China ASTM A193 Grade B16 Stud Bolts,A193 B16 Stud Bolts manufacturer
ASTM A193 Grade B16 is a bolting specification for high temperature service. It is a heat treated Chromium-Molybdenum-Vanadium steel. The specification calls for minimum strength and maximum hardness levels. It is considered to be most suitable for bolts used at temperatures below 840°F or 450° C.
The A193 Grade B16 Stud bolt is commonly used in petroleum and chemical construction applications. The ASTM standard covers alloy steel and stainless steel bolting materials for high temperature or high-pressure service. This specification includes fasteners intended for use in pressure vessels, valves, flanges, and fittings. Although, this material is often available in national coarse (UNC) thread pitches, if being used in traditional applications, threads are specified 8 threads per inch (tpi) for diameters above one inch.
A193 B16 stud bolts are a type of high temperature, high strength alloy steel fastener commonly used in oil and gas, petrochemical, and power generation industries. They are made from ASTM A193 Grade B16 steel, which is a chromium-molybdenum-vanadium alloy steel with a minimum tensile strength of 125 ksi and a minimum yield strength of 105 ksi.
A193/A193M − 22 Standard Specification for Alloy-Steel and Stainless Steel Bolting for High Temperature or High Pressure Service and Other Special Purpose
Applications
Grade B16 is a chromium, molybdenum, vanadium alloy steel widely used for high strength industrial applications. It is commonly used in power generation turbines in high strength fastener applications such as bolt material.
A193 B16 stud bolts are typically used in high temperature and high pressure applications such as flanges, pressure vessels, and valves. They come in various sizes and lengths to accommodate different applications and are often used in conjunction with A194 heavy hex nuts to provide a secure and reliable fastening solution.
A193 B16 Stud Bolts Yield Strength
| Size | Yield Strength, ksi, (min) |
| Up to 2-1/2 | 105 |
| Over 2-1/2 to 4 | 95 |
| Over 4 to 8 | 85 |
ASTM A193 Grade B16 stud bolt Chemical Composition
| Element | % |
| Carbon | 0.42 – 0.50% |
| Manganese | 0.45 – 0.70% |
| Silicon | 0.20 – 0.35% |
| Chromium | 0.80 – 1.15% |
| Molybdenum | 0.45 – 0.65% |
| Sulfur | 0.025% max |
| Phosphorous | 0.025% max |
| Vanadium | 0.25 – 0.35% |
| Aluminum | 0.015% max |
A193 Grade B16 Bolts and Nuts Mechanical Properties
| Diameter | Tensile Strength, ksi, (min) | Yield Strength, ksi, (min) | Elongation %, (min) | RA % min | HRC | HBW |
| Up to 2-1/2 | 125 | 105 | 18 | 50 | 35 max | 321 max |
| Over 2-1/2 to 4 | 110 | 95 | 17 | 45 | ||
| Over 4 to 8 | 100 | 85 | 16 | 45 |
ASTM A193 Grade B16 Stud Bolts Suface Finishes
- Black（Oxidation)
- Suitable for indoor use or when corrosion resistance is not critical.
- Coated Options:
- Hot-dip galvanizing (HDG): Adds corrosion resistance but may alter thread dimensions.
- PTFE or Xylan Coating: Reduces friction and improves corrosion resistance.
- Zinc Plating: Lightweight protection against corrosion.
ASTM A193 Grade B16 Stud Bolts Specifications
- Threading:
- Typically follows Unified National Coarse (UNC) or Unified National Fine (UNF) standards.
- Ensure compatibility with ASME B1.1 threaded components.
- Nut Compatibility:
- Often paired with ASTM A194 Grade 4 or Grade 7 heavy hex nuts
ASTM A193 Grade B16 Comparison with A193 B7 Stud Bolt
| Property | A193 B7 | A193 B16 |
|---|---|---|
| Material | Cr-Mo steel | Cr-Mo-V steel |
| Temperature Limit | ~450°C (842°F) | ~593°C (1100°F) |
| Applications | General-purpose bolting | High-temperature bolting |
| Cost | Lower | Higher due to added vanadium |
AST A193 B16 stud bolt order specification?
STUD BOLT + 2 HEX NUTS 1 1/2″ X 280 A193 B16+GR 7 QTY:200 PCS
STUD BOLT, 3” x 770mm UN8 STUD, WITH TWO HEAVY HEX NUTS;ASSEMBLED; ALLOY A193 B16 stud bolt
