ASTM A193 B7 stud bolt with two ASTM A194 2H nuts
ANSI/ASME b18.2.1 Fully Threaded Stud Bolts
ASME B18.2.2 Hex Nuts
Type: Stud Bolts and Nuts.
Material: ASTM A193 B7, ASTM A194 2H.
Standard: ASME B18.2.1, ASME B18.2.2.
I. Strength Grades
| DIN 931/933 | Grade 4.6, 4.8, 5.6, 5.8, 8.8, 10.9, 12.9 |
| DIN 931/933 | SUS 304, 316 |
| ASTM A307 | Grade A & B |
| ASTM A320, A320M | Grade L7, L7M, B8, B8M |
| ASTM A325, A325M | Grade 8.8 |
| ASTM A490, A490M | Grade 10.9 |
| ASTM A193/A193M | Grade B7, B7M, B8, B8M, B16 |
Surface Treatments
-
- Plating
- Zinc (White / Yellow / Black)
- Cadmium (White / Yellow / Black)
- Zinc Nickel
- Plating
-
- Galvanising
- Hot-Dipped Galvanise
- Mechanical Galvanise
- Galvanising
-
- Fluorocarbon Coating
Xylan® / PTFE Coating Systems:- Xylar 2
- 1070
- 1424
- Fluorocarbon Coating
- Customised Coating Systems
- Zinc + Fluorocarbon / PTFE
- Cadmium + Fluorocarbon /PTFE
- Zinc Nickel + Fluorocarbon /PTFE
- Zinc Plating + Xylan 1424 Blue coated stud bolt
- Xylar 2 + Xylan 1070 Blue coated stud bolt
STAINLESS STEEL
A193 B6 – Heat treated 410 stainless (410HT)
A193 B8 – Produced to grade AISI 304, carbide solution treated, standardly available in class 1
A193 B8M – Produced to grade AISI 316, carbide solution treated, standardly available in class 1
A193 B8C- Grade 347 stainless material
A193 B8T – Grade 321 stainless material
A320 B8 – Produced to grade AISI 304, carbide solution treated, standardly available in class 1
A320 B8M – Produced to grade AISI 316, carbide solution treated, standardly available in class 1
| 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 |
