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Product Overview
ASTM A193 Grade B16 studs are high-strength alloy steel fasteners engineered for use in high-pressure, high-temperature bolted flange connections. Manufactured from chromium-molybdenum-vanadium steel, these studs are quenched and tempered to achieve a minimum tensile strength of 860 MPa (125 ksi). B16 studs are specifically designed for service in environments up to 593°C (1100°F), making them ideal for petrochemical, refinery, and power generation applications where elevated temperature and pressure resistance are critical.
ASTM A193 B16 studs are supplied with full traceability and are compatible with ASTM A194 Grade 7 or Grade 4 nuts. They are the industry standard for Class 900-2500 ASME B16.5/B16.47 flanges, heat exchangers, and pressure vessel closures in hydrocarbon processing plants worldwide.
| Material | Alloy Steel (Cr-Mo-V) |
| UNS Number | K32045 |
| DIN Number | 1.7711 |
| Material Standard | ASTM A193 Grade B16 |
| Stud Standard (Metric) | DIN 976 / ISO 898-1 |
| Stud Standard (Inch) | ASME B16.5 / ASME B18.31.2 |
| Thread Form | ISO Metric / UNC / UN8 |
| Diameter Range | M8-M100 / ?"-4" |
| Tensile Strength | 860 MPa (125 ksi) min |
| Yield Strength | 690 MPa (100 ksi) min |
| Hardness | Max 35 HRC / 321 HB |
Complete the Fastener Set
Technical Data
| Size (M) | Pitch (mm) | Thread Length (mm) | Min L (mm) | Max L (mm) |
|---|---|---|---|---|
| M8 | 1.25 | 22 | 40 | 300 |
| M10 | 1.5 | 26 | 50 | 400 |
| M12 | 1.75 | 30 | 60 | 500 |
| M16 | 2.0 | 38 | 70 | 600 |
| M20 | 2.5 | 44 | 80 | 800 |
| M24 | 3.0 | 54 | 100 | 1000 |
| M30 | 3.5 | 66 | 120 | 1200 |
| M36 | 4.0 | 78 | 140 | 1500 |
| M42 | 4.5 | 90 | 160 | 1800 |
| M48 | 5.0 | 102 | 180 | 2000 |
| M56 | 5.5 | 114 | 200 | 2500 |
| M64 | 6.0 | 126 | 220 | 3000 |
| M72 | 6.0 | 138 | 240 | 3500 |
| M80 | 6.0 | 150 | 260 | 4000 |
| M100 | 6.0 | 174 | 300 | 5000 |
| Standard | Covers | Thread |
|---|---|---|
| DIN 976 | Stud bolts, full thread | Metric |
| ASME B16.5 | Stud bolts for flanges | UNC |
| ASME B18.31.2 | Continuous thread studs | UNC/UN8 |
| ISO 898-1 | Mechanical properties | Metric |
| MSS SP-44 | Flange stud bolts | UNC |
| Material Standard | Requirement |
|---|---|
| ASTM A193 B16 | Alloy steel, quenched & tempered |
| ASTM A194 7/4 | Compatible nuts |
| EN 10204 3.1 | Mill test certificate |
| EN 10204 3.2 | TPI-witnessed MTC |
Material Chemistry
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.37-0.49 |
| Manganese (Mn) | 0.65-1.10 |
| Phosphorus (P) | 0.035 max |
| Sulfur (S) | 0.040 max |
| Silicon (Si) | 0.15-0.35 |
| Chromium (Cr) | 0.75-1.20 |
| Molybdenum (Mo) | 0.15-0.25 |
| Vanadium (V) | 0.28-0.33 |
| Nickel (Ni) | 0.25 max |
| Copper (Cu) | 0.20 max |
Fastener Performance
| Stud Size | Dry (Nm) | Lubricated (Nm) | Clamp Load (kN) |
|---|---|---|---|
| M12 | 110 | 88 | 40 |
| M16 | 270 | 216 | 80 |
| M20 | 540 | 432 | 125 |
| M24 | 930 | 744 | 180 |
| M30 | 1850 | 1480 | 295 |
| M36 | 3200 | 2560 | 425 |
| M42 | 5100 | 4080 | 590 |
| M48 | 7600 | 6080 | 780 |
Industry Applications
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