The A312 TP 321/321H stainless steel tubes are a type of tubing widely used in various industrial applications. These tubes are crafted from stainless steel, a corrosion-resistant alloy known for its durability and strength. The "A312" designation refers to the ASTM A312 standard, which outlines the specifications for seamless, welded, and heavily cold worked austenitic stainless steel pipes.The "TP 321/321H" designation indicates the specific grade of stainless steel used in these tubes. Stainless steel grade 321 is a stabilized version of 304, primarily containing titanium to prevent carbide precipitation during welding, which could lead to intergranular corrosion.
Grade 321H is a higher carbon version of 321, designed for high-temperature applications. These tubes find application in a range of industries including petrochemical, chemical, food processing, and more. They are especially valued for their resistance to high temperatures and corrosive environments. Their seamless construction ensures minimal weak points, while their welded counterparts are suitable for less demanding environments.
A312 TP 321/321H stainless steel tubes are often used in processes involving fluids or gases that require a high level of purity and resistance to corrosion. Their properties make them well-suited for use in heat exchangers, boiler tubes, superheaters, and other components in demanding industrial settings. It's important to note that proper installation and maintenance are crucial to ensure the longevity and effectiveness of these tubes in service.
Largest Inventory
Customer Support
On Time Deliveries
ISO 9001 : 2015 Certified
Specification:
| Specification | A312 TP 321/321H Stainless Steel Tubes |
| Standard | ASTM A312 |
| Material Grade | 321 (TP 321), 321H (TP 321H) |
| Type | Seamless and Welded |
| Size Range | 1/8" - 24" (Nominal Pipe Size) |
| Wall Thickness Range | SCH 5S - SCH XXS |
| Manufacturing Process | Hot Finished or Cold Finished |
| Surface Finish | Annealed and Pickled, Polished |
| Temperature Range | Up to 1500°C (2732°F) for 321H |
| Corrosion Resistance | Excellent in Corrosive Environments |
| Applications | Petrochemical, Chemical, Food Processing, High-Temperature Environments, Heat Exchangers, Boiler Tubes, Superheaters, etc. |
| Weldability | Good, Avoids Intergranular Corrosion |
Chemical Composition ASTM A312 TP 321/321H STAINLESS STEEL TUBES
| null | null | |
| Element | Composition Range (WT%) for TP 321 | Composition Range (WT%) for TP 321H |
| Carbon (C) | 0.08 max | 0.04 - 0.10 |
| Manganese (Mn) | 2.00 max | 2.00 max |
| Phosphorus (P) | 0.045 max | 0.045 max |
| Sulfur (S) | 0.030 max | 0.030 max |
| Silicon (Si) | 0.75 max | 0.75 max |
| Chromium (Cr) | 17.0 - 19.0 | 17.0 - 19.0 |
| Nickel (Ni) | 9.0 - 12.0 | 9.0 - 12.0 |
| Titanium (Ti) | 5 x (C+N) min, 0.70 max | 4 x (C+N) min, 0.70 max |
| Nitrogen (N) | 0.10 max | 0.10 max |
Mechanical Properties of ASTM A312 TP 321/321H STAINLESS STEEL TUBES
| Property | TP 321 | TP 321H |
| Tensile Strength | ≥ 515 MPa (75,000 psi) | ≥ 515 MPa (75,000 psi) |
| Yield Strength (0.2% offset) | ≥ 205 MPa (30,000 psi) | ≥ 205 MPa (30,000 psi) |
| Elongation | ≥ 40% | ≥ 40% |
| Hardness (Brinell) | ≤ 217 HB | ≤ 217 HB |
| Impact Toughness | -20°C (-4°F), ≥ 80 J (59 ft-lbf) | -20°C (-4°F), ≥ 80 J (59 ft-lbf) |
| -196°C (-321°F), ≥ 130 J (96 ft-lbf) | -196°C (-321°F), ≥ 130 J (96 ft-lbf) | null |
Advantages of ASTM A312 TP 321/321H STAINLESS STEEL TUBES:
- Good general corrosion resistance and high strength
- Good sulfide stress corrosion resistance
- Resistance to chloride pitting and crevice corrosion
- Higher resistance to chloride stress corrosion cracking
- Easy to weld and conform
Some of Our Specialities that make us a profitable Business Partner for our clients are :
- Customer focused approach
- Superior quality products
- Timely deliverices
- Customize Size & Specification
- Competitive Pricing
Applications Industry
| Pharmaceutical Equipment | Chemical Equipment |
| Sea Water Equipment | Heat Exchangers |
| Heat Exchangers | Gas Processing |
| Condensers | Specialty Chemicals |
| Pulp and Paper Industry | Pharmaceuticals |
We supply Pipes, Tubes & Fittings Worldwide.
Exporting Steel Pipes & Tubes to over 60 countries including Afghanistan, Albania, Andorra, Angloa, Austria, Australia, Bahrain, Bangladesh, Bhutan, Brazil, Brunei, Belarus, Belgium, Bulgaria, Cambodia, China, Cyprus, Croatia, Czech Republic, Canada, Denmark, Estonia, Egypt, Finland, France, Germany, Greece, Georgia, Hungary, Iceland, Ireland, Italy, Indonesia, Iran, Iraq, Israel, Japan, Jordan, Kazakhstan, Kuwait, Kyrgyzstan, Lebanon, Latvia, Latin America, Liechtenstein, Lithuania, Luxembourg, Malta, Madagascar, Mexico, Moldova, Monaco, Malaysia, Maldives, Mongolia, Myanmar (Burma), Nepal, New Zealand, North Korea, Netherlands, Norway, Nigeria, Oman, Poland, Portugal, Pakistan, Palestine, Philippines, Qatar, Russia, Romania, Russia, San Marino, Serbia and Montenegro, Slovakia, Slovenia, Spain, Sweden, Switzerland, Saudi Arabia, Singapore, South Korea, South Africa, Sri Lanka, Sudan, Syria, Taiwan, Tanzania, Tajikistan, Thailand, Turkey, Turkmenistan, Ukraine, United Kingdom, United Arab Emirates (UAE), Uzbekistan, Venezuela, Vietnam, Yemen, etc.