ASTM A193 B8 Stud Bolt and A194 8 Hex Nuts,SS304 Stud bolt
ASTM A193 Grade B8 Stud Bolts, ASTM A193 Grade B8 Class 1 Stud bolt, ASTM A193 Grade B8 Class 2 Stud bolt,
We can also spply ASTM A193 Grade B8 Stud Bolts in different sizes and shapes to our customers.
Stud bolts are threaded miniature rods which are used to hold together high-pressure flange connections in the oil, gas and petrochemical industry. Based on the piping system used in on-site and offshore equipment, the nuts could be of the hexagon or heavy hexagon type.
Grade B8
There are 2 general grade under ASTM A193 B8
ASTM A193 Grade B8 Class 1 Stud bolt, ASTM A193 Grade B8 Class 2 Stud bolt,
| ASTM A193 B8 CL1 | Class 1 Stainless steel, AISI 304, carbide solution treated. |
| ASTM A193 B8 CL2 | Class 2 Stainless steel, AISI 304, carbide solution treated, strain hardened |
ASTM A193 Grade B8 Class 1 bolts and threaded studs are manufactured from AISI 304 stainless steel. Type 304 is the most common grade of stainless steel used in the fastener industry. Fasteners manufactured using this austenitic stainless steel require carbide solution treatment on bars to be threaded or after the heading operation for bolts with forged heads. Carbide solution treatment, also referred to as solution annealing, is a process in which fasteners or stainless bars are heated and then water-quenched to assure maximum corrosion resistance. A193 Grade B8 Class 2 bolts are strain hardened after carbide solution treatment to achieve increased strength characteristics and reduce the potential for galling. Class 2 bolts are marked “B8SH” with the grade symbol underlined.
| Grade | Size | Tensile ksi, min | Yield, ksi, min | Elong, %, min | RA % min | HBW | Rockwell |
|---|---|---|---|---|---|---|---|
| B8 Class 1 | All | 75 | 30 | 30 | 50 | 223 max | 96 max HRB |
| B8 Class 2 | Up to 3/4 | 125 | 100 | 12 | 35 | 321 max | 35 max HRC |
| 7/8 – 1 | 115 | 80 | 15 | 35 | |||
| 1-1/8 – 1-1/4 | 105 | 65 | 20 | 35 | |||
| 1-3/8 – 1-1/2 | 100 | 50 | 28 | 45 |
ASTM A193 Grade B8 specification covers requirements for 304/304L stainless steel bolting material with high tensile properties, for use in high temperature or high-pressure service and other special purpose applications.
ASTM A193 B8 Stud Bolt Chemical Properties
| Grade | C | Mn | Si | P | S | Ni | Cr | Mo |
| B8 (AISI 304) | 0.08% max | 2.00% max | 1.00% max | 0.045% | 0.030% | 8.0 – 11.0% | 18.0 – 20.0% | – |
Material: A193 B8 Stud Bolt and A194 8 Hex Nuts
A193 B8 Hex Bolt and A194 8 Hex Nuts
Standard: ASME B18.2.1, ASME B18.2.2.
Bolt -Grade Identification Markings
HOW TO ORDER OUR ASTM A193 Grade B8 Stud bolt?
EXAMPLE#1,
Stud bolt full Thread, SS304, 7/8″ -9UNC x 90, ASTM A193 -Gr.B8,W/2 Heavy HEX NUT A194 Grade 8.
Quantity: 120 Each
