ASTM A213 Heat Exchanger Tubes
A213 alloy pipes are ferritic and Austrian alloy steel seamless steel pipes for boilers, superheaters and heat exchangers (ASTM A213/A213M-07a), and T91 alloy pipes are used in low and medium pressure boilers (working pressure is generally not greater than 5.88Mpa, working temperature below 450℃); heating surface pipes, economizers, superheaters, reheaters, Pipes for petrochemical industry, etc.
The final heat treatment of A213 heat exchanger steel pipe is normalizing + high temperature tempering. The normalizing temperature is 1040℃, the holding time is not less than 10 min, the tempering temperature is 730~780℃, the holding time is not less than 1h. After the final heat treatment The structure is tempered martensite.
A213 T91 steel pipe has normal temperature tensile strength ≥ 585 MPa, normal temperature yield strength ≥ 415 MPa, hardness ≤ 250 HB, elongation (standard circular specimen with 50 mm gauge) ≥ 20%, allowable stress value [σ] 650℃=30 MPa.
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| PRODUCT NAME | STANDARD | GRADE | SIZE RANGE OD. | USAGE |
| Seamless Alloy Steel Boiler, Superheater and Heat Exchanger Tubes | ASME/ASTM SA/A213 | T11, T12, T2, T22, T23, T5, T5b, T9, T91 | 19.05mm to 114.3mm | Heat Exchanger, Condenser and Boilers |
| ASME/ASTM SA/A209 | T1 | 19.05mm to 114.3mm | Superheater | |
| DIN17175 | 15Mo3, 13CrMo44, 10CrMo910, 12CrMo195 | 19.05mm to 1200mm | High Temperature and High Pressure Boiler |
A213 element alloy pipe Chemical composition
| Grade | C | Mn | P | S | Si |
| T2 | 0.10–0.20 | 0.30–0.61 | 0.025 | 0.025B | 0.10–0.30 |
| T5 | 0.15 | 0.30–0.60 | 0.025 | 0.025 | 0.5 |
| T5b | 0.15 | 0.30–0.60 | 0.025 | 0.025 | 1.00–2.00 |
| T9 | 0.15 | 0.30–0.60 | 0.025 | 0.025 | 0.25–1.00 |
| T11 | 0.05–0.15 | 0.30–0.60 | 0.025 | 0.025 | 0.50–1.00 |
| T12 | 0.05–0.15 | 0.30–0.61 | 0.025 | 0.025B | 0.5 |
| T22 | 0.05–0.15 | 0.30–0.60 | 0.025 | 0.025 | 0.5 |
| T23 | 0.04–0.10 | 0.10–0.60 | 0.03 | 0.01 | 0.5 |
| T91 | 0.07–0.14 | 0.30–0.60 | 0.02 | 0.01 | 0.20–0.50 |
Details
Manufacture:Seamless process ,Hot-finished or Cold-finished
Wall thickness(WT): 0.9 mm--12.7 mm.
Outer diameter (OD): 12.7 mm--127 mm
Length: 6M or specified length as required.
Ends: Plain End, Beveled End, Treaded
Tubes Packaging:Loose / Bundle / Wooden Pallet / Wooden box-a / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector
Transportation:By Road - Truck / Train, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load)
ASTM A213 seamless alloy steel tubing
The preparation method includes: billet smelting, which involves smelting, refining, vacuum degassing, and continuous casting of round tube billets; annealing treatment, which involves subjecting the billet to high-temperature diffusion annealing or low-temperature isothermal annealing; and periodic tube rolling, which undergoes The annealed billet is soaked, and the billet is hot-rolled, perforated, sized, and cooled after soaking; and heat treatment is performed by heating the cyclically rolled steel pipe to 1040-1080°C, normalizing, cooling, and then heating. to 750 ~ 800℃, tempered, heat-insulated and then cooled to produce seamless steel pipes.
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