Chetak Steel is one of the prime manufacturers and suppliers in Hyderabad, India, dealing in carbon steel products. With an unbeatable reputation, we supply finest Carbon Steel ST 35/ST 35.8 Tubing to the oil & gas, chemical, and mechanical industries. Our tubes are greatly renowned for their exceptional strength, corrosion resistance, and durability, thus making them fit for application in pressure vessels, pipelines, and structures. Committed to customer satisfaction, Chetak Steel offers quality products that meet the highest industry standards, ensuring precision and performance in each shipment.
ST 35 / ST 35.8 Tubing is a type of low carbon steel tubing that’s often chosen for its excellent formability, weldability, and reliable mechanical performance. These tubes are crafted according to DIN standards and are recognized for their smooth surface finish, precise dimensions, and consistent quality. Whether for structural or pressure-related applications, ST 35 and ST 35.8 tubing delivers dependable performance without breaking the bank. Its versatility makes it a popular choice in mechanical, construction, and industrial fields.
| Standard | Grade | C | Si | Mn | P max | S max |
| DIN2391 | St35 | ≤0.17 | ≤0.35 | ≥0.4 | 0.025 | 0.025 |
|
Tensile Strength , MPa |
Yield Strength , MPa |
Elongation, % |
Hardness, HB, WT≥5.1mm |
Hardness, HRB, WT＜5.1mm |
|
325 min |
180 min |
35 min |
137 max |
77 max |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Made from low carbon steel with carefully controlled levels of carbon, manganese, phosphorus, and sulfur, ST 35 / ST 35.8 Tubing boasts great ductility and ease of forming thanks to its low carbon content. Manganese adds to its strength and toughness, resulting in tubes that provide good tensile and yield strength, along with decent elongation and impact resistance. Notably, ST 35.8 is particularly well-suited for pressure applications due to its enhanced mechanical consistency. Plus, these tubes can be welded and machined easily without sacrificing performance.
| Nominal Wall Thickness | ||||||||||||||||||||
| DIA | SCH.5S | SCH.5 | SCH 10S | SCH.10 | SCH.20S | SCH.30 | SCH.40S | SCH.40 | SCH 60 | |||||||||||
| (A) | (B) | Meter MM | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr |
| 6 | 1/8 | 10.3 | 1 | 0.23 | 1.2 | 0.27 | 1.5 | 0.33 | 1.73 | 0.37 | ||||||||||
| 8 | 1/4 | 13.7 | 1.2 | 0.37 | 1.65 | 0.49 | 2 | 0.58 | 2.24 | 0.64 | ||||||||||
| 10 | 3/8 | 17.2 | 1.2 | 0.47 | 1.65 | 0.63 | 2 | 0.74 | 2.31 | 0.87 | ||||||||||
| 15 | 1/2 | 21.3 | 1.65 | 0.01 | 1.65 | 0.81 | 2.11 | 1.02 | 2.11 | 1.02 | 2.5 | 1.15 | 2.77 | 1.29 | ||||||
| 20 | 3/4 | 26.7 | 1.65 | 1.03 | 1.65 | 1.03 | 2.11 | 1.3 | 2.11 | 1.3 | 2.5 | 1.49 | 2.87 | 1.71 | ||||||
| 25 | 1 | 33.4 | 1.65 | 1.31 | 1.65 | 1.31 | 2.77 | 2.13 | 2.77 | 2.13 | 3 | 2.24 | 3.38 | 2.54 | ||||||
| 32 | 11/4 | 24.2 | 1.65 | 1.67 | 1.65 | 1.67 | 2.77 | 2.73 | 2.77 | 2.73 | 3 | 2.9 | 3.56 | 3.44 | ||||||
| 40 | 11/2 | 48.3 | 1.65 | 1.93 | 1.65 | 1.93 | 2.77 | 3.16 | 2.77 | 3.16 | 3 | 3.35 | 3.68 | 4.11 | ||||||
| 50 | 2 | 60.3 | 1.65 | 1.93 | 1.65 | 2.42 | 2.77 | 3.99 | 2.77 | 3.99 | 3.5 | 4.9 | 3.91 | 5.52 | ||||||
| 65 | 21/2 | 73 | 2.11 | 3.75 | 2.11 | 3.75 | 3.05 | 5.34 | 3.05 | 5.34 | 3.5 | 6 | 5.16 | 8.77 | ||||||
| 80 | 3 | 88.9 | 2.11 | 4.59 | 2.11 | 4.59 | 3.05 | 6.56 | 3.05 | 6.56 | 4 | 8.37 | 5.49 | 11.47 | ||||||
| 90 | 31/2 | 101.6 | 2.11 | 5.25 | 2.11 | 5.25 | 3.05 | 7.53 | 3.05 | 7.53 | 4 | 9.62 | 5.74 | 13.78 | ||||||
| 100 | 4 | 114.3 | 2.11 | 5.93 | 2.11 | 5.93 | 3.05 | 8.5 | 3.05 | 8.5 | 4.5 | 12.18 | 6.02 | 6.32 | ||||||
| 125 | 5 | 141.3 | 2.77 | 9.61 | 2.77 | 9.61 | 3.4 | 11.74 | 3.43 | 11.74 | 5 | 16.8 | 6.55 | 2210 | ||||||
| 150 | 6 | 168.3 | 2.77 | 11.47 | 2.77 | 11.47 | 3.4 | 14.04 | 3.43 | 14.04 | 5.5 | 22.08 | 7.11 | 28.69 | ||||||
| 200 | 8 | 219.1 | 2.77 | 15 | 2.77 | 15 | 3.76 | 20.77 | 3.76 | 20.27 | 6.35 | 33.82 | 7.04 | 37.38 | 8.18 | 43.2 | 10.81 | 53.9 | ||
| 250 | 10 | 273.1 | 3.4 | 22.95 | 3.4 | 22.95 | 4.19 | 28.2 | 4.19 | 28.2 | 6.35 | 42.41 | 7.8 | 51.81 | 9.27 | 61.22 | 12.2 | 82.8 | ||
| 300 | 12 | 323.9 | 3.96 | 31.72 | 4.19 | 33.6 | 4.57 | 36.54 | 4.57 | 36.54 | 6.35 | 50.48 | 8.38 | 66.2 | 9.53 | 75.01 | 10.31 | 80.94 | 14.27 | 110.62 |
| 350 | 14 | 355.6 | 3.96 | 34.86 | 4.78 | 41.99 | 6.35 | 55.53 | 7.92 | 68.95 | 9.53 | 82.58 | 9.53 | 82.58 | 11.13 | 96 | 15.06 | 128.42 | ||
| 400 | 16 | 406.4 | 4.19 | 42.2 | 4.78 | 48.07 | 6.35 | 63.61 | 7.92 | 79.03 | 9.53 | 94.7 | 9.53 | 94.7 | 12.7 | 125.2 | 16.66 | 162.59 | ||
| 450 | 18 | 457.2 | 4.19 | 47.46 | 4.78 | 54.15 | 6.35 | 71.69 | 7.92 | 89.1 | 11.13 | 124.32 | 9.53 | 106.83 | 14.27 | 158.27 | 19.05 | 209 | ||
| 500 | 2C | 508 | 4.78 | 60.23 | 5.54 | 69.7 | 6.35 | 79.76 | 9.53 | 118.93 | 12.7 | 157.51 | 9.53 | 118.9 | 15.06 | 185.89 | 2062 | 251.65 | ||
| 550 | 22 | 558.8 | 4.78 | 65.95 | 5.54 | 76.75 | 6.35 | 87.84 | 9.53 | 131.07 | 12.7 | 173.66 | 9.53 | 131.07 | 15.88 | 216.04 | 22.23 | 298.55 | ||
| 600 | 24 | 609.6 | 5.54 | 83.8 | 6.35 | 95.92 | 6.35 | 95.92 | 9.53 | 143.2 | 14.27 | 212.72 | 9.53 | 143.2 | 17.45 | 258.74 | 24.59 | 360.21 | ||
| 650 | 26 | 660.4 | 7.92 | 129.4 | 12.7 | 205.97 | 9.53 | 155.32 | ||||||||||||
| 700 | 28 | 711.2 | 7.92 | 139.47 | 12.7 | 222.13 | 15.88 | 276.48 | 9.53 | 167.44 | ||||||||||
| 750 | 3C | 762 | 6.35 | 120.15 | 7.92 | 149.55 | 7.92 | 149.55 | 12.7 | 238.28 | 15.88 | 296.68 | 9.53 | 179.56 | ||||||
| 800 | 32 | 812.8 | 7.92 | 159.62 | 12.7 | 254.44 | 15.88 | 316.88 | 9.53 | 191.69 | 17.48 | 348.11 | ||||||||
| 850 | 34 | 863.6 | 7.92 | 169.64 | 12.7 | 270.5 | 15.88 | 336.96 | 9.53 | 203.74 | 17.48 | 370.22 | ||||||||
| 900 | 36 | 914.4 | 7.92 | 179.77 | 12.7 | 286.75 | 15.88 | 357.28 | 9.53 | 215.93 | 19.05 | 427.09 | ||||||||
You’ll find ST 35 / ST 35.8 Tubing in a variety of applications, including hydraulic systems, pneumatic lines, boilers, heat exchangers, and pressure vessels. They’re also commonly used in automotive parts, mechanical structures, scaffolding, and general engineering fabrication. This tubing excels in environments that require moderate pressure resistance and dimensional stability. With its blend of strength, weldability, and cost-effectiveness, ST 35 and ST 35.8 tubing is a go-to option for industrial piping, machinery manufacturing, and structural projects.
Chetak Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Hyderabad, India.
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