ASTM A193 B7 Stud Bolt
Stud bolt
A stud bolt is a threaded rod with threads on both ends, used to fasten two flanges together.
Stud bolt could be threaded as Metric Thread and UNC Thread as per ASME B18.31.2.
ASTM A193
Standard Specification for Alloy-Steel and Stainless Steel Bolting for High Temperature or High Pressure Service and Other Special Purpose Applications
ASTM A193 Grade B7 stud bolts are high strength fasteners manufactured from a chromium-molybdenum steel and are quenched and tempered.
ASTM A193 B7 Heat Treatment
A193 B7 and B7M shall be heat treated by quenching in a liquid medium and tempering. For B7M fasteners, the final heat treatment, which may be the tempering operation if conducted at 1150 °F [620 °C] minimum, shall be done after all machining and forming operations, including thread rolling and any type of cutting. Surface preparation for hardness testing, nondestructive evaluation, or ultrasonic bolt tensioning is permitted.
Unless otherwise specified, material for Grade B7 may be heat treated by the Furnace, the Induction or the Electrical Resistance method.
ASTM A193 B7 Stud Bolt Manufacture (Process)
The steel shall be produced by any of the following processes: open-hearth, basic-oxygen, electric-furnace, or vacuum-induction melting (VIM). The molten steel may be vacuum-treated prior to or during pouring of the ingot or strand casting. 5.2 Quality—See Specification A962/A962M for requirements
ASTM A193 B7 Chemical Composition
Each alloy shall conform to the chemical composition requirements prescribed in Table 1. 8.2 The steel shall not contain an unspecified element for the ordered grade to the extent that the steel conforms to the requirements of another grade for which that element is a specified element. Furthermore, elements present in concentrations greater than 0.75 weight/% shall be reported.
| C | Mn | Si | P | S | Cr | Mo |
|---|---|---|---|---|---|---|
| 0.37-0.49 | 0.65-1.10 | 0.15-0.35 | 0.035 | 0.04 | 0.75-1.20 | 0.15-0.25 |
A193 B7 Stud Bolt Mechanical Properties
A193 B7 Hardness Requirements:
B7 stud bolt should have the harndesss Max 321 HB or 35 HRC
Hex nuts for A193 B7 Stud bolt
Bolts, studs, and stud bolts shall be furnished with nuts, when specified in the purchase order.
Nuts shall conform to Specification A194/A194M
Normally A193 B7 Stud bolts are supplied with A194 grade 2H Hex nuts
A193 B7 Stud bolt Certification
The producer of the raw material or finished fasteners shall furnish a certification to the purchaser or his representative showing the results of the chemical analysis, macroetch examination (Carbon and Alloy Steels Only), and mechanical tests, and state the method of heat treatment employed.
Certification shall also include at least the following:
A statement that the material or the fasteners, or both, were manufactured, sampled, tested, and inspected in accordance with the specification and any supplementary requirements or other requirements designated in the purchase order or contract and was found to meet those requirements.
The specification number, year date, and identification symbol.
A193 B7 Stud Bolt Surface Treatments
We can provide the ASTM A193 B7 stud bolt with 2 ASTM A194 2H nuts,with following different surface treatments
-
- Plating
- Zinc (White / Yellow / Black)
- Cadmium (White / Yellow / Black)
- Zinc Nickel
- ZINC PLATED/BICHROMATE TREATED
- Plating
-
- Galvanising
- Hot-Dipped Galvanise
- Mechanical Galvanise
- Galvanising
-
- Fluorocarbon Coating
Xylan® / Dupont Coating Systems:- Xylar 2
- Xylan 1070
- Xylan 1424
- Fluorocarbon Coating
- Customised Coating Systems
- Zinc + Fluorocarbon / PTFE coated stud bolt
- Cadmium + Fluorocarbon /PTFE coated stud bolt
- Zinc Nickel + Fluorocarbon /PTFE coated stud bolt
- Zinc Plating + Xylan 1424 Blue PTFE coated stud bolt
- Xylar 2 + Xylan 1070 coated stud bolt
- stud bolt ZINC PLATED/BICHROMATE TREATED
- Zinc Yellow Bichromated
Order Description for STUD BOLT,
DIA X LENGTH
FULLY THREADED, C/W 2 HEAVY HEXAGON NUTS,
MATL STUDBOLTS ASTM A193 GRADE B7: NUTS ASTM A194 GRADE 2H,
8UN THREADS TO ANSI B1.1 & TOLERANCES TO B1.1 CL 2A FOR STUDBOLTS & ANSI B18.2.2 CL 2B FOR NUTS
SB2N,B7,2H,8UN,1.1/2in,255mm Studbolts With nut
What is SB2N,it refers to stud bolt 2 NUTS.
Mat spec, stud bolt(s) ASTM A193 GRADE B7
Mat spec, nut(s) ASTM A194 GRADE 2H
Design spec, stud bolt BS 4882
Design spec, nut ASME B18.2.2
BS 4882
Thread class symbol, stud bolt ASME B1.1 CLASS 2A
Thread class symbol, nut ASME B1.1 CLASS 2B
Type of thread ASME B1.1 SERIES 8-UN
