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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 from China Suppliers | Reliable Factory Stock for Fast Delivery
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
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 (%) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 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 | Hardness | |
| Rockwell B (HR B) | Brinell (HB) | ||||
| TP304 | 515 | 205 | 35 | 90 | 187 |
Equivalent Grades - (TP304 ASTM A312/A312M (A269&A312&A270) Equivalent Grades)
| TP304 ASTM A312 (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 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 A312/A312M Standard Cold Machining Size Deviation Permitted
| ASTM A312/A312M-09 Standard cold machining size deviation permitted | |||||
|---|---|---|---|---|---|
| Nominal outside diameter | Allowable deviation | Nominal wall thickness | 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 wld 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 & 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, A % | Permissible Variations in Cut Length, in. [mm] B | Thin Walled Tubes C | |
| 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] A | ||
| 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 |
Comparison Table Of American Standard Dimensions - (ANSI B36.19 & ANSI B36.10)
| OD DN | IN | OD MM | ANSI B36.19 | ANSI B36.10 | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal diameter in inches | ||||||||||||||||||||
| 5s | 10s | Sched.40s | Sched.40 | Sched.80s | Sched.80 | 10 | 20 | 30 | Standard | |||||||||||
| mm | Kg/m | mm | Kg/m | mm | Kg/m | mm | mm | Kg/m | mm | mm | Kg/m | mm | Kg/m | mm | Kg/m | mm | Kg/m | |||
| 6 | 1/8" | 10.29 | - | - | 1.24 | 0.281 | 1.73 | 0.371 | 1.73 | 2.41 | 0.467 | 2.41 | - | - | - | - | - | - | 1.73 | 0.371 |
| 8 | 1/4" | 13.72 | - | - | 1.65 | 0.499 | 2.24 | 0.644 | 2 | 3.02 | 0.809 | 3.02 | - | - | - | - | - | - | 2.24 | 0.644 |
| 10 | 3/8" | 17.14 | - | - | 1.65 | 0.64 | 2.31 | 0.858 | 2.31 | 3.2 | 1.118 | 3.2 | - | - | - | - | - | - | 2.31 | 0.858 |
| 15 | 1/2" | 21.34 | 1.65 | 0.814 | 2.11 | 1.016 | 2.77 | 1.26 | 2.77 | 3.73 | 1.62 | 3.73 | - | - | - | - | - | - | 2.77 | 1.26 |
| 20 | 3/4" | 26.67 | 1.65 | 1.034 | 2.11 | 1.298 | 2.87 | 1.68 | 2.87 | 3.91 | 2.19 | 3.91 | - | - | - | - | - | - | 2.87 | 1.68 |
| 25 | 1" | 33.4 | 1.65 | 1.312 | 2.77 | 2.125 | 3.38 | 2.5 | 3.38 | 4.55 | 3.23 | 4.55 | - | - | - | - | - | - | 3.36 | 2.5 |
| 32 | 1 1/4" | 42.16 | 1.65 | 1.674 | 2.77 | 2.732 | 3.56 | 3.38 | 3.56 | 4.85 | 4.46 | 4.85 | - | - | - | - | - | - | 3.56 | 3.38 |
| 40 | 1 1/2" | 48.26 | 1.65 | 1.926 | 2.77 | 3.155 | 3.68 | 4.05 | 3.68 | 5.08 | 5.4 | 5.08 | - | - | - | - | - | - | 3.68 | 4.05 |
| 50 | 2" | 60.32 | 1.65 | 2.424 | 2.77 | 3.992 | 3.91 | 5.43 | 3.91 | 5.54 | 7.47 | 5.54 | - | - | - | - | - | - | 3.91 | 5.43 |
| 65 | 2 1/2" | 73.02 | 2.11 | 3.747 | 3.05 | 5.345 | 5.16 | 8.62 | 5.16 | 7.01 | 11.4 | 7.01 | - | - | - | - | - | - | 5.16 | 8.62 |
| 80 | 3" | 88.9 | 2.11 | 4.585 | 3.05 | 6.557 | 5.49 | 11.28 | 5.49 | 7.62 | 15.25 | 7.62 | - | - | - | - | - | - | 5.49 | 11.28 |
| 90 | 3 1/2" | 101.6 | 2.11 | 5.272 | 3.05 | 7.526 | 5.74 | 13.56 | 5.74 | 8.08 | 18.62 | 8.08 | - | - | - | - | - | - | 5.74 | 13.56 |
| 100 | 4" | 114.3 | 2.11 | 5.945 | 3.05 | 8.496 | 6.02 | 16.06 | 6.02 | 8.56 | 22.29 | 8.56 | - | - | - | - | - | - | 6.02 | 16.06 |
| 125 | 5" | 141.3 | 2.77 | 9.639 | 3.4 | 11.74 | 6.55 | 21.76 | 6.55 | 9.52 | 30.92 | 9.52 | - | - | - | - | - | - | 6.55 | 21.76 |
| 150 | 6" | 168.28 | 2.77 | 11.514 | 3.4 | 14.037 | 7.11 | 28.23 | 7.11 | 10.97 | 42.52 | 10.97 | - | - | - | - | - | - | 7.11 | 28.23 |
| 200 | 8" | 219.08 | 2.77 | 15.049 | 3.76 | 20.334 | 8.18 | 42.49 | 8.18 | 12.7 | 64.57 | 12.7 | - | - | 6.35 | 33.28 | 7.04 | 36.8 | 8.18 | 42.4 |
| 250 | 10" | 273.05 | 3.4 | 23.028 | 4.19 | 28.29 | 9.27 | 60.24 | 9.27 | 12.7 | 81.46 | 15.09 | - | - | 6.35 | 41.7 | 7.8 | 51 | 9.27 | 60.24 |
| 300 | 12" | 323.85 | 3.96 | 31.806 | 4.57 | 36.633 | 9.52 | 73.76 | 10.31 | 12.7 | 97.36 | 17.48 | - | - | 6.35 | 49.68 | 8.38 | 65.14 | 9.52 | 73.76 |
| 350 | 14" | 355.6 | 3.98 | 34.99 | 4.78 | 42.102 | 9.52 | - | 11.13 | - | - | 19.05 | 6.35 | 54.63 | 7.92 | 67.98 | 9.52 | 81.21 | 9.52 | 81.21 |
| 400 | 16" | 406.4 | 4.19 | 42.35 | 4.78 | 48.22 | 9.52 | - | 12.7 | - | - | 21.44 | 6.35 | 62.58 | 7.92 | 77.9 | 9.52 | 93.13 | 9.52 | 93.18 |
| 450 | 18" | 457.2 | 4.19 | 47.7 | 4.78 | 54.3 | 9.52 | - | 14.27 | - | - | 23.82 | 6.35 | 70.5 | 7.92 | 87.8 | 11.13 | 122.12 | 9.52 | 105.05 |
| 500 | 20" | 508 | 4.77 | 60.32 | 5.54 | 69.766 | 9.52 | - | 15.09 | - | - | 26.19 | 6.35 | 78.47 | 9.52 | 116.97 | 12.7 | 155 | 9.52 | 116.97 |
| 550 | 22" | 558.8 | 4.77 | - | 5.54 | - | 9.52 | - | - | - | - | 28.58 | 6.35 | 86.42 | 9.52 | 128.89 | 12.7 | 170.86 | 9.52 | 128.89 |
| 600 | 24" | 609.6 | 5.54 | 84.1 | 6.35 | 96.215 | 9.52 | - | 17.48 | - | - | 30.96 | 6.35 | 96.215 | 9.52 | 140.8 | 14.7 | 209.54 | 9.52 | 140.81 |
| 650 | 26" | 660.4 | - | - | - | - | 9.52 | - | - | - | - | - | 7.92 | 127.58 | 12.7 | 202.65 | - | - | 9.52 | 152.73 |
| 700 | 28" | 711.2 | - | - | - | - | 9.52 | - | - | - | - | - | 7.92 | 137.52 | 12.7 | 218.54 | 15.88 | 271.94 | 9.52 | 164.65 |
| 750 | 30" | 762 | 6.35 | 120.59 | 7.92 | 147.45 | 9.52 | - | - | - | - | - | 7.92 | 147.45 | 12.7 | 234.44 | 15.88 | 291.81 | 9.52 | 176.57 |
| 800 | 32" | 812 | - | - | - | - | 9.52 | - | 17.48 | - | - | - | 7.92 | 157.39 | 12.7 | 250.33 | 15.88 | 311.67 | 9.52 | 188.5 |
| 850 | 34" | 863.6 | - | - | - | - | 9.52 | - | 17.48 | - | - | - | 7.92 | 167.32 | 12.7 | 266.22 | 15.88 | 331.54 | 9.52 | 200.42 |
| 900 | 36" | 914.4 | - | - | - | - | 9.52 | - | 19.05 | - | - | - | 7.92 | 177.26 | 12.7 | 282.18 | 15.88 | 351.41 | 9.52 | 212.34 |
Frequently Asked Questions (FAQ)
QWhat manufacturing standards apply to TP304 stainless steel tubes?
TP304 is manufactured and specified under standard specifications including ASTM A312/A312M (for welded pipes), ASTM A269 (for general service tubing), ASTM A270, ASME SA312, and EN 10296-2.
QWhat is the main difference between TP304 and TP304L?
TP304 contains a higher carbon content (≤0.080%) compared to TP304L, which provides higher strength and better mechanical properties for non-welded or lightly welded applications, while remaining cost-effective and globally available.
QWhat is the recommended operating temperature range for TP304?
TP304 has an operating temperature range of -200°C to 400°C (-328°F to 752°F). Sustained operation above 425°C (797°F) should be avoided to prevent sensitization (chromium carbide precipitation).
QWhat surface finishes and end types are available for TP304?
Available finishes include Annealed, Pickled, Polished (#4 brushed, BA bright annealed), and Electropolished (mirror-like Ra ≤ 0.8 μm for 3-A Sanitary compliance). End finishes include Plain End, Beveled End, and Threaded.
QWhich industries and applications commonly utilize TP304 tubing?
Major applications include the Food & Beverage industry, Architecture & Construction, Chemical & Petrochemical processing, Automotive systems, Pharmaceuticals, and General Engineering.
QWhat quality inspections and certifications accompany TP304 tubes?
Products undergo 100% PMI testing, come with EN10204 3.1B Mill Test Certification, and support third-party inspection upon customer request.