What is Aircraft Stainless Steel Tubing?
Jun 09, 2025
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Aircraft stainless steel tubing refers to precision-engineered stainless steel tubes used in the aerospace industry for fluid transmission, structural support, and critical systems in aircraft. These tubes are designed to meet stringent aerospace specifications and performance requirements, including high strength-to-weight ratio, corrosion resistance, and temperature tolerance.
Key Characteristics of Aircraft Stainless Steel Tubing
Material Grades:
Common grades include 304, 321, 347, 316, 316L, and 17-4PH, each offering specific benefits like weldability, heat resistance, or high strength.
Manufacturing Standards:
Tubes are manufactured to aerospace standards such as AMS 5566, AMS 5570, AMS 5557, ASTM A269, or MIL-T-8808.
Precision Tolerances:
Typically cold-drawn or cold-rolled to achieve tight dimensional control and smooth surface finishes (e.g., Ra ≤ 0.8 μm).
Test Requirements:
Subject to nondestructive testing (NDT), hydrostatic pressure tests, eddy current testing, and intergranular corrosion resistance checks.
What is aircraft tubing used for?
Hydraulic and fuel lines
Exhaust systems and heat exchangers
Aircraft fuselage and structural supports
Engine tubing and bleed air lines
Aircraft tubing must perform reliably under high pressure, vibration, high/low temperatures, and corrosive atmospheres-especially in environments like jet engines, fuel systems, and exterior aircraft frames.
Stainless steel aircraft exhaust pipe Grades
| Grade | Key Properties |
|---|---|
| 304/304L | Excellent corrosion resistance, cost-effective, good weldability |
| 321 | Titanium stabilized, resists intergranular corrosion during welding, heat stable |
| 316/316L | Mo-added for superior corrosion resistance in saltwater and acidic environments |
| 17-4PH | High strength, hardness, and corrosion resistance after heat treatment |
What sizes does aircraft stainless steel tubing come in?
A: Typical outer diameters range from 1/8" to 2" (3.18 mm to 50.8 mm), with wall thickness from 0.02" to 0.12" (0.5 mm to 3 mm) depending on application.
What standards govern aircraft tubing?
A: Common standards include AMS 5566, AMS 5570, ASTM A269, MIL-T-8808, and AMS 5557.
Is stainless tubing used in commercial or military aircraft?
A: Both. Aircraft tubing is used extensively across commercial jets, helicopters, defense aircraft, and spacecraft due to its durability and performance in extreme environments.
Why Choose GNEE Aircraft Stainless Steel Tubing?
we offer:
Aerospace-grade stainless steel tubing with full traceability and certification
Customized sizes, tolerances, and surface finishes
Tubes that pass salt spray, NDT, and 20 MPa hydraulic testing
Global supply to OEMs, MROs, and aerospace manufacturers
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