---
title: "Boom"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:BOOM"
  data_integrity_hash: "4fa2405a7eeccafe4a342eb6dc98d1ec"
  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:BOOM"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/boom.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/boom"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "15-35 MPa hydraulic pressure, 0.5-2.5 m/s extension/retraction velocity, -40°C to +85°C ambient temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 345
    unit: "MPa"
    consequence: "High-cycle fatigue from cyclic bending moments (σ_max = 280 MPa, R-ratio = 0.1), stress concentration at weld toes (K_t = 2.8), corrosion-fatigue interaction in chloride environments reducing fatigue limit by 40%"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Hydraulic fluid contamination exceeding ISO 4406 18/16/13 cleanliness level"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install 3 μm absolute filtration with differential pressure monitoring at 0.3 bar threshold"
  - node_2:
      trigger: "Overload condition exceeding 125% rated digging force (375 kN) for &gt;30 seconds"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement load moment indicator system with automatic hydraulic flow reduction at 90% rated capacity"
bom_nodes:
  boom-cylinder-mounting-brackets:
    type: "component"
    urn: "URN:CNFX:ME:BOOM_CYLINDER_MOUNTING_BRACKETS"
    interface_type: "physical-logic-coupled"
  stick-connection-pins:
    type: "component"
    urn: "URN:CNFX:ME:STICK_CONNECTION_PINS"
    interface_type: "physical-logic-coupled"
  reinforcement-plates:
    type: "component"
    urn: "URN:CNFX:ME:REINFORCEMENT_PLATES"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "CE MARKING (MACHINERY DIRECTIVE 2006/42/EC)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/boom.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "cc040d8824f6d9898fc16d2c5e7e1c755133e68e88da1e9bc291a075a41c0927"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Boom

## 1. Technical Definition
The main structural arm of a hydraulic excavator that connects the cab to the stick and bucket assembly.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **15-35 MPa hydraulic pressure, 0.5-2.5 m/s extension/retraction velocity, -40°C to +85°C ambient temperature**. Failure boundary: **Material yield strength exceeded at 345 MPa (ASTM A572 Grade 50 steel), fatigue crack initiation at 10^7 cycles with 150 MPa stress amplitude, buckling at 1.5× design load (450 kN)**, Mechanism: **High-cycle fatigue from cyclic bending moments (σ_max = 280 MPa, R-ratio = 0.1), stress concentration at weld toes (K_t = 2.8), corrosion-fatigue interaction in chloride environments reducing fatigue limit by 40%**.

### 2.1 Analytical Physics Model
Governed by the **Frame Structural Deflection Analysis**:

> **Primary Equation**: $\delta = \frac{5 q L^4}{384 E I}$  
> **Engineering Impact**: Ensures structural stability for multi-stage machines.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| q | Uniform Load | Engineering Constant |
| E | Elastic Modulus | Engineering Constant |
| I | Moment of Inertia | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Hydraulic fluid contamination exceeding ISO 4406 18/16/13 cleanliness level | 8 | Seal extrusion and gland failure causing hydraulic cylinder leakage at 5 L/min | Install 3 μm absolute filtration with differential pressure monitoring at 0.3 bar threshold |
| Overload condition exceeding 125% rated digging force (375 kN) for &gt;30 seconds | 8 | Plastic hinge formation at boom-to-stick pivot connection with 12° permanent angular deformation | Implement load moment indicator system with automatic hydraulic flow reduction at 90% rated capacity |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Hydraulic Excavator Chassis**, **Hydraulic Power Unit**, **Operator Control System**  
**Downstream Applications**: Hydraulic Excavator, Construction Equipment, Mining Machinery  

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

### Q: What materials are used in manufacturing excavator booms?
**A**: Excavator booms are primarily constructed from high-strength steel to withstand extreme loads and harsh operating conditions in machinery and equipment manufacturing.

### Q: How does the boom connect to other excavator components?
**A**: The boom serves as the main structural arm that connects the cab to the stick and bucket assembly using stick connection pins and boom cylinder mounting brackets for hydraulic operation.

### Q: What maintenance is required for excavator booms?
**A**: Regular inspection of reinforcement plates, cylinder mounting brackets, and connection pins is essential. Look for stress cracks, wear patterns, and ensure proper lubrication of all pivot points.

## 6. Manufacturing Compliance
- ISO 9001:2015 QUALITY MANAGEMENT SYSTEMS
- CE MARKING (MACHINERY DIRECTIVE 2006/42/EC)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Boom](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/boom)**

### 🌐 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**: BOOM | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 65079b00
