Steel Pipe Austenitic Stainless Steel Pipe ASTM A312 TP304/304L Steel Tube

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Detailed Product Description

Steel Pipe Austenitic Stainless Steel Pipe ASTM A312 TP304/304L Steel Tube

Product Description

Specifications

Austenitic Stainless Steel Pipe (ASTM A312 TP304/304L)

1. Standard: ASTM A312 / ASME SA312, DIN, JIS, GB, EN

2. OD: 6-600mm

3. Wall Thickness: 1-30mm (Schedule 5S – XXS)

4. Length: 2-12m (custom available)

5. Surface: Bright Annealed / Pickled & Passivated / Polished / Sandblasted

Chemical Composition (TP304 / TP304L)

Chemical Composition (TP316 / TP316L)

Density

Melting Range

Mechanical Properties (Typical)

Characteristics as Below

1. Excellent corrosion resistance – resists oxidation and rust in wet and chemical environments

2. Good mechanical properties – high strength and ductility at room and elevated temperatures

3. Excellent weldability – suitable for TIG, MIG, and resistance welding without preheating

4. Good formability – easily bent, formed, and fabricated using standard shop equipment

5. Non-magnetic structure – austenitic grain structure provides low magnetic permeability

6. Excellent low-temperature toughness – retains impact resistance down to cryogenic temperatures

7. Good high-temperature oxidation resistance – up to 870°C (1600°F) for intermittent service

8. Hygienic surface – smooth, non-porous finish resists bacterial growth (food/pharma grade)

Metallurgical Structure

Austenitic stainless steels (TP304/304L) have a face-centered cubic (FCC) crystal structure. The high chromium and nickel content stabilizes the austenitic phase, making the material non-magnetic and providing excellent toughness. The low carbon content (TP304L) minimizes carbide precipitation (sensitization) during welding, ensuring good corrosion resistance in the heat-affected zone. The molybdenum in TP316/316L enhances resistance to pitting and crevice corrosion in chloride environments.

Corrosion Resistance

Austenitic stainless steel pipes offer excellent resistance to a wide range of corrosive environments:

• General corrosion in atmospheric and wet conditions

• Oxidation and scaling at elevated temperatures

• Intergranular corrosion (particularly TP304L with low carbon)

• Pitting and crevice corrosion (TP316/316L with molybdenum addition)

• Organic and inorganic acid resistance (selectively)

• Stress corrosion cracking resistance (in mild environments)

Application Field

The excellent corrosion resistance, mechanical properties, and formability of austenitic stainless steel pipes make them widely used across numerous industries.

1. Chemical and petrochemical processing – piping for acids, alkalis, and solvents

2. Food and beverage industry – dairy, beer, wine, and juice processing lines

3. Pharmaceutical and biotechnology – clean steam, WFI

4. Oil and gas – offshore platforms, refinery piping, and gas transport

5. Architecture and construction – handrails, structural supports, and building facades

6. Power generation – heat exchanger tubing, condenser tubes, and boiler components

7. Marine engineering – seawater cooling systems and coastal infrastructure

8. Water treatment – desalination plants, water distribution, and wastewater treatment

Our Service

Why Choosing TOBO Metal Industrial:

• Sufficient Forging, Heating, Machining Equipment

• In-house Inspection Instruments for Quality Controlling

• Competitive Price & High Quality Assurance

• Fast, Effective and Efficient Services

• Directly supplier of Danieli Metallurgical Equipment

• Experienced Professionals on Communication

Our Company

1. We are one of the Professional manufacturers & exporters of Pipeline products in China. Our company was established in 1998, the plant covers 550,000 square meters and a construction area of 68,000 square meters, employing 260 workers and 45 technicians.

2. We have five branch factories which can supply the best quality pipes, tubes, fittings, flanges, and related accessories. Now, we own a number of advanced pipe production equipments, including metal processing, forging, machining, cold forming, and hot extrusion with heat treatment processes, producing 60,000 tons of pipe products annually. Our company maintains various detection devices, such as non-destructive testing, chemical analysis, metallographic examination, and physical experiments. Our technical strength is very strong. Main products include stainless steel pipes, fittings, forged socket welding fittings, threaded fittings, and flanges in stainless steel, duplex stainless steel, and alloy steel.

3. In addition, we are authorized by more than 120 top-class mills from South Korea, Japan, and China like JFE, SUMITOMO, POSCO, BAOSTEEL, TISCO, LISCO, TPCO, HENGYANG VALIN, and so on.

Packing & Delivery

1. Packing Details : Regular shipping packaging or depends on customer's requirement

2. Delivery Details : 7-15 days after the PO

FAQ

Q: Are you a trading company or manufacturer?
A: We are a factory.

Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock, or it is 15-20 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 the customer does not pay the cost of freight.

Q: What are your terms of payment?
A: Payment ≤ 1000 USD, 100% in advance. Payment ≥ 1000 USD, 50% T/T in advance, balance before shipment.