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GB/T 21832.2 is a Chinese national standard that specifies the requirements for welded ferritic duplex stainless steel tubes and pipes used for fluid transport. This standard covers various materials, specifications, chemical compositions, mechanical properties, and applications of these stainless steel tubes and pipes.
The material used in accordance with GB/T 21832.2 includes the following grades:
These grades are specifically designed to exhibit excellent corrosion resistance, high strength, and good weldability, making them suitable for various fluid transport applications.
GB/T 21832.2 provides detailed specifications for the dimensions, tolerances, and technical requirements of welded ferritic duplex stainless steel tubes and pipes. These specifications ensure the proper functioning and durability of the tubes and pipes in fluid transport systems.
The chemical composition of the ferritic duplex stainless steel grades mentioned in GB/T 21832.2 is as follows:
| Grade | C | Si | Mn | P | S | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|---|
| S21953 | 0.03 | 1.00 | 2.00 | 0.035 | 0.015 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
| S22253 | 0.03 | 1.00 | 2.00 | 0.035 | 0.015 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | 0.14-0.20 |
| S22053 | 0.03 | 1.00 | 2.00 | 0.035 | 0.015 | 21.5-24.0 | 5.5-7.5 | 2.5-3.5 | 0.10-0.22 |
| S23043 | 0.03 | 1.00 | 2.00 | 0.035 | 0.015 | 22.0-24.0 | 3.0-5.5 | 0.10-0.60 | 0.10-0.30 |
| S22553 | 0.03 | 1.00 | 2.00 | 0.035 | 0.015 | 24.0-26.0 | 4.5-6.5 | 2.9-3.9 | 0.10-0.25 |
The mechanical properties of the ferritic duplex stainless steel grades specified in GB/T 21832.2 are as follows:
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| S21953 | ≥620 | ≥450 | ≥25 | ≤290 |
| S22253 | ≥620 | ≥450 | ≥25 | ≤290 |
| S22053 | ≥620 | ≥450 | ≥25 | ≤290 |
| S23043 | ≥620 | ≥450 | ≥25 | ≤290 |
| S22553 | ≥620 | ≥450 | ≥25 | ≤290 |
The welded ferritic duplex stainless steel tubes and pipes specified in GB/T 21832.2 find extensive application in various fluid transport systems. These systems include but are not limited to:
The excellent corrosion resistance, high strength, and good weldability of these stainless steel tubes and pipes make them ideal for handling corrosive fluids and operating in demanding environments.
A: manufacturer,also can do trading.
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.
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
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