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- SS SMLS PIPE TP304 ASTM A312
ASTM A269/A270/A213 TP304 Stainless Steel Seamless Tubes - China Suppliers & Factory for Fast Shipping
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)
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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.
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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) | ||||
| ATSM A269 TP304 | 90 | 192 | |||
| ATSM A213 TP304 | 515 | 205 | 35 | 90 | 192 |
| ATSM 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 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 & ASTM A270/A270M 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 | ||||
|---|---|---|---|---|
| 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 (FAQ)
What are the primary standards governing TP304 stainless steel tubes?
TP304 stainless steel tubes are manufactured and compliant with international standards including ASTM A269, ASTM A270, and ASTM A213, ensuring suitability for general corrosion service, sanitary service, and boiler/heat exchanger applications.
What is the chemical composition of ASTM A269 TP304?
ASTM A269 TP304 is an austenitic stainless steel alloy containing 18.00–20.00% Chromium (Cr) and 8.00–11.00% Nickel (Ni), with a maximum carbon content of 0.080%.
What are the high-temperature limits for TP304 stainless steel tubes?
TP304 tubes exhibit excellent high-temperature stability and can maintain their strength and resist oxidation up to 870°C (1600°F) in intermittent service.
Can the size and wall thickness of TP304 tubes be customized?
Yes, customization is available. Standard outer diameters range from 1/8" NB to 32" NB (10.29mm to 812.80mm), and wall thicknesses range from SCH 10S to SCH XXS. Custom specifications can be requested.
What types of inspections are performed on these stainless steel tubes?
All tubes are 100% PMI (Positive Material Identification) tested, accompanied by an EN10204.3.1B Mill Test Certificate, and third-party inspections are fully accepted to ensure material compliance.