Round stainless steel pipe heat treatment
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ASTM A376 TP304, TP304H, TP304N, TP304LN, TP316 Seamless Austenitic Stainless Steel Tubes/Pipes For High-Temperature Service
Material Specification
| Parameter | Description |
|---|---|
| Standard | ASTM A376 |
| Product Form | Seamless Tubes/Pipes |
| Alloy Type | Austenitic Stainless Steel |
| Common Grades | TP304, TP304H, TP304N, TP304LN, TP316 |
Key Features
- High-Temperature Resistance: Excellent performance under prolonged exposure to high temperatures.
- Corrosion Resistance: Superior resistance to oxidation, pitting, and intergranular corrosion.
- Mechanical Strength: Maintains strength and ductility at elevated temperatures.
- Versatility: Suitable for both internal and external pressure applications.
- Weldability: Excellent weldability using standard fusion welding methods.
Chemical Composition
| Grade | C | Si | Mn | P | S | Ni | Cr | Mo | N |
|---|---|---|---|---|---|---|---|---|---|
| TP304 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 8.00–10.5 | 18.00–20.00 | – | – |
| TP304H | ≤0.04 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 8.00–10.5 | 18.00–20.00 | – | – |
| TP304N | ≤0.10 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 8.00–10.5 | 18.00–20.00 | – | ≥0.10 |
| TP304LN | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.035 | ≤0.030 | 8.00–10.5 | 18.00–20.00 | – | ≥0.10 |
| TP316 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 10.00–14.00 | 16.00–18.00 | 2.00–3.00 | – |
Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| TP304 | ≥515 | ≥205 | ≥40 | ≤187 |
| TP304H | ≥515 | ≥205 | ≥40 | ≤187 |
| TP304N | ≥515 | ≥205 | ≥40 | ≤187 |
| TP304LN | ≥515 | ≥205 | ≥40 | ≤187 |
| TP316 | ≥515 | ≥205 | ≥40 | ≤187 |
Steel Grade
The steel grades covered under ASTM A376 include:
- TP304: Standard grade with balanced carbon and chromium content.
- TP304H: Higher carbon content for enhanced strength.
- TP304N: Nitrogen-alloyed grade for improved creep resistance.
- TP304LN: Low-carbon, nitrogen-alloyed grade for superior corrosion resistance.
- TP316: Molybdenum-alloyed grade for enhanced pitting corrosion resistance.
Application
These materials are widely used in:
- Heat exchangers
- Boilers
- Steam lines
- Petrochemical piping systems
- Power plants
- Oil refineries
Possible Alternate Grades
- TP309S: High-temperature resistant grade with higher chromium and nickel content.
- TP310S: Superior oxidation resistance compared to TP304.
- TP321: Titanium-stabilized grade for improved intergranular corrosion resistance.
- TP347: Stabilized grade for high-temperature applications.
Q: Are you trading company or manufacturer ?
A: manufacturer,also can do trading.
Q: How long is your delivery time?
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
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Main Product:
Seamless Steel Tubes,
Welded Precision Steel Pipes ,
Automotive Steel Tubes,
Carbon steel tubes,
Stainless Steel Tubes,
Special Shaped Steel Tubes
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