Phanuphong Steel and Plates stands out as a trusted manufacturer and supplier of top-notch Carbon Steel Stud Bolts, proudly based in Bangkok, Thailand. The company excels in delivering high-strength fastening solutions that adhere to international standards like ASTM A193 and A307. Crafted for demanding environments involving high pressure, high temperatures, and heavy loads, Phanuphong’s stud bolts are a go-to choice in sectors such as oil & gas, petrochemical, construction, and power generation. With a commitment to precision engineering, timely delivery, and unwavering quality, Phanuphong guarantees that its carbon steel stud bolts provide optimal performance, durability, and safety, even in the toughest industrial settings.
When it comes to the composition and mechanical properties of their Carbon Steel Stud Bolts, Phanuphong Steel typically uses materials like ASTM A193 Grade B7 or A307 Grade B. These bolts usually contain carbon (up to 0.50%), manganese (up to 0.90%), along with small amounts of sulfur, phosphorus, and silicon. The mechanical properties differ by grade, with tensile strength ranging from 414 to 860 MPa and yield strength between 240 and 720 MPa. These stud bolts are known for their impressive hardness, tensile strength, and impact resistance. They undergo heat treatment to enhance their mechanical performance, making them perfect for bolting pressure vessels, flanges, and piping systems.
Specification : ASTM F568 / ASME SF568
Dimension : DIN, ISO, ASTM, JIS, BS, GB, IS and all International Standards
Size Range : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Length : 3 mm to 200 mm
Type : Stud Bolts, Heavy Stud bolt, Tie Bar, Tie Rod, Continuous Threaded Stud Bolts (Fully Threaded Studs without Chamfered Ends), Tap End Stud Bolts, Double End Stud Bolts, Double End Stud Bolts with Reduced Shank, Flange Stud Bolts (Fully Threaded Studs with Chamfered Ends), MS Stud Bolts, Metric Thread Stud Bolt, Rough Forged Stud Bolts, Stud Half Thread Bolts etc.
| Grade | C | P | S | B |
| Carbon Steel 10.9 | 0.20-0.55 | 0.025 | 0.025 | 0.003 |
| Carbon Steel 12.9 | 0.28-0.5 | 0.025 | 0.025 | 0.003 |
| Element | Nominal thread diameter size range [mm] | Proof strength [MPa] | Yield strength (min) [MPa] | Tensile strength (min) [MPa] | Hardness [Rockwell] |
| Carbon Steel 10.9 | 5–100 | 830 | 940 | 1040 | C32–39 |
| Carbon Steel 12.9 | 1.6–100 | 970 | 1100 | 1220 | C39–44 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
| Characteristics | Strength class 10.9 Stud Bolts | ||
|---|---|---|---|
| Tensile strength Rm (MPa) | nom | 1000 | |
| minimum | 1040 | ||
| Yield strength Rm (MPa) ReL up to 6.8 – Rp0,2 from 8.8 | nom | 900 | |
| minimum | 940 | ||
| Elongation after fracture, a% | minimum | 9 | |
| Necking Z% | 48 | ||
| Vickers hardness (HV) F ≥ 98 N | minimum | 320 | |
| max | 380 | ||
| Brinell hardness (HB) F = 30D2 | minimum | 304 | |
| max | 361 | ||
| Rockwell hardness HRB up to 6.8 – HRC from 8.8 | minimum | 32 | |
| max | 39 | ||
| Resilience KV (J) – 20°C(1) | minimum | 27 | |
Phanuphong’s Carbon Steel Stud Bolts play a vital role in industrial bolting systems, especially in applications where strength and reliability are paramount. You’ll often find them fastening flanges, valves, pressure vessels, and heat exchangers in oil & gas, petrochemical, and power generation facilities. They’re also widely used in construction projects, heavy machinery, and infrastructure development. Thanks to their durability and heat resistance, these carbon steel stud bolts are particularly well-suited for high-pressure and high-temperature conditions.
Phanuphong 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 Bangkok, Thailand.
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