China ASTM A193 Grade B8 Stud Bolts manufacturer
ASTM A193 B8 Stud bolts
ASTM A193 Grade B8 Stud Bolts are high strength 304 stainless steel bolts, coupled with pair of A194-8 nuts for bolting carbon and stainless steel pipelines. Boltport is a manufacturer and supplier of fully threaded, tap end and double end stud bolts in ASTM A193 Grade B8 Class 1, Class 2 & Class 2B specification. We offer b8 stud bolts in both metric and imperial sizes with coarse, fine & extra fine threads. A193 B8 stud bolts & A194 Gr.8 Hex nuts are produced with full compliance to all requirements of ASTM A193 Grade B8 specification and supplied with 3.1 certificate.
A193 Grades Stud bolts
| B7 | Alloy steel, AISI 4140/4142 quenched and tempered |
|---|---|
| B8 | Class 1 Stainless steel, AISI 304, carbide solution treated. |
| B8M | Class 1 Stainless steel, AISI 316, carbide solution treated. |
| B8 | Class 2 Stainless steel, AISI 304, carbide solution treated, strain hardened |
| B8M | Class 2 Stainless steel, AISI 316, carbide solution treated, strain hardened |
ASTM A193 B8, B8A CHEMICAL COMPOSTION
| IDENTIFICATION | B8, B8A | B8C, B8CA | ||
|---|---|---|---|---|
| Grade | Unstabilized 18 chromium – 8 Nickel (Type 304 Stainless) | Stabilized 18 Chromium- 8 Nickel (Type 347 Stainless) | ||
| Element | Range | Tolerance +/- | Range | Tolerance +/- |
| Carbon, max | 0.08 | 0.01 over | 0.08 | 0.01 over |
| Manganese, max | 2.00 | 0.04 over | 2.00 | 0.04 over |
| Phosphorus, max | 0.045 | 0.010 over | 0.045 | 0.010 over |
| Sulfur, max | 0.030 | 0.005 over | 0.030 | 0.005 over |
| Silicon | 1.00 | 0.05 over | 1.00 | 0.05 over |
| Chromium | 18.00 – 20.00 | 0.20 | 17.00 – 19.00 | 0.20 |
| Nickel | 8.00 – 10.50 | 0.15 | 9.00 – 13.00 | 0.15 |
| Molybdenum | – | |||
| Columbium + Tantalum | – | 10x carbon, min | 0.05 under |
The specification for ASTM A193 covers alloy and stainless steel bolting for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications. The ASTM A193 specification covers bars, bolts, screws, studs, stud bolts, and wire.
HOW TO ORDER OUR ASTM A193 Grade B8 Stud Bolts
EXAMPLE #1 Stud bolt full Thread, SS304, 7/8″ -9UNC x 100, ASTM A193 -Gr.B8
Stud bolt full Thread, SS304, 1″ -8UN x 100, ASTM A193 -Gr.B8