Hardness testing to ISO 6508-1
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ASTM A193 is a specification for high-strength stainless steel bolts used in extreme environments such as chemical plants, offshore oil rigs, and power generation facilities. The grade B8T hex bolt is a specific type of ASTM A193 bolt that is made from Type 321 stainless steel and is heat-treated for added strength.
Features One of the main features of ASTM A193 Grade B8T hex bolts is their high tensile strength, which makes them ideal for use in harsh environments. The addition of titanium in Type 321 stainless steel improves the bolt's resistance to corrosion and oxidation, increasing its durability and longevity. These bolts also have excellent resistance to high temperatures, making them suitable for use in applications where the temperature may exceed 800°F.
Applications Due to their high strength and corrosion resistance, ASTM A193 Grade B8T hex bolts are commonly used in industries such as chemical processing, oil and gas, and power generation. They are also often used in marine environments due to their ability to withstand saltwater corrosion. Additionally, these bolts are commonly used in high-pressure and high-temperature applications, such as boilers and pressure vessels.
Specifications | ASTM A193 / ASME SA193 |
Standard | ISO, ASTM, DIN, JIS, IS, GB, BS, and all International Standards |
Size | M3 - M100 | 3/6″ - 4″ | Custom Sizes |
Length | 3 mm - 200 mm | Custom Sizes |
DIN Standard | B.S. DIN 931, DIN 933, DIN 912, DIN 934, DIN 6923, DIN 603, DIN 7981, DIN 970, DIN916, DIN 7982, DIN 7985, DIN 913 |
UTS | NPT, UNS, UNF, UNC, UNEF, NPTF |
ISO | ISO 4033, ISO 4032, ISO 7380, ISO 4017, JIS standards |
Threads | UNF, BSW, BSF, METRIC, UNC, or as required |
Surface Coating | Black Oxide, Cadmium, Galvanized, Teflon, Xylan, Zinc, Others Upon Request |
Manufacturing Process | Wire Drawing, Cold Heading, Insert tapping, Heat Treatment, Surface Plating, Inspection, Packing. |
Machining Machining ASTM A193 Grade B8T hex bolts can be challenging due to their high strength and resistance to heat. These bolts require specialized equipment and techniques for cutting and shaping. Carbide tools are recommended for machining as they can withstand the high temperatures generated during the process. Additionally, proper lubrication is crucial to prevent galling and seizing of the bolts.
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Grade | C | Mn | Si | P | S | Ni | Cr | Mo |
B8T (AISI 321) | 0.08% max | 2.00% max | 1.00% max | 0.045% | 0.030% | 8.0 - 11.0% | 18.0 - 20.0% | - |
Grade | >Size | >Tensile ksi, min | >Yield, ksi, min | >Elong, %, min | >RA % min |
B8T | All | 75 | 30 | 30 | 50 |
Hardness testing to ISO 6508-1
Nut proof load testing to ISO 898-2
Suitability for preloading to EN 14399-2
Calibrated gauges and tools
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