S304 Stainless Steel Pipe
1. Standard: ASTM A312、ASME SA312
2. Size: 1/8''~30''NB
3. Thickness: SCH5~SCHXXS
4. End: Beveled End, Plain End
HT PIPE is a S304 stainless steel pipe supplier with 15+ export experience. Contact us for more information and quotes for free!
S304 stainless steel pipe is an austenitic grade belonging to the 18/8 chromium-nickel family. The nominal composition sits around 18% chromium and 8% nickel, which gives it solid corrosion resistance in general environments and decent formability.
The UNS designation is S30400. In European standards, it's 1.4301. One more variant worth knowing: 304L stainless steel pipe (UNS S30403) carries the same chromium-nickel base but limits carbon to 0.03% max instead of 0.08%. The "L" stands for low carbon, and it matters if the pipe will be welded.
We offers 304 stainless steel in a variety of forms, including:
- Bar
- Wire
- Sheet
- Plate
- Forgings
- Pipe fittings
- Flanges
- Seamless & Welded pipe
- Seamless Tube & Welded tube
- Weld Rod
ASTM A312 TP304 Stainless Steel Pipe Specifications
| Specifications | ASTM A 312/ASME SA 312 |
| Dimensions | ASTM, ASME and API |
| SS 304 Pipes | 1/2″ NB – 16″ NB |
| ERW 304 Pipes | 1/2″ NB – 24″ NB |
| EFW 304 Pipes | 6″ NB – 100″ NB |
| Size | 1/8″NB TO 30″NB IN |
| Schedule | SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH60, SCH80, XS, SCH120, SCH140, SCH160, XXS |
| Type | Seamless / ERW / Welded / Fabricated / LSAW Pipes |
| Form | Round Pipes, Custom Pipes, Square Pipes, Rectangular Pipe, "U" Shape, Hydraulic Pipes |
| Length | Single Random, Double Random & Cut Length. |
| End | Plain End, Beveled End, Treaded |
| Property | Value |
|---|---|
| Chromium | 18.0–20.0% |
| Nickel | 8.0–12.0% |
| Carbon (304) | ≤0.08% |
| Carbon (304L) | ≤0.03% |
| PREN | ~19–20 |
| Tensile Strength | ≥515 MPa |
| Yield Strength | ≥205 MPa |
| Elongation | ≥35% |
Seamless vs Welded: The Difference Isn't Just Price
Seamless 304 stainless steel pipe is made by piercing a solid billet and elongating it over a mandrel. No weld seam means no weak point. The pressure rating is higher, the wall thickness is more consistent, and the inside surface is smoother.
Welded 304 stainless steel pipe starts as a flat strip that's formed into a tube and welded along the seam. Modern mills produce welded pipe that meets ASTM A312 tolerances, and for many applications-plumbing, architectural, low-pressure process work-it's perfectly adequate. The price difference is real (seamless typically runs 20–40% higher), so there's no point paying for it when you don't need it.
Applications: Where 304 Shows Up
304 stainless steel pipe covers a wide range of uses:
Water and plumbing systems in commercial and residential construction
Food and beverage processing (where sanitary standards apply)
Chemical storage and process piping in low-chloride environments
Architectural trim and handrails
Heat exchangers and boiler tubes (often 304L for weldability)
Oil and gas auxiliary systems where chloride exposure is limited
HVAC and mechanical engineering
FAQ
Q: About s304 stainless steel pipe prices?
A: Prices from ranges $5 - $15 per kilogram, vary depending on size, wall thickness, supplier etc.
Q: How long does your delivery time take?
A: Delivery time is within 5-21 days
Q: Is There Sample Service?
A: Samples Are Provided Free Of Charge
Q: What Is The Minimum Order Quantity?
A: No Minimum Order Quantity
Q: How to pack the products?
A: The inner layer has a waterproof paper outer layer and is fixed with a fumigation wooden pallet.
Q: Exported Countries
A: Brazil, South Africa, Indonesia, India, Singapore, Malaysia, Iran, Russia, UAE, Chile, Laos, etc
Q: Can we visit your factory?
A: Of course, you are always welcome!
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