Stainless Steel 304 Pipes & Tubes Supplier, Exporter & Stockist in India
Stainless Steel 304 Pipe is an austenitic, 18% chromium / 8% nickel stainless steel pipe manufactured to ASTM A312 TP304 and ASME SA312, available in seamless,welded, ERW (electric resistance welded) and EFW (electric fusion welded) construction from ½" to 24" NB. The grade UNS S30400, WERKSTOFF 1.4301 is valued for strong corrosion resistance, excellent formability and weldability, and a hygienic, non-reactive surface.SS 304 pipes and tubes are used in food and beverage processing, chemical and pharmaceutical
plants, architectural and construction work, and general industrial and water-treatment piping. Amardeep Steel Centre stocks SS 304 pipe and tube in Mumbai and exports worldwide with EN 10204 3.1 mill test certificates and IBR documentation on request.
What is Stainless Steel 304 Pipe?
Stainless steel 304 pipe is the most widely specified grade of austenitic stainless steel pipe in industrial use. Its composition roughly 18–20% chromium and 8–10.5% nickel gives it a stable chromium-oxide passive layer that resists a broad range of corrosive media, which is why the grade is informally called "18/8 stainless steel." SS 304 pipes combine that corrosion resistance with low-carbon-steel-like formability, good weldability without special filler requirements in most cases, and a clean, hygienic surface finish, making them the default choice across food processing, chemical handling, architecture, and general fabrication wherever a fully exotic alloy is not required.
ASTM A312 TP304 Pipe Specification Overview
ASTM A312 is the governing US specification for seamless and welded austenitic stainless steel pipe intended for high-temperature and general corrosive service; its ASME-mirrored equivalent is ASME SA312. Within A312, TP304 designates standard-carbon Grade 304, while TP304L designates the low-carbon variant. A312 covers both seamless and welded (including ERW) construction and is the standard most buyers mean when they ask for ASTM A312 TP304 pipe. Heavier-wall plate-rolled and large-diameter welded pipe is instead covered under ASTM A358 / ASME SA358. See also: Stainless Steel Pipes & Tubes (all grades).
Stainless Steel 304 Pipe Specifications
|
Property |
Value |
|
Standards |
ASTM A312, ASME SA312 / ASTM A358, ASME SA358 |
|
Dimension Standards |
ASTM, ASME, API |
|
Seamless Pipe Size Range |
½" NB – 16" NB |
|
ERW Pipe Size Range |
½" NB – 24" NB |
|
EFW Pipe Size Range |
6" NB – 100" NB |
|
Overall Size Range Stocked |
⅛" NB – 30" NB |
|
Schedule |
5S, 10S, 40S, 80S, SCH 10, STD, SCH 40, SCH 80, XS, SCH 60, SCH 120, SCH 140, SCH 160, XXS |
|
Type |
Seamless / ERW / Welded / EFW / LSAW / Fabricated |
|
Form |
Round, Square, Rectangular, Hydraulic |
|
Length |
Single random, double random, cut length |
|
End Finish |
Plain end, beveled end, threaded |
SS 304 Chemical Composition
|
Grade |
C max |
Mn max |
Si max |
P max |
S max |
Cr |
Ni |
|
TP304 |
0.08% |
2.0% |
0.75% |
0.045% |
0.030% |
18.0–20.0% |
8.0–10.5% |
|
TP304L |
0.030% |
2.0% |
0.75% |
0.045% |
0.030% |
18.0–20.0% |
8.0–12.0% |
- UNS Designation: S30400 (304) / S30403 (304L).
- Werkstoff Nr.: 1.4301 (304) / 1.4307 (304L).
- JIS: SUS 304.
Mechanical Properties of Stainless Steel 304 Pipes & Tubes
|
Grade |
Tensile Strength (min, MPa) |
Yield Strength 0.2% (min, MPa) |
Elongation (min, %) |
Hardness (HRB max) |
|
TP304 / TP304L |
515 |
205 |
35–40 |
92 |
Recommended solution-annealing / heat-treatment temperature: approximately 1040°C (1900°F), followed by rapid cooling. Maximum continuous service temperature in oxidizing atmospheres is approximately 870°C; mechanical strength is best retained below roughly 550°C, above which TP304H is recommended for sustained high-temperature pressure service.
Physical Properties of Stainless Steel 304 Tubes
|
Grade |
Density (kg/m³) |
Elastic Modulus (GPa) |
Mean Thermal Exp 0–100°C (μm/m·°C) |
Thermal Conductivity at 100°C (W/m·K) |
Specific Heat 0–100°C (J/kg·K) |
Electrical Resistivity (nΩ·m) |
|
304 / 304L |
8,000 |
193 |
17.2 |
16.2 |
500 |
720 |
SS 304 Pipe Size Chart in MM — 304 Stainless Steel Tube Sizes
SS 304 pipe dimensions are governed by NPS (nominal pipe size, in inches) or DN (nominal diameter, in mm) combined with a schedule designation that fixes wall thickness. Outside diameter (OD) is constant for a given NPS regardless of schedule; only wall thickness — and therefore bore and weight — changes between schedules. The table below serves as the definitive ss 304 pipe size chart in mm and covers all 304 stainless steel tube sizes stocked. Amardeep stocks the full schedule range from light-wall 5S through heavy-wall XXS across ⅛" to 30" NB.
|
NPS |
OD (mm) |
Schedule |
Wall Thickness (mm) |
|
¼" |
13.72 |
10S / 40S / 80S |
1.65 / 2.24 / 3.02 |
|
⅜" |
17.15 |
10S / 40S / 80S |
1.65 / 2.31 / 3.20 |
|
½" |
21.34 |
10S / 40S / 80S |
2.11 / 2.77 / 3.73 |
|
¾" |
26.67 |
10S / 40S / 80S |
2.11 / 2.87 / 3.91 |
|
1" |
33.40 |
10S / 40S / 80S |
2.77 / 3.38 / 4.55 |
|
1¼" |
42.16 |
10S / 40S / 80S |
2.77 / 3.56 / 4.85 |
|
1½" |
48.26 |
10S / 40S / 80S |
2.77 / 3.68 / 5.08 |
|
2" |
60.33 |
10S / 40S / 80S |
2.77 / 3.91 / 5.54 |
|
2½" |
73.03 |
10S / 40S / 80S |
3.05 / 5.16 / 7.01 |
|
3" |
88.90 |
10S / 40S / 80S |
3.05 / 5.49 / 7.62 |
|
4" |
114.30 |
10S / 40S / 80S |
3.05 / 6.02 / 8.56 |
|
6" |
168.28 |
10S / 40S / 80S |
3.40 / 7.11 / 10.97 |
|
8" |
219.08 |
10S / 40S / 80S |
3.76 / 8.18 / 12.70 |
|
10" |
273.05 |
10S / 40S / 80S |
4.19 / 9.27 / 12.70 |
|
12" |
323.85 |
10S / 40S / 80S |
4.57 / 9.53 / 12.70 |
|
16" |
406.40 |
10S / 40S |
4.78 / 9.53 |
|
20" |
508.00 |
20 STD / 30 XHY |
9.53 / 12.70 |
|
24" |
609.60 |
20 STD / 40 |
9.53 / 12.70 |
Sizes above 16" NB are typically supplied as EFW/LSAW welded pipe per ASTM A358 / ASME SA358.
SS 304 Pipe Weight Chart — Per-Metre Weights by Schedule
The ss 304 pipe weight chart below lists per-metre weights for common NPS sizes at SCH 40 / 40S. Weight per metre is calculated from OD and wall thickness using standard stainless steel density (8,000 kg/m³). Use the kg/m figure to convert any per-metre quotation to a per-kg basis for comparison. For a full 304 stainless steel pipe price list based on your exact size and quantity, contact our sales team.
|
NPS |
OD (mm) |
Schedule |
Wall (mm) |
Weight (kg/m) |
|
½" |
21.34 |
SCH 40S |
2.77 |
1.29 |
|
¾" |
26.67 |
SCH 40S |
2.87 |
1.71 |
|
1" |
33.40 |
SCH 40S |
3.38 |
2.54 |
|
1½" |
48.26 |
SCH 40S |
3.68 |
4.11 |
|
2" |
60.33 |
SCH 40S |
3.91 |
5.52 |
|
3" |
88.90 |
SCH 40S |
5.49 |
11.47 |
|
4" |
114.30 |
SCH 40S |
6.02 |
16.32 |
|
6" |
168.28 |
SCH 40S |
7.11 |
28.69 |
|
8" |
219.08 |
SCH 40S |
8.18 |
43.20 |
|
10" |
273.05 |
SCH 40 |
9.27 |
63.30 |
|
12" |
323.85 |
SCH 40 |
9.53 |
79.73 |
Available Types of SS 304 Pipe & SS 304 Tube
- SS 304 seamless pipe: Extruded/drawn from a solid billet with no longitudinal weld; preferred for higher-pressure, hygienic, and IBR-certified service. See SS Seamless Pipes & Tubes.
- Welded / ERW SS 304 pipe: Rolled strip welded longitudinally; the most cost-effective option for general process and moderate-pressure service. See SS Welded Pipes & Tubes.
- EFW pipe: Electric fusion welded; used for large-bore pipe (6"–100" NB) where seamless production is impractical.
- LSAW pipe: Longitudinal submerged-arc welded, used for large-diameter, heavy-wall applications.
- Fabricated pipe: Custom rolled and welded to specific large or non-standard dimensions.
Available forms also include round, square, rectangular, and hydraulic-section pipe and tube. SeeASTM A554 Square Tube andASTM A554 Rectangular Tube.
SS 304 Seamless Pipe vs Welded Pipe Comparison
|
Factor |
Seamless SS 304 Pipe |
Welded (ERW) SS 304 Pipe |
|
Construction |
Drawn from solid billet, no weld seam |
Strip rolled and welded longitudinally |
|
Pressure Rating |
Higher, more uniform |
Good, slightly lower than seamless at equal wall |
|
Cost |
Higher |
More economical |
|
Typical Use |
High-pressure, IBR/boiler, hygienic process lines |
General process piping, heat exchangers, structural |
|
Size Range (Amardeep Stock) |
½"–16" NB |
½"–24" NB |
TP304 vs TP304L — Which SS 304 Pipe Grade Do You Need?
|
Factor |
TP304 |
TP304L |
|
Carbon Content |
≤ 0.08% |
≤ 0.030% |
|
Weldability / Post-weld Corrosion Resistance |
Standard |
Better — resists carbide precipitation at the weld zone |
|
Mechanical Strength |
Slightly higher |
Slightly lower |
|
Best Suited For |
General service, no further welding after fabrication |
Pipework that will be field-welded or used in high-purity / welded sanitary lines |
|
Cost |
Standard |
Marginally higher per kg in most markets |
See also: SS 304L Pipes & Tubes | SS 304H Pipes & Tubes | SS 316 Pipes & Tubes.
Manufacturing Process — How SS 304 Pipe & 304 SS Tubing Is Made
SS 304 pipe is produced from hot-rolled or cold-drawn stainless steel billet/strip, formed to size (extrusion or strip-rolling, depending on seamless vs welded route), then solution-annealed at approximately 1040°C and rapidly cooled to restore corrosion resistance and ductility after forming. Pipe is supplied in hot-rolled, cold-drawn, annealed, normalized, or solution-treated condition depending on the application and buyer specification.
Testing & Inspection
Every consignment of stainless steel 304 pipes is dimensionally checked and tested for chemical composition, mechanical properties (tensile, yield, elongation, hardness), and surface/visual defects before dispatch. On request, Amardeep arranges third-party inspection (TPI) and supplies Mill Test Certificates per EN 10204 3.1, along with IBR Form III-D documentation for boiler and pressure-vessel grade material. Additional testing such as PMI, hydrostatic testing, and NDT (radiography/ultrasonic/dye penetrant) can be arranged for project-specific requirements.
Surface Finish Options for 304 Stainless Steel Pipe & Tubing
Mill finish, bright-annealed finish, pickled & passivated finish, polished finish (Grit 120–600), and electropolished finish are all available. Hygienic and architectural projects typically specify polished or electropolished finishes, while general process piping is supplied mill-finish or pickled & passivated. See related:
ASTM A269 Welded Bright Annealed SS Tubing |Welded Austenitic Sanitary Tubing ASTM A249/A269/A270.
Applications of SS 304 Pipe, 304 SS Tubing
Stainless steel 304 tubes and ss 304 pipes are used in food and beverage processing equipment and piping, chemical and pharmaceutical process lines, architectural railings and structural trim, automotive exhaust and manifold systems, and water treatment and plumbing networks. Related product pages:
SS 304 Coil Tube |SS 304 Buttweld Fittings |SS 304 Forged Fittings |SS 304 Flanges |SS 304 Plates, Sheets & Coils |Instrumentation Tubing |Heat Exchanger Tubes |Finned Tubes.
Industries Served
Oil & gas, power generation, chemical & petrochemical, pharmaceutical, food & dairy processing, water & wastewater treatment, construction & architecture, marine, and general engineering and fabrication.
304 Stainless Steel Pipe Price List
SS 304 pipe price is driven primarily by current LME nickel and base stainless steel coil/billet rates, since nickel content (8–10.5%) is the single largest cost driver in the alloy. Beyond raw material, price varies with: seamless vs welded construction (seamless commands a premium), schedule/wall thickness, surface finish (polished and electropolished cost more than mill finish), order quantity, mill test certification, and freight/logistics to destination. Because nickel and stainless coil prices move daily, Amardeep does not publish a fixed online 304 stainless steel pipe price list — buyers should request a same-day quote against their exact size, schedule, and quantity.
For an accurate, current ss 304 pipe price list, share your required NPS, schedule, length, and quantity (or your full BOQ) with our sales team. We quote both per-metre and per-kg equivalents so you can compare directly against any competing offer, and we can issue indicative pricing within the same business day for standard stocked sizes.
Export Information — Worldwide Shipment of SS 304 Pipes & Tubes
Amardeep Steel Centre exports SS 304 pipes and tubes worldwide from its Mumbai facility, with regular shipments to the Middle East (UAE, Saudi Arabia, Qatar, Oman), Africa, Southeast Asia, Europe, and the Americas. Full export documentation — commercial invoice, packing list, certificate of origin, mill test certificate (EN 10204 3.1), and third-party inspection certificates — is provided with every export consignment.
Related Products
- SS 304L Pipes & Tubes
- SS 304H Pipes & Tubes
- SS 316 Pipes & Tubes
- SS 316L Pipes & Tubes
- SS Seamless Pipes & Tubes
- SS Welded Pipes & Tubes
- SS Buttweld Fittings
- SS Flanges
- SS 304 Forged Fittings
- SS 304L Buttweld Fittings
- ASTM A312 / A358 SS Pipes
Useful Resources & Blog Posts
- 304 vs 316 Stainless Steel
- Difference Between SS 304 and SS 316
- SS 304 Grade — Composition, Uses & Properties
- Density of Stainless Steel 304 ·Seamless vs Welded Pipe
- Steel Pipe Sizes Explained
- What Are SS Pipes & Their Types
- Complete Guide to SS Tubing
Why Choose Amardeep Steel for SS 304 Pipe & 304 Stainless Tubing
As a direct manufacturer and stockist, Amardeep Steel Centre controls quality and production end-to-end rather than reselling third-party stock. Large-scale operations support competitive pricing across the full range of stainless steel 304 pipes & tubes, backed by a vast ready inventory across all major sizes and schedules for fast dispatch. As an experienced global exporter, we manage logistics and documentation for shipments of any size, and every consignment is supplied with full Mill Test Certificates (EN 10204 3.1) and rigorous in-house testing.
Frequently Asked Questions — SS 304 Pipe & Tubes
Is 304 stainless steel good quality?
Yes. SS 304 is an 18% chromium, 8% nickel austenitic stainless steel valued for strong corrosion resistance, easy fabrication and weldability, and a hygienic, non-reactive surface. It is the most widely used stainless steel grade globally and suits most general corrosive, food-grade, and architectural applications, though more aggressive chloride environments call for SS 316.
What is the difference between Stainless Steel 304 and 316 pipes?
SS 316 contains 2–3% molybdenum, which SS 304 does not. This gives SS 316 significantly better resistance to chlorides and marine or saline environments. SS 304 is more economical and performs well in general industrial, food, and architectural use; SS 316 is preferred for marine, pharmaceutical, and high-chloride chemical service.
What percentage is 304 stainless steel?
Stainless Steel 304 typically contains 18–20% chromium and 8–10.5% nickel, with a maximum of 0.08% carbon, up to 2% manganese, 0.75% silicon, 0.045% phosphorus, and 0.030% sulfur, the balance being iron. This composition is why the grade is commonly called 18/8 stainless steel.
Where can I buy SS 304 pipes and tubes?
Amardeep Steel Centre stocks SS 304 pipes and tubes in seamless, welded, ERW, and EFW forms at its Mumbai warehouse and supplies buyers across India and export markets worldwide, complete with EN 10204 3.1 mill test certificates and IBR documentation on request. Submit a quote request with your required size and schedule for current pricing.
What is the difference between SS 304 and SS 304L pipe?
SS 304L is the low-carbon variant of SS 304, with carbon capped at 0.030% versus 0.08% for standard 304. The lower carbon content reduces the risk of chromium carbide precipitation at weld zones, giving 304L better resistance to intergranular corrosion after welding without post-weld heat treatment. 304L has slightly lower mechanical strength than 304.
What is the maximum operating temperature for SS 304 pipe?
SS 304 pipe is rated for continuous service up to approximately 870°C (1600°F) in oxidizing atmospheres, though mechanical strength reduces above roughly 550°C. For sustained high-temperature service with better strength retention, SS 304H (higher carbon, coarser grain) is typically specified.
Is SS 304 pipe magnetic?
SS 304 is austenitic and is non-magnetic (or only very weakly magnetic) in its fully annealed condition. Cold working during forming or bending can induce some martensite at the surface, making formed sections mildly magnetic in spots — this does not affect corrosion performance.
Can SS 304 pipe be used for drinking water lines?
Yes. SS 304 is widely approved for potable water and food-grade piping because it does not react with or contaminate water and resists the chlorine levels typically used for municipal disinfection. For high-chloride source water, SS 316 is sometimes preferred as an added margin of corrosion resistance.
What is the HSN code for stainless steel 304 pipe?
Stainless steel pipes generally fall under HSN heading 7304 (seamless) or 7306 (welded), with stainless-specific sub-headings such as 73041100/73041900 and 73061100/73064000 commonly applied — confirm the exact sub-heading with your customs/import documentation, as classification can depend on the exact construction and end use.
What is the 304 stainless steel pipe price list today?
Because nickel and stainless coil prices move daily, Amardeep does not publish a fixed 304 stainless steel pipe price list online. Contact our sales team with your exact NPS, schedule, form, and quantity for a same-day indicative price in both per-metre and per-kg format.
Get a Competitive Quote for Stainless Steel 304 Pipes & Tubes
Amardeep Steel Centre supplies SS 304 Pipe & Tube in seamless, welded, ERW, and EFW forms with complete documentation including EN 10204 3.1 MTC, IBR Form III-D, and third-party inspection on request. Ready stock available in Mumbai with worldwide export capability.
