ASTM A193 Grade B8 Class 2 Bolts
A193 Grade B8 Class 2 Bolts are manufactured from AISI 304 Stainless Steel carbide solution treated with Strain Hardening. We manufacture these Bolts with great precision & Quality.Grade B8 Bolts are also called B8 Stainless Steel bolts, B8 Bolts Etc.We at RELIABLE PIPES & TUBES LTD. Stock & Supply these Bolt Fasteners in various sizes & Coatings.
Related Keywords for ASTM A193 Grade B8 Class 2 Bolts : Grade 8 Bolts,Grade B8 bolts,Gr 8 Bolts,B8 Class 2,A193 B8 Bolts,B8 Studs,B8 Bolting etc.
| 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 |
| B16 |
A heat-treated chromium-molybdenum-vanadium steel for high-pressure, high-temperature service. |
Mechanical Properties
Bolt -Grade Identification Markings
| Grade |
Size |
Tensile ksi, min |
Yield, ksi, min |
Elong, %, min |
RA % min |
| B7 |
Up to 2-1/2 |
125 |
105 |
16 |
50 |
| 2-5/8 - 4 |
115 |
95 |
16 |
50 |
| 4-1/8 - 7 |
100 |
75 |
18 |
50 |
| B8 Class 1 |
All |
75 |
30 |
30 |
50 |
| B8M Class 1 |
All |
75 |
30 |
30 |
50 |
| B8 Class 2 |
Up to 3/4 |
125 |
100 |
12 |
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 2 |
Up to 3/4 |
110 |
95 |
15 |
45 |
| 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 |
Up to 2-1/2 |
125 |
105 |
18 |
50 |
| 2-5/8 - 4 |
110 |
95 |
17 |
45 |
| 4-1/8 - 7 |
100 |
85 |
16 |
45 |
Material Chemical Composition
| Element |
B7 (AISI 4140) |
B8 (AISI 304) |
B8M (AISI 316) |
B16 (AISI 4140) |
| Carbon |
0.37 - 0.49% |
0.08% max |
0.08% max |
0.37 - 0.49% |
| Manganese |
0.65 - 1.10% |
2.00% max |
2.00% max |
0.65 - 1.10% |
| Phosphorus, max |
0.035% |
0.045% |
0.045% |
0.035% |
| Sulfur, max |
0.040% |
0.030% |
0.030% |
0.040% |
| Silicon |
0.15 - 0.35% |
1.00% max |
1.00% max |
0.15 - 0.35% |
| Chromium |
0.75 - 1.20% |
18.0 - 20.0% |
16.0 - 18.0% |
0.75 - 1.20% |
| Nickel |
|
8.0 - 11.0% |
10.0 - 14.0% |
|
| Molybdenum |
0.15 - 0.25% |
|
2.00 - 3.00% |
0.15 - 0.25% |
Recommended Nuts,Bolts & Washer
| Bolt Grade |
Nuts |
Washers |
| B7 |
A194 Grade 2H |
F436 |
| B8 Class 1 |
A194 Grade 8 |
SS304 |
| B8M Class 1 |
A194 Grade 8M |
SS316 |
| B8 Class 2 |
A194 Grade 8 |
SS304 |
| B8M Class 2 |
A194 Grade 8M |
SS316 |
