ASTM A213 TP310S / 1.4845 / S31008 Stainless Steel Seamless Tube Heat Exchanger Tube
ASME SA213/ASTM A213 TP310S / UNS S31008 Stainless Steel Seamless Heat Exchanger Tube
ASTM A213 TP310S is the correct choice for a heat exchanger tube operating in continuous high temperatures (800°C – 1100°C) in oxidizing, carburizing, or mildly sulfidizing environments. It offers excellent oxidation resistance but limited creep strength above 900°C. Do not use it for aqueous chloride service or below 550°C if long-term embrittlement is a concern.
Choose TP310S when:
-
Operating temperature exceeds 850°C (1560°F) continuously.
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Environment contains carbon (carburization, metal dusting risk).
-
Sulfur-bearing hot flue gas (sulfidation).
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Polythionic acid SCC is a concern (refinery/Claus service).
-
High-temperature hydrogen service above 450°C.
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You need oxidation resistance to 1150°C with good weldability.
Chemical Composition % of ASTM A213 TP310S Stainless Steel Seamless Tube Heat Exchanger Tube
| Grade | UNS | C | Mn | P | S | Si | Ni | Cr |
| TP310S | S31008 | 0.08max | 2max | 0.045max | 0.03max | 1.0max | 19.0–22.0 | 24.0-26.0 |
Mechanical properties of ASTM A213 TP310S Stainless Steel Seamless Tube Heat Exchanger Tube
|
Grade
|
Tensile Strength |
Yield Stress
0.2% Proof (MPa) min |
Elong
(% in 50mm) min |
Hardness
|
|
Rockwell B (HR B) max
|
||||
|
310S |
515 | 205 | 35 |
90
|
Physical Properties of ASTM A213 TP310S Stainless Steel Seamless Tube Heat Exchanger Tube
| SS | UNS | SPEC | Density Specific Gravity kg/dm³ | Modulus of Elasticity (x106 psi) |
Mean Coefficient of Thermal Expansion (IN./IN./°F x 10-6) |
Thermal Conductivity (BTU-in/ft2-h-°F) |
|
310S |
S31008 |
A213/A312 |
7.98 |
29.0 |
9.2 |
116 |
Surface Finish Options
| Finish | Code | Description | Best for |
|---|---|---|---|
| Pickled (AP) | AP | Acid bath removes scale; dull gray matte | General heat exchanger service |
| Bright annealed (BA) | BA | Annealed in controlled atmosphere (H₂); shiny, oxide-free | Clean service, food/pharma, low fouling |
| Polished | MP | Mechanically polished to Ra ≤ 0.4 µm | High-purity or aesthetic |
| As-drawn | No finish | No removal of drawing lubricant or oxide | Not recommended – requires cleaning |
Application
- Syngas coolers in hydrogen reformers
- Transfer line exchangers (TLE) in ethylene cracking
- High-pressure superheaters / reheaters in HRSG
- Tail gas reheaters in Claus sulfur recovery units
- Gas/gas heat exchangers in nitric acid plants
- Quench coolers in carbon black production
- Suspension preheater ducts & heat exchangers in cement/lime kilns
- Quench coolers in industrial incinerators / thermal oxidizers
- Molten salt coolers in maleic anhydride reactors
- High-temperature hydrogen reheaters in refineries
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