Product Parameters
TU 14-3-675-78 Seamless Steel Tubes For Aircraft
Material
The TU 14-3-675-78 standard outlines the specifications for seamless steel tubes designed specifically for use in aircraft applications. These tubes are meticulously engineered to meet stringent requirements for performance and durability in aviation environments.
Specification
The specification covers various aspects including dimensions, tolerances, chemical composition, mechanical properties, physical properties, and process performance.
Key Features
High Strength: Designed to withstand the demanding conditions experienced in aircraft structures.
Corrosion Resistance: Provides protection against corrosion to ensure longevity and reliability.
Precision Manufacturing: Seamless construction ensures uniformity and integrity throughout the tube.
Chemical Composition (Table presentation)
| Element | Percentage (%) |
| Carbon (C) | 0.15 - 0.22 |
| Manganese | 0.30 - 0.60 |
| Silicon | 0.10 - 0.40 |
| Phosphorus | ≤ 0.025 |
| Sulfur | ≤ 0.025 |
| Chromium | ≤ 0.030 |
| Nickel | ≤ 0.030 |
| Copper | ≤ 0.030 |
Mechanical Properties (Table presentation)
| Property | Requirement |
| Tensile Strength | ≥ 550 MPa |
| Yield Strength | ≥ 480 MPa |
| Elongation | ≥ 12% |
| Impact Toughness | ≥ 70 J/cm² |
| Hardness (HB) | 150 - 200 |
| Fatigue Strength | ≥ 350 MPa (R = -1) |
Physical Properties (Table presentation)
| Property | Value |
| Density | 7.85 g/cm³ |
| Melting Point | ~ 1420°C |
| Thermal Conductivity | 43 W/(m·K) |
| Electrical Conductivity | 16.3 MS/m |
| Specific Heat | 0.50 J/(g·K) |
Process Performance (Table presentation)
| Performance Parameter | Requirement |
| Weldability | Excellent |
| Machinability | Good |
| Formability | Excellent |
| Surface Finish | Smooth, defect-free |
| Heat Treatment | Hardenable |
Steel Grade
The steel grade specified in TU 14-3-675-78 is carefully selected to ensure optimal performance in aviation applications.
Application
These seamless steel tubes find extensive use in various aircraft components including structural elements, hydraulic systems, and fuel lines, where reliability and performance are paramount.
Possible Alternative Grades
While TU 14-3-675-78 outlines specific requirements, alternative grades with similar properties may also be considered based on application-specific needs. Some potential alternatives include AISI 4130, AISI 4340, and DIN 1.7225, each offering unique advantages and characteristics for aviation applications.
Product Show
Hot Tags: tu 14-3-675-78 seamless steel tubes for aircraft, China, suppliers, manufacturers, factory, customized, wholesale, price, OEM, mill, producer, for sale, tp304l stainless steel pipe, seamless steel pipe, seamless steel tube manufacturer, Big Diameter Seamless Steel Tube, cold rolled steel pipe
