in RFQ and PO gates. | E13, E14 |
| Air shipment rejected after packaging | No package-level gauss test prior to aircraft booking | Logistics blockers and launch delays | Insert gauss-test gate plus fallback ground/sea logistics plan. | E15 |
Mobile tip: swipe horizontally if columns are truncated.
| Boundary scope | Applies when | Does not apply when | Minimum executable action |
|---|---|---|---|
| Checker verdict scope | You need stage-1 high-temperature SmCo feasibility routing and next-step planning. | You need final electromagnetic, thermal-life, mechanical-retention, and release approval evidence. | Treat output as screening; escalate to full validation before production decisions. |
| Material comparability boundary | You compare SmCo/neo options across multiple suppliers. | You assume grade labels are interchangeable without test-method parity. | Require method-labeled IEC/ASTM-aligned evidence before substitution. |
| EU-bound compliance boundary | The article will enter EU workflows with regulated substance disclosure obligations. | Teams assume one generic declaration closes all downstream duties. | Track >0.1% w/w communication/notification gates with owner/date/evidence IDs before shipment release. |
| Concentration-risk boundary | Programs rely on long lead-time rare-earth supply chains. | Macro concentration data is interpreted as a deterministic quote-time predictor. | Translate concentration signals into sourcing resilience controls and re-check cadence. |
| Air-shipment boundary | Magnet packages are planned for aircraft carriage. | Teams assume technical pass also guarantees transport compliance. | Require package gauss-test evidence and define fallback transport path. |
Mobile tip: swipe horizontally if columns are truncated.
| Scenario | Why it failed | Minimum recovery path | Evidence |
|---|---|---|---|
| Thermal screening passed but irreversible drift appeared in late validation | Generic temperature assumptions were used without lot-level method-aligned curve evidence. | Re-open material decision with method-labeled data and rerun full system validation. | E2, E4, E5, E6, E7, E8, E9 |
| SmCo route was selected but landed cost moved sharply during procurement | Single-route sourcing and stale quote assumptions ignored concentration signals. | Activate dual-source plan and enforce quote-expiry / re-quote gates. | E10, E11, E12 |
| Engineering and RFQ checks passed, but shipment was blocked at booking | No pre-shipment gauss-test proof was prepared for transport screening. | Add logistics-compliance gate and fallback route before dispatch cut-off. | E15 |
Mobile tip: swipe horizontally if columns are truncated.
| Open question | Status | Current evidence state | Minimum executable next step |
|---|---|---|---|
| Open benchmark for long-cycle retention fatigue on matched high-temperature SmCo arc geometry | Pending confirmation | No neutral open dataset was found for life-cycle retention under matched geometry/coating/duty conditions across suppliers. | Run unified coupon + rotor protocol and record comparable fatigue outcomes by supplier lot. |
| Public normalized TCO dataset for SmCo vs high-temp NdFeB under matched duty envelopes | Pending confirmation | Public sources provide directional trends, but normalized cross-program total-cost datasets are limited. | Capture internal quote, validation, and field-risk cost traces under one comparison template. |
| Directly crawlable, legally authoritative live SVHC entry count endpoint for automated gates | Pending confirmation | ECHA direct fetch is blocked in this run, so the reported 253-entry snapshot cannot be promoted to a hard numeric release gate. | Confirm live count from a directly accessible legal source at RFQ-release time and store snapshot evidence in the compliance pack. |
| Open pass-rate benchmark for aircraft magnetic-field compliance by packaging strategy | No reliable public dataset | Regulatory thresholds are clear, but broad neutral pass-rate datasets by packaging method are not commonly published. | Track internal packaging method vs gauss-test outcomes and codify best-performing standards. |
Mobile tip: swipe horizontally if columns are truncated.
| ID | Source | How used in this page | Date context | Link |
|---|---|---|---|---|
| S1 | Brave query sample (arc magnet high temperature smco magnet) | Intent audit evidence supporting a tool-first IA with immediate result and action flow. | Accessed May 25, 2026 | Open source |
| S2 | Arnold RECOMA samarium cobalt page | Public grade and temperature table context used for stage-1 thermal boundary design. | Accessed May 25, 2026 | Open source |
| S3 | Electron Energy SmCo family pages (samarium cobalt, 34-grade, and ultra-high-temperature lines) | Supplier-published temperature-class context for high-temperature SmCo families and data-sheet routing. | Accessed May 25, 2026 | Open source |
| S4 | Arnold reversible temperature coefficient paper | Non-linearity warning and coefficient interpretation boundary near material decisions. | Accessed May 25, 2026 | Open source |
| S5 | NIST-hosted Metrologia paper on SmCo for high-temperature stability context | Independent thermal-property anchor (Curie/temperature-coefficient context) for SmCo vs NdFeB boundary framing. | Paper published 2016, accessed May 25, 2026 | Open source |
| S6 | U.S. DOE Rare Earth Permanent Magnets Supply Chain Deep Dive | Independent NdFeB/SmCo high-temperature routing context plus mine-to-magnet concentration framing. | Published February 2022, rechecked May 25, 2026 | Open source |
| S7 | IEC 60404-8-1:2023 page | Permanent-magnet property specification context for supplier comparison. | Accessed May 25, 2026 | Open source |
| S8 | IEC 60404-5:2015 page | Demagnetization-curve measurement context used in method-boundary sections. | Accessed May 25, 2026 | Open source |
| S9 | IEC 60404-18:2025 page | Open-circuit magnetic-property measurement context and method comparability guardrail. | Accessed May 25, 2026 | Open source |
| S10 | ASTM A977/A977M-07(2020) page | Method-sensitive interpretation reminder for high-coercivity magnet test data. | Accessed May 25, 2026 | Open source |
| S11 | USGS Mineral Commodity Summaries 2026 - Rare Earths | Import reliance and supply-variance context for sourcing-risk controls. | Published February 2026 | Open source |
| S12 | IEA Rare Earth Elements 2026 executive summary | Magnet-specific concentration and demand context for resilience planning. | Published 2026, accessed May 25, 2026 | Open source |
| S13 | European Commission Critical Raw Materials Act page | Policy benchmark context (10/40/25 and <=65%) used for diversification gates. | Accessed May 25, 2026 | Open source |
| S14 | Regulation (EU) 2024/1252 (CRMA legal text) | Legal anchor for diversification and supply-chain-risk thresholds in EU-linked programs. | Adopted April 11, 2024; accessed May 25, 2026 | Open source |
| S15 | ECHA guidance: communication in the supply chain (Candidate List in articles) | Article-level >0.1% w/w communication trigger context for compliance boundary rows. | Cached snapshot rechecked May 25, 2026 (direct fetch blocked in this run) | Open source |
| S16 | ECHA guidance: notification of substances in articles | Article 7(2) style notification trigger context used in RFQ compliance gates. | Cached snapshot rechecked May 25, 2026 (direct fetch blocked in this run) | Open source |
| S17 | ECHA homepage snapshot with Candidate List count | Reported 253-entry snapshot used with pending-confirmation disclosure only. | Snapshot observed in search cache on May 25, 2026 | Open source |
| S18 | FAA PackSafe magnets page | Operational threshold used for air-shipment logistics gate. | Rechecked May 25, 2026 | Open source |
| S19 | 49 CFR 173.21 | Regulatory aircraft-carriage boundary for package magnetic field threshold. | Rechecked May 25, 2026 | Open source |
Main CTA: send your arc magnet high temperature smco magnet RFQ package