Product Description
Chemical Composition
ASTM A213 covers various grades of stainless steel, such as TP304, TP316, etc. Here are the chemical compositions of some common grades (in wt.%):
| Grade |
C |
Mn |
Si |
P |
S |
Cr |
Ni |
Mo |
N |
Other Elements |
| TP304/304L |
≤0.08 |
≤2.00 |
≤1.00 |
≤0.045 |
≤0.030 |
18.0 - 20.0 |
8.0 - 11.0 |
- |
- |
- |
| TP316/316L |
≤0.08 |
≤2.00 |
≤1.00 |
≤0.045 |
≤0.030 |
16.0 - 18.0 |
10.0 - 14.0 |
2.0 - 3.0 |
- |
- |
| TP317/317L |
≤0.08 |
≤2.00 |
≤1.00 |
≤0.045 |
≤0.030 |
18.0 - 20.0 |
11.0 - 15.0 |
3.0 - 4.0 |
- |
- |
| TP347/347H/347HFG |
≤0.08 |
≤2.00 |
≤1.00 |
≤0.045 |
≤0.030 |
17.0 - 19.0 |
9.0 - 13.0 |
- |
- |
Nb: 0.20 |
Mechanical Properties
The typical mechanical properties of some common grades are as follows:
| Grade |
Tensile Strength (MPa) |
Yield Strength (MPa) |
Elongation (%) |
| TP304/304L |
≥515 |
≥205 |
≥35 |
| TP316/316L |
≥515 |
≥205 |
≥35 |
| TP317/317L |
≥515 |
≥205 |
≥35 |
| TP347/347H/347HFG |
≥515 |
≥205 |
≥35 |
| TP444 |
≥485 |
≥275 |
≥20 |
U-Bend Tube are widely used in Heat Exchanger Systems. Heat-Exchanger Equipment on the basis of Seamless Stainless U-Tubes and Welded Stainless U bend Tube is essential in strategically important and critical felds---Nuclear And Petrochemical Machine Building.
Material Characteristics
- Good Corrosion Resistance: The chromium and nickel in the stainless steel form a passive film on the surface, which can resist corrosion from many media. For grades like TP316 and TP317 with molybdenum, they have better resistance to pitting and crevice corrosion in chloride - containing environments.
- High - Temperature Performance: It can maintain stable mechanical and physical properties at high temperatures. For example, TP309S, TP310S, etc. are suitable for high - temperature applications such as furnace parts and heat exchangers1.
- Good Processability: It has good plasticity and can be cold - worked or hot - worked into U - tubes. It also has good weldability, and high - quality welds can be obtained by using appropriate welding processes, which is beneficial for the manufacturing and installation of heat exchangers.
Applications
- TP304/304L: Widely used in heat exchangers, chemical containers, food processing equipment, and piping systems.
- TP316/316L: Commonly used in chemical and petrochemical processing, food processing, pharmaceutical equipment, and marine applications.
- TP317/317L: Mainly used in chemical and petrochemical processing, especially for handling sulfuric acid compounds, and in the pulp and paper industry and food processing equipment.
- TP347/347H/347HFG: Suitable for high - temperature applications such as aircraft exhaust stacks and manifolds, heat exchangers, and chemical processing.
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