ASTM A213 T5 (ASME SA213 T5) is a low-alloy seamless steel tube containing 4.00–6.00% chromium (Cr) and 0.45–0.65% molybdenum (Mo), offering excellent high-temperature strength and corrosion resistance, and is primarily used in high-temperature, high-pressure equipment such as boilers, superheaters, and heat exchangers.
UNS designation is K41545.
In the ASTM A213 standard, in addition to T5, alloys with the same chromium and molybdenum content include T5b (UNS K51545) and T5c (UNS K41245), differing only slightly in the content of carbon, silicon, and other elements.
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| Grade | Composition, % | |||||||
| C | Mn | P | S | Si | Cr | Mo | Ti | |
| T5 | 0.15 max | 0.30 ~ 0.60 | 0.025 max | 0.025 max | 0.50 max | 4.00 ~ 6.00 | 0.45 ~ 0.65 | |
| T5b | 0.15 max | 0.30 ~ 0.60 | 0.025 max | 0.025 max | 1.00 ~ 2.00 | 4.00 ~ 6.00 | 0.45 ~ 0.65 | |
| T5c | 0.12 max | 0.30 ~ 0.60 | 0.025 max | 0.025 max | 0.50 max | 4.00 ~ 6.00 | 0.45 ~ 0.65 | 4xC ~ 0.70 |
| Mechanical Properties | T5 / T5c | T5b | |
| Tensile Requirements | Tensile Strength | 60 ksi [415 MPa] min | |
| Yield Strength | 30 ksi [205 MPa] min | ||
| Elongation in 2 in. or 50 mm |
30 % min | ||
| Hardness Requirements | Brinell/Vickers | 163 HBW / 170 HV max | 179 HBW / 190 HV max |
| Rockwell | 85 HRB max | 89 HRB max | |
| Flattening Test | One flattening test shall be made on specimens from each end of one finished tube, not the one used for the flaring test, from each lot. | ||
| Flaring Test | One flaring test shall be made on specimens from each end of one finished tube, not the one used for the flattening test, from each lot. | ||
Manufacturer and Condition
ASTM A213 T5 steel pipes shall be made by the seamless process and shall be either hot finished or cold finished, as specified.
Heat Treatment
T5 steel pipes shall be reheated for heat treatment according to the following methods, and the heat treatment shall be carried out separately and in addition to heating for hot forming.
| Grade | Heat Treat Type | Cooling Media | Subcritical Annealing or Temperature |
| ASTM A213 T5 | full or isothermal anneal | — | — |
| normalize and temper | — | 1250 ℉ [675 ℃] min | |
| ASTM A213 T5b | full or isothermal anneal | — | — |
| normalize and temper | — | 1250 ℉ [675 ℃] min | |
| ASTM A213 T5c | subcritical anneal | air or furnace | 1350 ℉ [730 ℃] min |
Some will air harden, that is, become hardened to an undesirable degree when cooled in ạir from high temperatures, particularly chromium-containing steels with chromium of 4% and higher. Therefore, operations that involve heating such steels above their critical temperatures, such as welding. flanging. and hot bending. should be followed by suitable heat treatment.
Appearance
ASTM A213 ferritic alloy cold-finished steel tubes shall be free of scale and suitable for inspection. A slight amount of oxidation is not considered scale.
Ferritic alloy hot-finished steel tubes shall be free of loose scale and suitable for inspection.
Dimension
ASTM A213 T11 tubing sizes and wall thicknesses are usually furnished with inside diameters ranging from 3.2 mm to outside diameters of 127 mm, and minimum wall thicknesses from 0.4 mm to 12.7 mm.
Other sizes of T11 steel pipes can also be supplied, provided that all other requirements of ASTM A213 are met.
Each tube shall be subjected to the nondestructive electric test or the hydrostatic test. The type of test to be used shall be at the option of the manufacturer, unless otherwise specified in the purchase order.
The ASTM A1016 standard allows the use of non-destructive testing in place of hydrostatic testing.
ASTM A213 T5 alloy seamless steel pipes are primarily used in industrial applications under high-temperature and high-pressure conditions, with notable performance in the power generation, chemical, and oil & gas industries.
Typical applications include boiler tubes, heat exchanger tubes, chemical process piping, boiler accessories and pressure vessels, and pipelines for high-temperature gas transportation.
| ASME | UNS | ASTM | EN |
| ASME SA213 T5 | K41545 | ASTM A335 P5 | EN 10216-2 X11CrMo5+I |
Material: ASTM A213 T5 seamless steel pipes and fittings;
Size: 1/8" to 24", or customized according to your requirements;
Length: Random length or cut to order;
Packaging: Black coating, beveled ends, pipe end protectors, wooden crates, etc.
Support: IBR certification, TPI inspection, MTC, cutting, processing, and customization;
MOQ: 1 m;
Payment Terms: T/T or L/C;
Price: Contact us for the latest T5 steel pipe prices.
