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SS SMLS PIPE
- SS SMLS PIPE 2507 ASTM A790
- SS SMLS PIPE 2205 ASTM A790
- SS SMLS PIPE S31803 ASTM A790
- SS SMLS PIPE 904L ASTM A240
- SS SMLS PIPE TP321 ASTM A312
- SS SMLS PIPE TP310S ASTM A312
- SS SMLS PIPE TP316Ti ASTM A312
- SS SMLS PIPE TP316L ASTM A312
- SS SMLS PIPE TP316 ASTM A312
- SS SMLS PIPE TP304L ASTM A312
- SS SMLS PIPE TP304 ASTM A312
TP304 Stainless Steel Welded Pipes & Tubes - Suppliers & Factory Direct from China, Fast Delivery Available
Introduction
TP304 is a widely used austenitic stainless steel welded tube specified under standards such as ASTM A312/A312M (for welded pipes) and ASTM A269 (for general-service tubing). As part of the 300-series stainless steels, TP304 offers a balanced combination of corrosion resistance, formability, and cost-effectiveness. It is non-magnetic in the annealed state and contains 18-20% chromium and 8-10.5% nickel, making it suitable for diverse industrial, architectural, and sanitary applications. The higher carbon content (≤0.08%) compared to TP304L provides slightly enhanced strength but requires careful welding practices to avoid sensitization.
Key Features
Chemical Composition
Higher carbon content improves strength but increases susceptibility to sensitization (chromium carbide precipitation) during welding.
Mechanical Properties
Higher strength than TP304L but requires post-weld annealing in corrosive environments to restore corrosion resistance.
Temperature Resistance
Operating Range: -200°C to 400°C (-328°F to 752°F). Avoid Sustained Use above 425°C (797°F) to prevent sensitization.
Surface Finishes
Common finishes: Annealed, pickled, polished (#4 brushed, BA bright annealed), or electropolished. Sanitary applications: Mirror-like finishes (Ra ≤ 0.8 μm) compliant with 3-A Sanitary Standards.
Key Advantages
Versatility
Balances performance, cost, and ease of fabrication.
Aesthetic Appeal
Polished finishes for architectural and sanitary uses.
Weldability
Easily fabricated with standard techniques (post-weld annealing optional based on application).
Why Choose TP304 Over TP304L?
Higher Strength
Better mechanical properties for non-welded or lightly welded applications.
Cost-Efficiency
Lower initial cost than 316/L or duplex grades in mild environments.
Availability
Widely produced and stocked globally.
Material Specification
Standard:
ASTM A312/A312M (A269&A312&A270), Complies with ASTM A312, ASTM A269, ASME SA312, and EN 10296-2.
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:
Food & Beverage Industry, Architecture & Construction, Chemical & Petrochemical, Automotive, Pharmaceuticals, General Engineering.
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
TP304 Chemical Composition
| HEAT NO. | CHEMICAL COMPOSITION (%) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| STAND. | MIN. / MAX. | C | Mn | P | S | Si | Ni | Cr | Mo |
| STAND. | MIN. | - | - | - | - | - | 8.00 | 18.00 | - |
| MAX. | 0.080 | 2.00 | 0.045 | 0.030 | 1.00 | 11.00 | 20.00 | - | |
TP304 Mechanical Properties
| Mechanical Properties | |||||
|---|---|---|---|---|---|
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Rockwell B (HR B) Max | Brinell (HB) Max |
| TP304 | 515 | 205 | 35 | 90 | 187 |
Equivalent Grades - (TP304 ASTM A312/A312M (A269&A312&A270) 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 (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 A312/A312M Standard Cold Machining Size Deviation Permitted
| ASTM A312/A312M-09 Standard cold machining size deviation permitted | |||||
|---|---|---|---|---|---|
| Nominal Outside Diameter | OD (mm) | Allowable Deviation | Nominal Wall Thickness | Thickness (mm) | Allowable Deviation (%) |
| 1/8”—1 1/2“ | (10.29—48.26) | +0.4 / -0.8 | 1/8”—1 1/2“ | (10.29-73.03) all of t | +20 / -12.5 |
| >1 1/2“—4” | (48.26—114.3) | ±0.8 | 3“—18” | (88.9-457.2) t/D=5% | +22.5 / -12.5 |
| >4”—8" | (114.3—219.08) | +1.6 / -0.8 | 3“—18” | (88.9-457.2) t/D>5% | +15 / -12.5 |
| >8“—18" | (219.08—457.2) | +2.4 / -0.8 | ≥20" | =508 t of welded pipe | +17.5 / -12.5 |
| >18”—26“ | (457.2—660.4) | +3.2 / -0.8 | ≥20" | =508 t/D=5% | +22.5 / -12.5 |
| >26”—34” | (660.4—863.6) | +4.0 / -0.8 | ≥20" | =508 t/D>5% | +15 / -12.5 |
| >34“—48" | (863.6—1219.2) | +4.8 / -0.8 | - | - | - |
| Thin wall pipe (t/D=3%) ovality condition: Any cross section in a steel pipe Dmax Dmin=1.5% nominal, and (Dmax Dmin)/ 2 conforms to the stipulated diameter tolerance range. | |||||
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 Over, in. [mm] | Permissible Variations in Cut Length Under, in. [mm] | Thin Walled Tubes |
|---|---|---|---|---|---|---|
| 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 Over, in. [mm] | Permissible Variations in Outside Diameter Under, in. [mm] | Permissible Variations in Cut Length Over, in. [mm] | Permissible Variations in Cut Length Under, in. [mm] |
|---|---|---|---|---|
| 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 |
Comparison Table Of American Standard Dimensions - (ANSI B36.19 & ANSI B36.10)
| OD DN | IN | OD MM | ANSI B36.19 | ANSI B36.10 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5s (mm) | 5s (Kg/m) | 10s (mm) | 10s (Kg/m) | 40s (mm) | 40s (Kg/m) | 80s (mm) | 80s (Kg/m) | 10 (mm) | 10 (Kg/m) | Standard (mm) | Standard (Kg/m) | |||||
| 6 | 1/8" | 10.29 | - | - | 1.24 | 0.281 | 1.73 | 0.371 | 2.41 | 0.467 | - | - | 1.73 | 0.371 | ||
| 8 | 1/4" | 13.72 | - | - | 1.65 | 0.499 | 2.24 | 0.644 | 3.02 | 0.809 | - | - | 2.24 | 0.644 | ||
| 10 | 3/8" | 17.14 | - | - | 1.65 | 0.64 | 2.31 | 0.858 | 3.2 | 1.118 | - | - | 2.31 | 0.858 | ||
| 15 | 1/2" | 21.34 | 1.65 | 0.814 | 2.11 | 1.016 | 2.77 | 1.26 | 3.73 | 1.62 | - | - | 2.77 | 1.26 | ||
| 20 | 3/4" | 26.67 | 1.65 | 1.034 | 2.11 | 1.298 | 2.87 | 1.68 | 3.91 | 2.19 | - | - | 2.87 | 1.68 | ||
| 25 | 1" | 33.4 | 1.65 | 1.312 | 2.77 | 2.125 | 3.38 | 2.5 | 4.55 | 3.23 | - | - | 3.36 | 2.5 | ||
| 32 | 1 1/4" | 42.16 | 1.65 | 1.674 | 2.77 | 2.732 | 3.56 | 3.38 | 4.85 | 4.46 | - | - | 3.56 | 3.38 | ||
| 40 | 1 1/2" | 48.26 | 1.65 | 1.926 | 2.77 | 3.155 | 3.68 | 4.05 | 5.08 | 5.4 | - | - | 3.68 | 4.05 | ||
| 50 | 2" | 60.32 | 1.65 | 2.424 | 2.77 | 3.992 | 3.91 | 5.43 | 5.54 | 7.47 | - | - | 3.91 | 5.43 | ||
| 65 | 2 1/2" | 73.02 | 2.11 | 3.747 | 3.05 | 5.345 | 5.16 | 8.62 | 7.01 | 11.4 | - | - | 5.16 | 8.62 | ||
| 80 | 3" | 88.9 | 2.11 | 4.585 | 3.05 | 6.557 | 5.49 | 11.28 | 7.62 | 15.25 | - | - | 5.49 | 11.28 | ||
| 100 | 4" | 114.3 | 2.11 | 5.945 | 3.05 | 8.496 | 6.02 | 16.06 | 8.56 | 22.29 | - | - | 6.02 | 16.06 | ||
| 150 | 6" | 168.28 | 2.77 | 11.514 | 3.4 | 14.037 | 7.11 | 28.23 | 10.97 | 42.52 | - | - | 7.11 | 28.23 | ||
| 200 | 8" | 219.08 | 2.77 | 15.049 | 3.76 | 20.334 | 8.18 | 42.49 | 12.7 | 64.57 | 7.04 | 36.8 | 8.18 | 42.4 | ||
| 250 | 10" | 273.05 | 3.4 | 23.028 | 4.19 | 28.29 | 9.27 | 60.24 | 12.7 | 81.46 | 7.8 | 51 | 9.27 | 60.24 | ||
| 300 | 12" | 323.85 | 3.96 | 31.806 | 4.57 | 36.633 | 9.52 | 73.76 | 12.7 | 97.36 | 8.38 | 65.14 | 9.52 | 73.76 | ||
Frequently Asked Questions (FAQ)
What standards apply to TP304 stainless steel welded tubes?
TP304 welded tubes are specified under standards such as ASTM A312/A312M (for welded pipes) and ASTM A269 (for general-service tubing), and comply with ASME SA312 and EN 10296-2.
What is the operating temperature range for TP304?
The operating temperature range is -200°C to 400°C (-328°F to 752°F). It is recommended to avoid sustained use above 425°C (797°F) to prevent sensitization.
Why choose TP304 over TP304L?
TP304 has a higher carbon content (≤0.08%), which provides higher mechanical strength than TP304L, making it more suitable for non-welded or lightly welded applications. It also offers lower initial cost and high global availability.
What surface finishes are available for TP304 tubing?
Common finishes include Annealed, pickled, polished (#4 brushed, BA bright annealed), and electropolished. For sanitary applications, mirror-like finishes (Ra ≤ 0.8 μm) compliant with 3-A Sanitary Standards can be achieved.
What inspections are conducted on TP304 pipes?
TP304 pipes undergo 100% PMI testing, are supplied with an EN10204.3.1B Mill Test Certificate, and are compatible with accepted third-party inspections.
What are the primary applications of TP304 stainless steel?
TP304 is widely used in the Food & Beverage Industry, Architecture & Construction, Chemical & Petrochemical, Automotive, Pharmaceuticals, and General Engineering.