ASTM A213/ASME SA213
TP347H Seamless Steel Tubes
ASTM A213/ASME SA213 TP347H Seamless Steel Tubes
Short Description:
ASTM A213 ASME SA-213 TP347H Seamless Steel Tubes can be used in high temperature and high pressure environment, with the maximum operating temperature of 650 ℃ for pressure parts and 850 ℃ for oxidation resistant parts.
ASTM A213 ASME SA-213 TP347H Seamless Steel Tubes contains NB-Cr-Ni austenitic stainless steel. Because of the stable element Nb, it has good intergranular corrosion resistance, high endurance strength and oxidation resistance, as well as good technological properties such as bending and welding. Its comprehensive performance is better than ASTM A213 ASME SA-213 TP304H.
Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes.
Material: TP347H, S34709
Equivalent Material: 07Cr18Ni11Nb, X7CrNiNb18-10, SUS 347H TB
Chemistry Composition of ASTM A213 ASME SA-213 TP347H
| C, % | Si, % | Mn, % | P, % | S, % | Cr, % | Ni, % | Nb, % |
| 0.04-0.10 | 1.00 max | 2.00 max | 0.045 max | 0.030 max | 17.0-19.0 | 9.0-13.0 | 8*C-1.1 |
Mechanical Properties of ASTM A213 ASME SA-213 TP347H
| Tensile Strength , MPa | Yield Strength, MPa | Elongation, % | Hardness, HB |
| 515 min | 205 min | 35 min | 192 max |
Outside Diameter & Tolerance
| Hot rolled | Outside Diameter, mm | Tolerance, mm |
| OD≤101.6 | +0.4/-0.8 | |
| 101.6＜OD≤190.5 | +0.4/-1.2 | |
| 190.5＜OD≤228.6 | +0.4/-1.6 | |
| Cold Drawn | Outside Diameter, mm | Tolerance, mm |
| OD＜25.4 | ±0.10 | |
| 25.4≤OD≤38.1 | ±0.15 | |
| 38.1＜OD＜50.8 | ±0.20 | |
| 50.8≤OD＜63.5 | ±0.25 | |
| 63.5≤OD＜76.2 | ±0.30 | |
| 76.2≤OD≤101.6 | ±0.38 | |
| 101.6＜OD≤190.5 | +0.38/-0.64 | |
| 190.5＜OD≤228.6 | +0.38/-1.14 |
| Hot rolled | Outside Diameter, mm | Tolerance, % |
| OD≤101.6, WT≤2.4 | +40/-0 | |
| OD≤101.6, 2.4＜WT≤3.8 | +35/-0 | |
| OD≤101.6, 3.8＜WT≤4.6 | +33/-0 | |
| OD≤101.6, WT>4.6 | +28/-0 | |
| OD>101.6, 2.4＜WT≤3.8 | +35/-0 | |
| OD>101.6, 3.8＜WT≤4.6 | +33/-0 | |
| OD>101.6, WT>4.6 | +28/-0 | |
| Cold Drawn | Outside Diameter, mm | Tolerance, % |
| OD≤38.1 | +20/-0 | |
| OD>38.1 | +22/-0 |
Requirements for heat treatment and grain size of sa-213 TP347H seamless steel tube
| Grade | Heat treatment | Solution treatment temperature,℃ | Cooling medium | ASTM grain size class number |
| SA-347H | solution treatment. | Cold working(1100℃) Hot working（1050℃） | Water cooling or rapid cooling | 7 |
Inspection & Test:
Chemistry composition,
Tensile test,
Hardeness test,
Flattening test,
Flaring test,
NDT,
Surface inspection and dimension check.
Application of sa-213 TP347H seamless steel pipe
Allowable service temperature:A213, SA-213 TP347H seamless steel pipe can be used in high temperature and high pressure environment, with the maximum operating temperature of 650℃ for pressure parts and 850℃ for oxidation resistant parts.
Applicable conditions: A213, SA-213 TP347H stainless steel pipe is mainly used for making high temperature superheater, high temperature reheater, high temperature section of platen superheater and various high temperature and high pressure resistant pipe fittings and other components on large power generation boiler with subcritical and supercritical pressure parameters.
Use guide:
The sa-213tp347h material used in the boiler is austenitic stainless steel with crystallographic structure. It is specially believed in the industry that the service temperature of TP347H material can reach more than 650 ° C, and the high temperature oxidation resistance temperature of the support is only 595 ° C. Therefore, after sa-213tp347h is widely used in supercritical units, the oxide skin produced in sa-213tp347h pipe will fall off, which is very easy to cause tube plugging and tube explosion. It is suggested that sa-213tp347hfg inner wall shot peening (sb) can be upgraded to fine grain.
Selection of A213, SA-213 TP347H welding material
The welding performance is good (the welding joint can pass the l-method intergranular corrosion test). When welding the same kind of steel, the manual welding electrode shall be ao 102, Ao 107, Ao 132 or e308-15 (American brand); the argon arc welding wire shall be er-347; if the welding is carried out with different kinds of steel with ferritic materials, the welding wire or electrode of ernicr3 or enicrfe-3 type specified in ASME standard is recommended. After welding, the boiler pipe shall be subject to solution treatment at 1180 ℃ for 30 minutes.
Photos of ASTM A213 TP347H Seamless Steel Tubes
