Duplex S31803 Seamless Pipe
The ASTM A789 UNS S31803 tubing refers to seamless and welded tubing manufactured in accordance with ASTM A789/ASTM A1789M, which contains approximately 50% ferrite and 50% austenite. The stress corrosion resistance of ASTM A789 in neutral chloride solution and H2S is better than that of 304L, 316L austenitic stainless steel, and 18-5mo type duplex stainless steel. The UNS S31803 tubing is especially suitable for the temperature range of -50°F/+600°F. It may also be considered for applications beyond this temperature range, but there are some limitations, especially when applied to weld structures.
Chemical Composition Requirements
| Chemical composition for ASTM A789 UNS S31803 tubing, % |
| C | ≤0.030 |
| Mn | ≤2.00 |
| P | ≤0.030 |
| S | ≤0.020 |
| Si | ≤1.00 |
| Ni | 4.5-6.5 |
| Cr | 21.0-23.0 |
| Mo | 2.5-3.5 |
| N | 0.08-0.20 |
Mechanical Properties
| Tensile Strength,min. | Yield Strength,min. | Elongation,min. | Hardness Brinell, max |
| Mpa | Mpa | % | HB |
| 620 | 450 | 25 | 290 |
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FAQ:
Q: Are you trading company or manufacturer?
A: We are a professional steel pipes materials manufacturer.
Q: How long is your delivery time?
A: Generally it takes 7-14 days if the goods are in stock or 30-60 days if there is no stock, this mainly depends on quantity.
Q: Do you provide free sampleas?
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<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact us.
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Duplex S31803 Seamless Pipe Suppliers Images
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