253MA Stainless Steel Seamless Pipe
Short Description:
253MA Stainless Steel Seamless Pipe is a heat-resistant austenitic tube for high-temperature service up to about 1150°C. It offers high creep strength, excellent oxidation resistance and good structural stability for furnaces, radiant tubes, kilns, heat-treatment and power-generation equipment.
253MA Stainless Steel Seamless Pipe
253MA Stainless Steel Seamless Pipe is a heat-resistant austenitic stainless steel tube designed for elevated-temperature service. Also known as UNS S30815 / EN 1.4835, 253MA combines chromium, nickel, silicon, nitrogen and controlled rare-earth additions to provide high-temperature strength, oxidation resistance and good structural stability.
SAKY STEEL supplies 253MA seamless pipe and tube for furnace systems, radiant tubes, heat-treatment equipment, kilns, process furnaces and other high-temperature applications where long-term oxidation resistance and creep performance are important.
For 253MA tubing, buyers should confirm operating temperature, service atmosphere, outside diameter, wall thickness, length, applicable standard and required inspection.
Grade: 253MA / UNS S30815 / EN 1.4835
Product Form: Seamless Pipe / Seamless Tube
Main Service: High-Temperature / Heat-Resistant Applications
Request 253MA Pipe Quote
253MA Seamless Pipe Specifications
| Item | Specification |
|---|---|
| Grade | 253MA |
| UNS | S30815 |
| EN Grade | 1.4835 |
| Material Type | Heat-Resistant Austenitic Stainless Steel |
| Product Form | Seamless Pipe / Seamless Tube |
| Typical Standards | ASTM A213 / ASTM A312 / EN 10297-2 or agreed specification |
| Outside Diameter | According to confirmed order specification |
| Wall Thickness | According to confirmed order specification |
| Length | Fixed Length / Random Length / Custom |
| Surface | Pickled / Bright / As Agreed |
| Documentation | MTC / EN 10204 3.1 according to confirmed order requirement |
Why 253MA Is Used for High-Temperature Piping
| High-Temperature Strength
Designed to retain useful mechanical strength during prolonged elevated-temperature service. |
Oxidation Resistance
Chromium and silicon support formation of a protective oxide scale during high-temperature exposure. |
Creep Resistance
Suitable for components exposed to sustained mechanical loading at elevated temperature. |
Thermal Cycling
Suitable for applications involving repeated heating and cooling cycles. |
Actual 253MA Pipe Inspection
Dimensional and material verification can be performed before shipment. The following photos show actual inspection of a 253MA seamless pipe sample, including outside diameter, wall thickness and alloy composition verification.
Outside diameter measurement |
Wall thickness measurement |
PMI / alloy composition verification |
| Inspection Item | Measured / Displayed Result | Purpose |
|---|---|---|
| Outside Diameter | Approx. 101.78 mm | Verify finished tube diameter |
| Wall Thickness | Approx. 2.952 mm | Verify actual pipe wall thickness |
| PMI Grade Identification | S30815 displayed by analyzer | Confirm 253MA / UNS S30815 material identity |
| Cr | 20.45% | PMI displayed value |
| Ni | 10.49% | PMI displayed value |
| Fe | 66.56% | PMI displayed value |
The values above are taken from the displayed inspection sample and apply only to the tested piece shown. Final batch acceptance should be based on the applicable product specification, MTC and agreed inspection requirements.
High-Temperature Service Selection
Selecting 253MA pipe should not be based on temperature alone. Actual service performance also depends on atmosphere, mechanical load, thermal cycling and required service life.
| Selection Factor | Why It Matters |
|---|---|
| Operating Temperature | Affects oxidation rate and available high-temperature strength |
| Thermal Cycling | Repeated heating and cooling influence oxide-scale stability |
| Mechanical Load | Long-term loading requires creep-strength consideration |
| Process Atmosphere | Oxidizing, reducing, sulfur-containing and carburizing conditions behave differently |
| Pipe Dimensions | OD and wall thickness affect mechanical performance and heat transfer |
253MA Temperature Capability
253MA is commonly used for high-temperature service and may be selected for applications approaching approximately 1150°C under suitable oxidizing conditions.
1150°C should not be treated as a universal design temperature. Actual allowable operating temperature depends on atmosphere, stress, pressure, thermal cycling and required service life.
253MA Chemical Composition
253MA uses chromium, nickel, silicon and nitrogen together with a controlled rare-earth addition to support oxidation resistance and high-temperature mechanical performance.
| Element | Typical / Nominal Content |
|---|---|
| C | Approx. 0.08% |
| Si | Approx. 1.6% |
| Mn | ≤0.8% |
| Cr | Approx. 21% |
| Ni | Approx. 11% |
| N | Approx. 0.17% |
| Rare-Earth Addition | Small controlled addition |
Final chemical composition should be confirmed by the applicable product standard and supplied material certificate.
Why 253MA Performs Well at High Temperature
| Element | Function |
|---|---|
| Chromium | Supports formation of a protective chromium-rich oxide layer |
| Silicon | Improves oxidation resistance at elevated temperatures |
| Nitrogen | Contributes to high-temperature strength |
| Nickel | Supports stable austenitic structure |
| Rare-Earth Addition | Supports oxide-scale adhesion during thermal exposure |
253MA vs 310S Stainless Steel
Both grades are used for high-temperature service, but their alloy design and preferred operating conditions are different.
| Item | 253MA | 310S |
|---|---|---|
| Material Type | Heat-resistant austenitic stainless steel | High-Cr, high-Ni heat-resistant austenitic stainless steel |
| Nickel Level | Lower | Higher |
| High-Temperature Strength | High creep-strength design | Good high-temperature strength |
| Typical Selection | Often selected where creep strength and thermal cycling are important | Often selected for high-temperature oxidation service and specific process atmospheres |
Applications of 253MA Stainless Steel Seamless Pipe
| Radiant Tubes
High-temperature furnace heating systems |
Furnace Tubes
Industrial furnace and heat-treatment equipment |
Rotary Kilns
High-temperature process equipment |
| Heat Treatment
Furnace and thermal-processing components |
Power Generation
Selected high-temperature components |
Process Furnaces
Petrochemical and industrial heating equipment |
Inspection & Quality Control
| Inspection Item | Purpose |
|---|---|
| PMI / Material Verification | Verify 253MA / UNS S30815 material identity |
| OD Measurement | Verify finished outside diameter |
| Wall Thickness | Verify actual tube wall thickness |
| Length Inspection | Verify finished tube length |
| Surface Inspection | Check visible surface condition and defects |
| NDT | UT / Eddy Current or other testing according to specification when required |
| MTC | EN 10204 3.1 documentation according to confirmed order |
253MA Seamless Pipe Packaging
Packaging is selected according to pipe dimensions, wall thickness, length and shipment requirements.
FAQ
Is 253MA a duplex stainless steel?
No. 253MA / UNS S30815 is a heat-resistant austenitic stainless steel, not a duplex stainless steel.
What is 253MA seamless pipe mainly used for?
It is primarily used in radiant tubes, furnace tubes, kilns, heat-treatment systems and other equipment requiring oxidation resistance and high-temperature mechanical strength.
What is the typical maximum service temperature?
253MA may be used at temperatures approaching approximately 1150°C under suitable oxidizing conditions. Actual design temperature depends on atmosphere, load, pressure, thermal cycling and required service life.
Can PMI be used to verify 253MA?
PMI can be used to verify key alloying elements and assist with grade identification. Final material acceptance should follow the applicable specification and material certificate.
Can EN 10204 3.1 documentation be supplied?
Yes. Material documentation and batch traceability can be supplied according to the confirmed order requirement.
Need 253MA Seamless Pipe for High-Temperature Service?
Send the required OD, wall thickness, length, quantity, operating temperature and applicable standard. SAKY STEEL can review the specification and provide a quotation for 253MA / UNS S30815 seamless pipe and tube.
