ASTM A268: Ferritic Martensitic Stainless Tube Testing Services
ASTM A268 is a standard specification that covers and gives detailed information regarding the number of grades of nominal wall thickness stainless steel tubing for general corrosion-resistant and high-temperature service. Most of these types are ferrimagnetic and known as straight chromium types.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
What Is ASTM A268 Ferritic Martensitic Stainless Tube?
ASTM A268 specifies requirements for seamless and welded ferritic and martensitic stainless steel tubing intended for general corrosion-resistant and high-temperature service. The standard defines chemical composition, mechanical properties, heat treatment conditions, and dimensional tolerances.
This specification is widely used in industries such as power generation, automotive, heat exchangers, and industrial processing. It ensures that stainless steel tubing meets performance requirements for strength, durability, and resistance to oxidation and corrosion.
Applications and Benefits of ASTM A268 Ferritic Martensitic Stainless Tube Testing
Scope
ASTM A268 covers tubing made from ferritic and martensitic stainless steels, produced by either the seamless or the welded process. The specification ensures compliance with chemical composition, mechanical properties, and heat treatment requirements.
The standard evaluates:
- Chemical composition of stainless steel grades
- Mechanical properties such as tensile strength and hardness
- Heat treatment and tempering conditions
- Dimensional tolerances and surface quality
- Corrosion and oxidation resistance
Applications
- Heat exchangers and condensers
- Boiler and superheater tubing
- Automotive exhaust systems
- Industrial piping and tubing systems
- Power plant and energy sector components
- General engineering applications
Benefits
- Ensures consistent material quality and performance
- Provides corrosion and oxidation resistance
- Supports high-temperature service applications
- Assists in material selection and design
- Enables comparison between tubing grades
Our ASTM A268 Testing Procedure
Material Identification
Tubing grade and specifications are verified based on ASTM requirements.
1Mechanical Testing
Tensile and hardness tests are performed to evaluate strength and durability.
2Chemical Analysis
Elemental composition is analyzed to confirm compliance with specified grades.
3Data Recording & Evaluation
Results are compared against ASTM A268 requirements for acceptance.
4ASTM A268 Test Parameters and Requirements
| Parameter | Details |
|---|---|
| Applicable Materials | Ferritic and martensitic stainless steels |
| Product Forms | Seamless and welded tubing |
| Outer Diameter Range | ~6 mm to 250 mm |
| Wall Thickness | ~0.5 mm to 25 mm |
| Tensile Strength | ~415 MPa to 760 MPa |
| Hardness Range | ~150 to 300 HB |
- Universal testing machine
- Optical emission spectrometer (OES)
- Hardness tester (Brinell/Rockwell)
- Dimensional measurement tools
- Metallurgical microscope
- Data acquisition system
Equipment and Instrumentation Used for ASTM A268 Testing
What You Receive: Test Report, Data, and Certification
- Chemical composition verification
- Mechanical property test results
- Dimensional and surface inspection data
- Material grade confirmation
- Test condition summary
- ASTM compliance report
ASTM A268 Ferritic Martensitic Stainless Tube FAQs
ASTM A268 includes chemical composition, mechanical properties, heat treatment, dimensional tolerances, surface finish, and corrosion resistance, ensuring seamless and welded ferritic and martensitic stainless steel tubing meets general service requirements.
ASTM A268 covers ferritic and martensitic stainless steels in seamless and welded tubing forms, used for applications requiring moderate corrosion resistance and mechanical strength.
ASTM A268 defines tensile strength, yield strength, elongation, and hardness requirements, ensuring tubing materials meet performance criteria for structural and industrial applications.
ASTM A268 tubing is used in heat exchangers, boilers, condensers, and general industrial piping systems requiring stainless steel materials with corrosion resistance and strength.
ASTM A268 defines properties under controlled conditions and may not account for welding effects, fabrication processes, or service environments influencing long-term performance of stainless steel tubing.
Why Choose Infinita Lab for Ferritic Martensitic Stainless Tube Testing
At the core of this breadth is our network of 2,000+ accredited laboratories across the USA, offering access to over 10,000 testing methods and analytical services. From advanced materials characterization (SEM, TEM, RBS, XPS) to mechanical, chemical, environmental, biological, and standardized ASTM/ISO-compliant testing, we deliver unmatched flexibility, specialization, and scale. You are never limited by geography, facility, or methodology — Infinita Lab connects you to the right expertise and testing solution, every time.
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