ASTM A320 Grade B8C Stud Bolt, ASTM A320 Grade B8C Threaded Rod, ASTM A320 Gr B8C Studs, Grade B8C Bolts Suplier in Mumbai, India.
Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service
This is the most common A320 bolt grade. A320 Grade B8C bolts, stud bolts, stud and threaded rod are manufactured from alloy steel with chromium, manganese, and molybdenum. The bolts undergo a heat treating process to reach their required mechanical properties. B8C threaded studs and short, headed bolts are readily available in the marketplace. These bolts are typically bought and sold in a plain, bare metal finish. B8C bolts are available through 2-1/2” in diameter. A320 Grade B8C bolts larger than 1/2″ diameter require a Charpy impact test.
Bolting A320 Grade B8C
| B8C |
AISI 347 Stainless Steel, Carbide Solution Treated |
ASTM A320 Grade B8C Chemical Composition
| Element |
Grade B8C |
| Carbon |
0.08 max |
| Manganese, max |
1.00 |
| Phosphorus, max |
0.040 |
| Sulfur, max |
0.030 |
| Silicon |
1.00 max |
| Nickel |
8.00 - 11.00 |
| Chromium |
18.0 - 20.0 |
ASTM A320 Grade B8C Mechanical Properties
| Grade |
Diameter |
Tensile, ksi, min |
Yield, ksi, min |
Charpy Impact 20-ft-lbf @ temp |
Elong, %, min |
RA, %, min |
| Class 1: B8C |
All |
75 |
30 |
N/A |
30 |
50 |
| Class 2: B8C |
Up to 3⁄4 |
125 |
100 |
N/A |
12 |
35 |
| 7⁄8 - 1 |
115 |
80 |
N/A |
15 |
35 |
| 11⁄8 - 11⁄4 |
105 |
65 |
N/A |
20 |
35 |
| 13⁄8 - 11⁄2 |
100 |
50 |
N/A |
28 |
45 |
A320 Grade B8C Recommended Hardware
| Grade |
Nuts |
Washers |
| B8C |
ASTM A194 Grade 8C |
AISI 347 |