12.9 Shear Strength. The minimum tensile strength of a 12.9 bolt is 1220 MPa. Therefore, the approximate shear strength of a 12.9 bolt is 732 MPa. The minimum yield strength of a bolt is the pressures needed to stretch the metal of the bolt. A 12.9 bolt has a minimum yield strength of 1100 MPa. Bob White began his writing career in 2006. ASTM A193 B7 v.s. A320 L7 Stud Bolts - wermacASTM A193 B7 is a Bolting specification for medium-high temperature applications. It is a heat treated Chromium Molybdenum steel and is considered for applications up to 450° Celsius (840° Fahrenheit). ASTM A320 L7 has the same chemical and physical properties as B7, with additional Charpy V Notch tests taken at -101° Celsius (-150° Fahrenheit) for low temperature applications.
ASTM A193 Grade B16 Specification. ASTM a193 grade b16 specification covers requirements for chemical composition, mechanical properties such as tensile, yield strength, hardness, heat treatment, product marking, etc., for bolts, studs, screws, threaded rods and other external threaded fasteners intended for high tensile bolting application in high temperature, high-pressure service or both. ASTM A193 Grade B7 Specification - Boltport FastenersASTM A193 defines both SI (Metric) and inch-pound units. Grade B7 is a heat-treated chromium-molybdenum low-alloy steel with minimum tensile strength requirement of 125 ksi (860 Mpa), yield 105 ksi (720 Mpa), and maximum hardness of 35HRC. Boltport uses Alloy Steel AISI 4140 bar stock or forging stock to produce B7 headed and non-headed bolts. Bolting Quick Reference Guide - ChestertonProduct Kf Max Temp Water pH Oil Steam Alloy 710 0.20 1093°C (2000°F) B C C B C 725 0.18 1425°C (2600°F) B B B B A 772 0.16 1425°C (2600°F) B B B B A 783 0.16 900°C (1650°F) A A B A B Flange and Bolt Installation All components must be correct to achieve a seal. The most common
Flanged joints using low strength carbon steel bolts shall not be used above 400°F or below -20°F. Applications of bolts:i. For flanged joints in piping system where one or both flanges are of cast iron, bolts / studs conforming to ASTM A307 Gr. B and nuts conforming to A194 Gr. 2 are usually used. Engineering FAQ FastenalB7 fasteners are tempered at a higher temperature, 1100° F minimum, while Grade 5 bolts are tempered at 800° F minimum. This means that Grade 5 fasteners cannot be used in applications where the temperature can surpass about 450° F due to the re-tempering effects that they may encounter while the B7 fasteners can easily handle this temperature. Fastener Specifications ASTM A193, A320, A307, A325, A593Chromium Molybendum steel, normally AISI 4140, heat treated to 28-32Rockwell Hardness, 125,000 PSI tensile strength, 105, 000 PSI yield. It will hold its strength to 1000 degrees F. This grade of studbolts are engineered to mate with ASTM A194 Grade 2H Heavy Hex Nuts.
The BS 3692 Grade 8.8 Hex Bolt and others in the 8.8 grade come with different lengths ranging from 20mm to 100mm and different finishes. There could be zinc plated, hot dip galvanized or plain types of bolts. The M20 Grade 8.8 Galvanised Bolts are dipped into the galvanizing solution and get a galvanized coating. The products are used in a variety of industrial applications ranging from Grades ASTM A193Grade B16. ASTM A193 Grade B16 bolts and threaded studs are manufactured from a chromium-molybdenum-vanadium alloy steel. Although A193 Grade B16 bolts and studs have similar strength requirements as Grade B7, the vanadium and higher tempering temperature helps the fasteners retain their molecular structure and strength under higher ambient temperatures than Grade B7. High-Temperature Fasteners:What to Know FMW FastenersIn the section above, we outlined some of the temperature limits you may face. As mentioned, A-286 can withstand temperatures of up to 1,300 Fahrenheit and nickel remains strong until temperatures reach 1,800 degrees. But, if you need fasteners that can perform at
ASTM A193 Grade B16 stud bolts with A194 Grade 7 nuts, for bolt service temperatures from 450 to 510 deg. C. When spiral wound gaskets are used for high temperature, the bolts must provide adequate stress to seat the gasket. When B8 class 2 bolts are used for temperatures over 650°C, strain hardened bolts will be required to seat the gasket. PRODUCT CATALOG - Corrosion ServiceTemperature Determine your pipes maximum operating temperature. Use standard I-Rod® up to 181º F (83º C), I-Rod® HT up to 340º F (171º C), and for temperatures up to 480ºF (249º C), specify PEEK. Also, the maximum operating temperature for polyshrink on U-Bolts is The Importance of Temperature in Bolting - Nord-Lock Group13 rows · Sep 17, 2014 · The bolts made from carbon and alloy steel can be used from 50°C while