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- SS SMLS PIPE TP304 ASTM A312
ASTM A269 A270 A213 TP304 Stainless Steel Seamless Tubes | China Suppliers & Factory Direct Delivery
Introduction
A standard austenitic stainless steel under ASTM A269, widely used for seamless and welded tubing in general corrosion-resistant applications. It contains 18–20% Cr and 8–11% Ni, offering balanced mechanical properties and formability.
Key Features
Corrosion Resistance
Resists oxidation and organic acids but may suffer from intergranular corrosion in welded areas due to carbide precipitation.
High-Temperature Stability
Maintains strength up to 870°C, suitable for moderate heat environments.
Applications
Fluid/gas transfer, heat exchangers, and industrial piping systems.
Why Choose TP304 Stainless Steel Tube?
- Superior Corrosion Resistance: TP304 resists oxidation, organic acids, and mild corrosive environments, making it ideal for applications exposed to moisture, chemicals, or saline atmospheres. Its chromium content forms a passive oxide layer that self-repairs when damaged.
- High-Temperature Stability: Withstanding temperatures up to 870°C (1600°F) intermittently, TP304 is suitable for heat exchangers, exhaust systems, and industrial furnaces.
- Mechanical Strength and Ductility: The alloy maintains excellent tensile strength and elongation even at cryogenic temperatures, ensuring reliability under mechanical stress or thermal cycling.
- Ease of Fabrication: TP304’s outstanding formability and weldability (via TIG, MIG, or laser welding) allow for seamless integration into complex designs without sacrificing performance.
- Hygienic and Aesthetic Appeal: Its smooth surface inhibits bacterial growth, critical for food, pharmaceutical, and medical industries. Additionally, its polished finish is visually appealing for architectural uses.
- Cost-Effectiveness: Compared to higher-grade alloys like TP316, TP304 offers a budget-friendly solution for applications where extreme chloride resistance is not required.
- Compliance with Standards: TP304 tube meets international specifications (e.g., ASTM A269, A213) and is NSF-certified for potable water systems, ensuring quality and safety.
Material Specification
Standard
ASTM A269 & A270 & A213
O.D
1/8" NB TO 32" NB (10.29MM-812.80MM) (Customization Available)
W.T
SCH 10S, SCH 40S, SCH 80S, SCH160, SCH XXS (Customization Available)
Application
- Heat Exchangers and Boilers
- Food and Beverage Processing
- Petrochemical and Energy Sectors
- Architectural and Decorative Uses
- Food & Dairy Plants
- Pharmaceutical Plant
End
Plain End, Beveled End, Threaded
Processing
Cut-to-length; Polishing.
Inspection
- 100% PMI TESTED
- EN10204.3.1B MILL TEST CERTIFICATE
- THIRD PARTY INSPECTION ACCEPTED
Delivery Condition
Cold Drawn, Annealed and Pickled / Polished / Bright Annealed / Sand blasting / Shot Blasting.
Marking
All SS SMLS Pipes are marked as follows: Standard, Grade, OD, Thickness, Length, Heat No. (Or as per the customer’s request)
Packing
Packed in Wooden Boxes, plywood cases, Steel Strips Bundled, or as per Customers Requests
Specials
Sizes and Specifications other than above can be customized on request.
Specification Parameters
A269/270/213 TP304 Chemical Composition
| HEAT NO. | CHEMICAL COMPOSITION (%) | |||||||
|---|---|---|---|---|---|---|---|---|
| C | Mn | P | S | Si | Ni | Cr | ||
| STAND. | MIN. | - | - | - | - | - | 8.00 | 18.00 |
| MAX. | 0.080 | 2.00 | 0.045 | 0.030 | 1.00 | 11.00 | 20.00 | |
A269/270/213 TP304 Mechanical Properties
| Mechanical Properties | |||||
|---|---|---|---|---|---|
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness MAX | |
| Rockwell (HRB) | Brinell (HBW) | ||||
| ASTM A269 TP304 | - | - | - | 90 | 192 |
| ASTM A213 TP304 | 515 | 205 | 35 | 90 | 192 |
| ASTM A270 TP304 | 515 | 205 | 35 | B90 | - |
Equivalent Grades - (ASTM A269 & A270 & A213 TP304 Equivalent Grades)
| ASTM A269/270/213 TP304 Equivalent Grades | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| USA (ASTM / AISI) | Germany (DIN, WNr) | Japan (JIS) | France (AFNOR) | England (BS) | Euronorms (EN) | Italy (UNI) | Spain (UNE) | China (GB) | Sweden (SS) | Poland (PN) | Czech Republic (CSN) | Austria (ONORM) |
| 304 304H S30400 |
1.4301 1.5301 X5CrNi18-10 X5CrNi18-9 X6CrNi18-9 |
SUS304 | 304F00 X5CN18-10 Z4CN19-10FF Z5CN17-08 Z6CN18-09 Z7CN18-09 |
304S11 304S15 304S16 304S17 304S18 304S25 304S31 |
1.4301 1.4948 X5CrNi18-10 X6CrNi18-10 |
X3CrNi18-10 X5CrNi18-10 |
F.3504 F3551 X5CrNi18-10 |
0Cr19Ni9 0Cr18Ni9 |
2332 2333 |
0H18N9 | 17240 | X5CrNi18-10OS |
ASTM A269/A269M Standard Cold Machining Size Deviation Permitted
| ASTM A269/A269M Standard cold machining size deviation permitted | ||||||
|---|---|---|---|---|---|---|
| Group | Size, Outside Diameter, in. [mm] | Permissible Variations in Outside Diameter, in. [mm] | Permissible Variations in Wall Thickness, % | Permissible Variations in Cut Length, in. [mm] | Thin Walled Tubes | |
| Over | Under | |||||
| 1 | Up to 1/2 [13] | ±0.005 [0.13] | ±15 | 1/8 [3.2] | 0 | ... |
| 2 | 1/2 to 1 1/2 [13 to 38], excl | ±0.005 [0.13] | ±10 | 1/8 [3.2] | 0 | less than 0.065 in. [1.65 mm] nominal |
| 3 | 1 1/2 to 3 1/2 [38 to 89], excl | ±0.010 [0.25] | ±10 | 3/16 [4.8] | 0 | less than 0.095 in. [2.41 mm] nominal |
| 4 | 3 1/2 to 5 1/2 [89 to 140], excl | ±0.015 [0.38] | ±10 | 3/16 [4.8] | 0 | less than 0.150 in. [3.81 mm] nominal |
| 5 | 5 1/2 to 8 [140 to 203], excl | ±0.030 [0.76] | ±10 | 3/16 [4.8] | 0 | less than 0.150 in. [3.81 mm] nominal |
| 6 | 8 to 12 [203 to 305], excl | ±0.040 [1.01] | ±10 | 3/16 [4.8] | 0 | less than 0.200 in. [5.08 mm] nominal |
| 7 | 12 to 14 [305 to 356], excl | ±0.050 [1.26] | ±10 | 3/16 [4.8] | 0 | less than 0.220 in. [5.59 mm] nominal |
ASTM A270/A270M Standard Cold Machining Size Deviation Permitted
| ASTM A270/A270M Standard cold machining size deviation permitted | ||||
|---|---|---|---|---|
| Size, Outside Diameter, in. [mm] | Permissible Variations in Outside Diameter, in. [mm] | Permissible Variations in Cut Length, in. [mm] | ||
| Over | Under | Over | Under | |
| 1.000 [25] and under | 0.005 [0.13] | 0.005 [0.13] | 1/8 [3] | 0 |
| Over 1 [25] to 2 [50] | 0.008 [0.20] | 0.008 [0.20] | 1/8 [3] | 0 |
| Over 2 [50] to 3 [75] | 0.010 [0.25] | 0.010 [0.25] | 1/8 [3] | 0 |
| Over 3 [75] to 4 [100] | 0.015 [0.38] | 0.015 [0.38] | 1/8 [3] | 0 |
| Over 4 [100] to 5 1/2 [140], excl | 0.015 [0.38] | 0.015 [0.38] | 3/16 [5] | 0 |
| 5 1/2 [140] to 8 [200], excl | 0.030 [0.75] | 0.030 [0.75] | 3/16 [5] | 0 |
| 8 [200] to 12 [300] | 0.050 [1.25] | 0.050 [1.25] | 3/16 [5] | 0 |
Frequently Asked Questions
What are the primary chemical elements in ASTM A269 TP304 stainless steel?
ASTM A269 TP304 stainless steel contains 18–20% Chromium (Cr) and 8–11% Nickel (Ni) with a maximum carbon content of 0.080%, providing a balanced structural composition for corrosion resistance and strength.
What is the maximum operating temperature limit for TP304 tubes?
TP304 stainless steel tubes maintain mechanical strength and oxidation resistance at temperatures up to 870°C (1600°F) under intermittent service conditions.
In which industries are TP304 stainless steel tubes commonly applied?
They are widely applied in heat exchangers, boilers, food and beverage processing, petrochemical plants, pharmaceutical facilities, and architectural structures.
What testing and inspections are performed on these stainless steel tubes?
All tubes undergo 100% PMI testing, are certified with EN10204.3.1B Mill Test Certificates, and accept third-party inspection to ensure quality compliance.
What are the standard delivery conditions for TP304 tubes?
The tubes can be delivered in various finishes including Cold Drawn, Annealed and Pickled, Polished, Bright Annealed, Sand Blasting, or Shot Blasting.
How is the size deviation controlled for ASTM A269 cold machined tubes?
The permissible variations in outside diameter range from ±0.005 in. [0.13 mm] for smaller sizes (up to 1 1/2 in.) to ±0.050 in. [1.26 mm] for larger sizes (up to 14 in.), with wall thickness tolerances controlled within ±10% to ±15%.