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304 Stainless Steel Pipe — Seamless & Welded | Supplier Price

Seamless & welded 304 stainless steel pipes — all sizes available

✓ Direct factory price
✓ MOQ from 1 Ton
✓ Lead time: 7-15 days
✓ ISO 9001 & CE certified
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Grade: 304 AISI 304 ASTM A240 / A312 EN 1.4301
304 Stainless Steel Pipe — Seamless & Welded | Supplier Price

What is 304 Stainless Steel Pipe / Tube?

304 stainless steel is the most widely used austenitic stainless steel, known for excellent corrosion resistance, good formability, and weldability. It contains 18-20% chromium and 8-10.5% nickel.

304 stainless steel pipe is one of our core products, available in both seamless and welded construction for a wide range of industrial and architectural applications.

Manufactured to ASTM A312, ASTM A213, and ASTM A269 standards, our 304 pipes offer excellent corrosion resistance, good weldability, and reliable performance across diverse operating conditions.

Specifications & Dimensions

Seamless and welded stainless steel pipes for industrial, architectural and decorative applications.

Outer Diameter 6.0 mm - 630 mm (1/4" - 24")
Wall Thickness 0.5 mm - 40 mm (Sch 5S - Sch XXS)
Standard Length 6m (20ft) standard; random length; cut to length available
Standards ASTM A312 (Seamless & Welded) | ASTM A213 (Seamless Boiler Tube) | ASTM A269 (Seamless & Welded Tube) | ASTM A270 (Sanitary Tube) | EN 10216-5 / 10217-7 | JIS G3459 / G3463 | GB/T 14976 / 13296
Product Types Seamless Pipe (Seamless Tube) · Welded Pipe (ERW / EFW / TIG welded) · Precision / Instrumentation Tube · Decorative Tube (Round / Square / Rectangular) · Capillary Tube
Available Grades 304 / 304L / 316 / 316L / 321 / 310S / 201 / 2205 (duplex) / 904L

Standard Sizes & Weight Chart

Reference sizes and theoretical weights. Custom sizes available upon request.

Nominal SizeOD (mm)Wall (mm)WeightNote
1/2" Sch 4021.3 mm2.77 mm~1.28 kg/mStandard schedule 40
1" Sch 4033.4 mm3.38 mm~2.5 kg/mStandard schedule 40
2" Sch 4060.3 mm3.91 mm~5.5 kg/mStandard schedule 40
3" Sch 4088.9 mm5.49 mm~11.5 kg/mStandard schedule 40
4" Sch 40114.3 mm6.02 mm~16.2 kg/mStandard schedule 40
6" Sch 40168.3 mm7.11 mm~28.4 kg/mStandard schedule 40
8" Sch 40219.1 mm8.18 mm~42.5 kg/mStandard schedule 40

Chemical Composition (%)

Chemical composition of 304 grade, in accordance with relevant standards.

ElementRange / Max
Carbon (C)Max: 0.08%
Chromium (Cr)18.0 - 20.0%
Nickel (Ni)8.0 - 10.5%
Manganese (Mn)Max: 2.00%
Silicon (Si)Max: 1.00%
Phosphorus (P)Max: 0.045%
Sulfur (S)Max: 0.030%

Mechanical Properties

Typical mechanical properties of 304 at room temperature.

PropertyValue
Tensile Strength (min)515 MPa (75,000 psi)
Yield Strength (0.2% offset, min)205 MPa (30,000 psi)
Elongation (in 50mm, min)40%
Hardness (max)HRB 92 / HB 201

Applications of 304 Steel

304 steel is widely used in the following industries and applications:

  • Food processing equipment
  • Kitchen appliances and utensils
  • Chemical containers and piping
  • Architectural trim and handrails
  • Medical devices
  • Brewery and dairy equipment

Why Choose SteelPartner as Your Supplier?

Direct Factory Price

We own our manufacturing facilities, ensuring competitive pricing without middlemen markup.

Rigorous Quality Control

Every batch undergoes 3-stage inspection: raw material, production, and final testing with full test reports.

Fast Global Delivery

Standard orders ship within 7-15 days. Well-established logistics network to major ports worldwide.

Custom Processing

Cutting, bending, welding, polishing, and surface treatment available according to your drawings.

Flexible MOQ

Minimum order from 1 ton for standard products. Trial orders welcome for new customers.

24/7 Service

Dedicated sales engineer assigned to each order. Quick response via email, phone, and WhatsApp.

Frequently Asked Questions

What types of 304 stainless steel pipes do you supply?
We supply both seamless 304 pipes (ASTM A312 / A213) and welded/ERW 304 pipes (ASTM A312 / A269). Also available: precision tubes, decorative tubes, square tubes, and rectangular tubes.
What sizes of 304 pipe are available?
Outer diameter ranges from 6mm (1/4") to 630mm (24"). Wall thickness from 0.5mm to 40mm. Standard length is 6 meters (20ft), cut-to-length available.
What's the difference between seamless and welded pipe?
Seamless pipe is made from a solid billet pierced and rolled without a weld seam, offering higher pressure rating and uniformity. Welded (ERW) pipe is made from strip rolled and welded, generally lower cost for similar applications where pressure is not extreme.
What are 304 stainless steel pipes used for?
Common applications include food and beverage processing, chemical handling, water treatment, architectural railings, furniture tubing, heat exchangers, and general industrial piping.
Can 304 pipe be used for drinking water?
Yes, 304 stainless steel is safe for potable water applications and is widely used in plumbing and water treatment systems. It meets NSF/ANSI 61 standards for drinking water system components.
What pressure rating does 304 pipe have?
Pressure rating depends on pipe size, wall thickness, and temperature. For example, Schedule 40 304 seamless pipe can typically handle up to 140-200 bar at room temperature. We can calculate exact ratings for your application.
Do you provide pickled and passivated pipe?
Yes, our seamless pipes are typically supplied pickled and passivated (annealed & pickled finish). Welded pipes can be supplied with polished interior or exterior as required.
How is 304 pipe packaged for shipping?
Pipes are bundled and secured with steel straps, with end caps to protect threads/openings. For export, we use seaworthy packaging with wooden pallets or crates as needed.

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