A193 Grade B8 Class 2 Stainless steel AISI 304 hardened full thread stud bolt
The quantity of bolts for a flange connection will be given by the number of bolt holes in a flange, diameter and length of bolts is dependent of flange type and Pressure Class of flange.
Stud Bolt length are defined in ASME B16.5 standard. The length in inches is equal to the effective thread length measured parallel to the axis, from the first to the first thread without the chamfers (points). First thread is defined as the intersection of the major diameter of the thread with the base of the point.
A193 Grade B7: Alloy steel, AISI 4140 / 4142 quenched and tempered.
A193 Grade B8, Class 1: Stainless steel, AISI 304, carbide solution treated.
A193 Grade B8, Class 2: Stainless steel, AISI 304, carbide solution treated, strain hardened.
A193 Grade B8M, Class 1: Stainless steel, AISI 316, carbide solution treated.
A193 Grade B8M, Class 2: Stainless steel, AISI 316, carbide solution treated, strain hardened.
A193 Grade B16: Alloy steel, chromium-molybdenum-vanadium, quenched and tempered.
NOTE: There are other grades of A193. Those listed here are the ones we receive the most requests for.For information on other types, please contact us.
SIZE: 1/4" - 5", M6 -M100. And 4000mm Max length.
THREAD: ASME B1.1 , UNC, UNF, CLASS 2A
FINISHED: Plain, Zinc Plated(Clear/Blue/Yellow/Black), Black oxide, Nickel, Dacromet, H.D.G.
| A193 MECHANICAL PROPERTIES |
| Grade | Size | Tensile, ksi, min | Yield, ksi, min | Elong. % min | RA min | HBW, max | HRC, max |
| B7 | up to 2-1/2" | 125 | 105 | 16 | 50 | 321 | 35 |
| 2-5/8" - 4" | 115 | 95 | 16 | 50 |
| 4-1/8" - 7" | 100 | 75 | 18 | 50 |
| B8 Class 1 | all | 75 | 30 | 30 | 50 | 223 | 35 |
| B8 Class 2 | up to 3/4" | 125 | 100 | 12 | 35 | 321 | 35 |
| 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 |
| B8M Class 1 | all | 75 | 30 | 30 | 50 | 223 | 96 |
| B8M Class 2 | up to 3/4" | 110 | 95 | 15 | 45 | 321 | 35 |
| 7/8" - 1" | 100 | 80 | 20 | 45 |
| 1-1/8" - 1-1/4" | 95 | 65 | 25 | 45 |
| 1-3/8" - 1-1/2" | 90 | 50 | 30 | 45 |
| B16 | under 2-1/2" | 125 | 105 | 18 | 50 | 321 | 35 |
| over 2-1/2" - 4" | 110 | 95 | 17 | 45 |
| over 4" - 8" | 100 | 85 | 16 | 45 |
| A193 CHEMICAL PROPERTIES |
| Element | Grade B7 | Grade B8 | Grade B8M | Grade B16 |
| Carbon | 0.37 - 0.49% | 0.08% max | 0.08% max | 0.36 - 0.47% |
| Manganese | 0.65 - 1.1% | 2.0% max | 2.0% max | 0.45 - 0.7% |
| Phosphorus, max | 0.04% | 0.05% | 0.05% | 0.04% |
| Sulfur, max | 0.04% | 0.03% | 0.03% | 0.04% |
| Silicon | 0.15 - 0.35% | 1.0% max | 1.0% max | 0.15 - 0.35% |
| Chromium | 0.75 - 1.2% | 18.0 - 20.0% | 16.0 - 18.0% | 0.8 - 1.15% |
| Nickel | | 8.0 - 11.0% | 10.0 - 14.0% | |
| Molybdenum | 0.15 - 0.25% | | 2.0 - 3.0% | 0.5 - 0.65% |
| Vanadium | | | | 0.25 - 0.35% |
| Aluminum, max | | | | 0.02% |
| A193 RECOMMENDED HARDWARE |
| Grade | Nut | Washer |
| B7 | A194 Grade 2H | F436 |
| B8 Class 1 | A194 Grade 8 | 304 Stainless |
| B8 Class 2 | A194 Grade 8 | 304 Stainless |
| B8M Class 1 | A194 Grade 8M | 316 Stainless |
| B8M Class 2 | A194 Grade 8M | 316 Stainless |
| B16 | A194 Grade 7 | F436 |
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A193 Grade B8 Threaded Stud Bolt Images
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