---
title: "Crucible"
industry: "Basic Metal Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:CRUCIBLE"
  data_integrity_hash: "4641c77a05109c2c391b6773ff8d61e6"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:CRUCIBLE"
  data_source_uri: "https://cnfx.com/llms/industry/basic-metal-manufacturing/product/crucible.md"
  official_resource_url: "https://cnfx.com/industry/basic-metal-manufacturing/product/crucible"
  is_verified_logic: true
attributes:
  primary_spec:
    status: "config-dependent"
    typical_range: "800-1800°C with 0.5-2.0 MPa internal pressure"
    unit: "liters (L) or cubic centimeters (cm³)"
engineering_limits:
  max_safe_operating_point:
    value: 1650
    unit: "°C"
    consequence: "Thermal fatigue from cyclic heating/cooling exceeding 1000°C differentials, causing microcrack propagation via Paris' Law (da/dN = C(ΔK)^m) with C=1.2e-10 m/cycle and m=3.2 for refractory ceramics"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Thermal shock exceeding 300°C/min heating rate"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Graded refractory design with zirconia inner layer (CTE 10.5×10^-6/K) transitioning to alumina outer layer (CTE 8.1×10^-6/K)"
  - node_2:
      trigger: "Chemical corrosion from molten slag with basicity index &gt;1.5"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Magnesia-chrome lining with 60% MgO content and 15% Cr₂O₃ addition for slag resistance"
bom_nodes:
  crucible-body-0:
    type: "part"
    urn: "URN:CNFX:ME:CRUCIBLE_BODY"
    interface_type: "physical-logic-coupled"
  lid-1:
    type: "component"
    urn: "URN:CNFX:ME:LID_1"
    interface_type: "physical-logic-coupled"
  pouring-spout-2:
    type: "component"
    urn: "URN:CNFX:ME:POURING_SPOUT_2"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 3585:1998 - BOROSILICATE GLASS 3.3 - PROPERTIES"
    scope: "Verified Engineering Specification"
  - standard: "CE MARKING (EU DIRECTIVE 2014/35/EU FOR ELECTRICAL EQUIPMENT IF HEATED)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/basic-metal-manufacturing/product/crucible.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "c162bfc5c1a786d61ada3c94ae392078138c17a111df62f369ab78a71a5bc721"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Crucible

## 1. Technical Definition
A heat-resistant container designed to hold and melt materials at high temperatures within industrial processes.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **800-1800°C with 0.5-2.0 MPa internal pressure**. Failure boundary: **Material yield strength reduction to 50% of room temperature value at 1650°C for alumina-silica refractories**, Mechanism: **Thermal fatigue from cyclic heating/cooling exceeding 1000°C differentials, causing microcrack propagation via Paris' Law (da/dN = C(ΔK)^m) with C=1.2e-10 m/cycle and m=3.2 for refractory ceramics**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Thermal shock exceeding 300°C/min heating rate | 8 | Radial crack propagation through refractory lining | Graded refractory design with zirconia inner layer (CTE 10.5×10^-6/K) transitioning to alumina outer layer (CTE 8.1×10^-6/K) |
| Chemical corrosion from molten slag with basicity index &gt;1.5 | 8 | Refractory dissolution at slag-crucible interface exceeding 2 mm/hour | Magnesia-chrome lining with 60% MgO content and 15% Cr₂O₃ addition for slag resistance |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| primary_spec | Config-dependent | liters (L) or cubic centimeters (cm³) | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Crucible Body](https://cnfx.com/llms/industry/basic-metal-manufacturing/product/crucible-body.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Induction Furnace**, **Temperature Control System**, **Material Handling System**  
**Downstream Applications**: Steel Ingots, Aluminum Alloys, Copper Rods  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What materials are best for crucibles in basic metal manufacturing?
**A**: Graphite and ceramic materials like alumina and silicon carbide are most common for basic metal manufacturing due to their high heat resistance, durability, and chemical stability at extreme temperatures.

### Q: How do I choose between different crucible materials?
**A**: Select crucible material based on your melting temperature, material compatibility, and process requirements. Graphite offers excellent thermal conductivity, ceramics provide chemical inertness, quartz allows visibility, and platinum handles precious metals.

### Q: What maintenance is required for industrial crucibles?
**A**: Regular inspection for cracks, proper preheating before use, careful handling to avoid thermal shock, and thorough cleaning between uses to prevent contamination are essential for maintaining crucible performance and longevity.

## 6. Manufacturing Compliance
- ISO 3585:1998 - BOROSILICATE GLASS 3.3 - PROPERTIES
- CE MARKING (EU DIRECTIVE 2014/35/EU FOR ELECTRICAL EQUIPMENT IF HEATED)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Crucible](https://cnfx.com/industry/basic-metal-manufacturing/product/crucible)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: CRUCIBLE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 04ebd088
