We are a leading SA 320 Gr B8 Hex Bolts manufacturer in India
Verified suppliers of ASTM A320 Grade B8 heavy hex bolts and A320 B8 hex cap screws as per API, ASTM, BS, EN, JIS, DIN standards
ASTM A320 B8 bolts
SA 320 Gr B8 hex bolt
ASTM A320 Grade B8 heavy hex bolt
Manufacturing SA 320 B8 socket head bolts and ASTM A 320 Gr B8 anchor bolts in various threads and metric sizes, contact Hilton Steel for free sample
Table of Content
ASTM A320 B8 bolts specifications
| Size | Length | Hardness | Specifications |
|---|---|---|---|
| M10 – M110 | 12 -1200MM | 223 HBW / 96 HRC | ASTM A320  / ASME SA320 |
| Diameter | Thread | International Standard | Application |
| 3/8″ – 4″ | BSW, METRIC, UNF, UNC, BSF, custom | BS, UNI, ANSI, ISO, IS, JIS, GB, ASME, DIN |
|
| Temperature range | Iso Standard | Head Drive | Coating |
| -200-650°C | ISO 4033, ISO 4032 | Phillips/Slot, Phillips, Slotted, Six-Lobe | PTFE, zinc plated, black phosphate, hot dip galvanized |
SA 320 Grade B8 square bolts and ASTM A320 Gr B8 flange bolts used for medium-high temperature applications
Types of SA 320 Gr B8 hex bolts
A320 B8 hex cap screws
- Sizes: M10 – M110
- Length: 12 -1200MM
SA 320 B8 socket head bolts
- Diameter: 3/8″ – 4″
- Temperature range: -200-650°C
ASTM A 320 Gr B8 anchor bolts
- Yield strength (ksi [MPa]): 30 [205]
- Tensile strength (ksi [MPa]): 75 [515]
SA 320 Grade B8 square bolts
- Hardness: 223 HBW / 96 HRC
- Equivalent to: AISI type 304 stainless steel
ASTM A320 Gr B8 flange bolts
- Coatings: zinc plating, hot dip galvanising, PTFE
- Head type: Hex, round, hex flange, flat, square
SA320 B8 carriage bolts
- Thread type : Metric, Metric course, UNF, BA, BSF, UNC, UN8, BSW
We have a wide range of SA320 B8 carriage bolts and ASTM A320 GrB8 machine bolts in various designs, diameters, and lengths as per DIN 931 standards
ASTM A320 Grade B8 heavy hex bolts chemical composition
| Element | Composition, % A |
|---|---|
| Chromium Molybdenum B | |
| Manganese, maximum | 2.00 |
| Carbon, maximum | 0.08 |
| Phosphorus, maximum | 0.045 |
| Silicon, maximum | 1.00 |
| Sulfur, maximum | 0.030 |
| Chromium | 18.00 – 20.00 |
| Nickel | 8.00 – 11.00 |
A320 B8 hex cap screws mechanical properties
| Diameter, inch [mm] |
Yield Strength minimum, ksi [MPa] (0.2% offset) | Tensile Strength, minimum, ksi [MPa] | Reduction of Area, minimum, % | Elongation in 2 inch or 50 milimeter, minimum, % | Hardness, maximum | |
|---|---|---|---|---|---|---|
| HBW | HRC | |||||
| All Diameters | 30 [205] | 75 [515] | 50 | 30 | 223D | 96 |
equivalent of SA 320 B8 socket head bolts
| B8 Class 1 Stainless steel | AISI 304, carbide solution treated |
|---|---|
| B8 Class 2 Stainless steel | AISI 304, carbide solution treated, strain hardened |
ASTM A 320 Gr B8 anchor bolt recommended grades
| Bolt Grade | Washer Grade | Nut Grade |
|---|---|---|
| A320 Grade B8 Class 1 | A240 TP304 | A194 Grade 8 (S1) |
| A320M Grade B8 Class 1 | A240M TP304 | A194M Grade 8 (S1) |
SA 320 Grade B8 square bolts impact test requirement
| Size of Specimen, mm | minimum impact value required for average of each set of three specimens, ft-lbf [J] | Test Temperature | minimum impact value permitted for one specimen only of a set, ft-lbf [J] | |
|---|---|---|---|---|
| °F | °C | |||
| 10 X 10 | 20 [27] | -150 | -101 | 15 [20] |
| 10 X 7.5 | 16 [22] | 12 [16] | ||