TP304L GRADE SS WLD PIPE & Tube
Introduction
TP304 (UNS S30400) and 304L (UNS S30403) are austenitic stainless steels widely used in welded tubing due to their excellent corrosion resistance, formability, and cost-effectiveness. Both belong to the 18-8 chromium-nickel family, with 304L being the low-carbon variant (L = "Low carbon") designed to minimize carbide precipitation during welding.
Key Features
Microstructure: Single-phase austenitic structure, non-magnetic (unless cold-worked), providing high ductility and toughness.
Corrosion Resistance: Excellent in oxidizing environments (e.g., nitric acid, atmospheric corrosion).
Resistant to general corrosion in freshwater, steam, and many organic acids.
Susceptible to intergranular corrosion (IGC) if sensitized (e.g., prolonged exposure at 427–816°C), due to chromium carbide precipitation at grain boundaries.
High-Temperature Performance: Retains strength up to ~870°C, suitable for service in moderate high-temperature applications (e.g., furnace parts, heat exchangers).
Weldability: Easily welded by GTAW (TIG), GMAW (MIG), and SAW.
Use 308 or 308L filler metal to match corrosion resistance; post-weld heat treatment (PWHT) is generally unnecessary for non-critical applications.
Material Specification
Standard: ASTM A312/A312M (A269&A312&A270)
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
Construction
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
TP304L CHEMICAL COMPOSITION
|
HEAT NO. |
CHEMICAL COMPOSITION (%) |
||||||||
|
C |
Mn |
P |
S |
Si |
Ni |
Cr |
Mo |
||
|
STAND. |
MIN. |
8.00 |
18.00 |
||||||
|
MAX. |
0.035D |
2.00 |
0.045 |
0.030 |
1.00 |
13.00 |
20.00 |
||
TP304L 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) |
||||
|
TP304L |
485 |
170 |
35 |
90 |
187 |
Equivalent Grades - (TP304L ASTM A312 (A269&A312&A270) Equivalent Grades)
| TP304L ASTM A312 (A269&A312&A270) Equivalent Grades | ||||||
| China (GB) | U.S. (ASTM/UNS) | Europe (EN) | Japan (JIS) | Germany (DIN) | International (ISO) | Russia (GOST) |
| 06Cr19Ni10 (022Cr19Ni10) | 304L (UNS S30403) | 1.4307 (X2CrNi18-9) | SUS304L | X2CrNi18-9 (1.4307) | X2CrNi18-9 | 03Kh18N11 |
ASTM A312/A312M Standard Cold Machining Size Deviation Permitted
| ASTM A312/A312M-09 Standard cold machining size deviation permitted | |||||
| Nominalouisso damater | Allowable daviation | 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 TubesC | |
| 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 0.065in. [1.65mm]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]nomina |
| 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 [020] | 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], exdl | 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 | 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 |