American Standard A193 B7 Stud Bolts Manufacturer In China
Ningbo Teng Qi Fasteners Co., Ltd is a leading a193 b7 stud bolts manufacturer in China. A193 B7 stud bolts are a type of American Standard high-strength, heat-treated threaded fastener commonly used in various industrial applications, particularly in the oil and gas, petrochemical, and power generation industries. Our A193 b7 stud bolts are produced exactly as specified in the standard documentation.
We use high-quality alloy steel AISI4140 for production, and the chemical composition fully meets the standard requirements. Strictly control the quenching/tempering time and temperature, quenching in the medium of oil, tempering temperature is not less than 593 degrees Celsius. To achieve the required mechanical properties, including high tensile strength, good fatigue resistance, and high temperature capability. We mainly provide A193 B7 stud bolts to domestic and foreign medium and large fastener distributors. The main export markets are the United States, Mexico, Brazil, Argentina, United Arab Emirates, Saudi Arabia, and Europe.
Specification of A193 B7 Stud Bolts:
A193 B7 stud bolts are often used in conjunction with A194 2H nuts, which are also high-strength fasteners designed to be used together in various applications where high pressure and temperature conditions are present.
These stud bolts are used in critical applications such as flanged connections in piping systems, pressure vessels, valves, and other equipment subjected to high mechanical loads and extreme temperature conditions. It’s important to use the appropriate grade of stud bolts and nuts based on the specific requirements of the application to ensure safety and reliability.
| Product name | ASTM A193 B7 Stud Bolts |
|---|---|
| Diameter | 1/4″ – 4″ |
| Dimension Standard | ASME B18.31.2 |
| Thread | UNC/UNF/8UN |
| Tension Strength | 125 KSI |
| Compatible nuts/washers | A194 2H heavy hex nuts |
| Manufacturing Process | wire drawing, thread rolling, heat treatment, surface treatment |
| Surface treatment | Black Oxide Coating/Zinc Plating (Electroplating)/Hot-Dip Galvanizing/Mechanical Galvanizing/Dacromet Coating/Painting or Powder Coating |
| Application Industry | Piping Systems/Pressure Vessels/Pressure Vessels/Oil and Gas Industry/Power Generation/Chemical Processing |
Chemical Composition:
| Property class | Material and heat treatment | Chemical composition limits (cast analysis, %) a |
||||||
|---|---|---|---|---|---|---|---|---|
| A193 B7 | Alloy steel, AISI 4140/4142 quenched and tempered | Carbon | Manganese | Phosphorus, max | Sulfur, max | Silicon | Chromium | Molybdenum |
| 0.37 - 0.49% | 0.65 - 1.10% | 0.035% | 0.040% | 0.15 - 0.35% | 0.75-1.2% | 0.15 - 0.25% | ||
Mechanical and physical properties:
| Grade | Size | Tensile ksi, min | Yield, ksi, min | Elong, %, min | RA % min | HBW | Rockwell |
|---|---|---|---|---|---|---|---|
| B7 | Up to 2-1/2 | 125 | 105 | 16 | 50 | 321 max | 35 HRC max |
| 2-5/8 - 4 | 115 | 95 | 16 | 50 | |||
| 4-1/8 - 7 | 100 | 75 | 18 | 50 |
Dimension Chart of American Standard A193 B7 Stud Bolts:
| Thread Diameter | Thread Per Inch | Chamfered Thread Distance | ||||
|---|---|---|---|---|---|---|
| UNC | UNF | 8UN | UNC | UNF | 8UN | |
| 1/4 | 20 | 28 | - | 0.05-0.1 | 0.036-0.071 | - |
| 5/16 | 18 | 24 | - | 0.056-0.111 | 0.042-0.083 | - |
| 3/8 | 16 | 24 | - | 0.063-0.125 | 0.042-0.083 | - |
| 7/16 | 14 | 20 | - | 0.072-0.143 | 0.05-0.1 | - |
| 1/2 | 13 | 20 | - | 0.077-0.154 | 0.05-0.1 | - |
| 9/16 | 12 | 18 | - | 0.084-0.167 | 0.056-0.111 | - |
| 5/8 | 11 | 18 | - | 0.091-0.182 | 0.056-0.111 | - |
| 3/4 | 10 | 16 | - | 0.1-0.2 | 0.063-0.125 | - |
| 7/8 | 9 | 14 | - | 0.111-0.222 | 0.072-0.143 | - |
| 1 | 8 | 12 | - | 0.125-0.25 | 0.084-0.167 | - |
| 1-1/8 | 7 | 12 | - | 0.143-0.286 | 0.084-0.167 | - |
| 1-1/4 | 7 | 12 | - | 0.143-0.286 | 0.084-0.167 | - |
| 1-3/8 | 6 | 12 | - | 0.167-0.333 | 0.084-0.167 | - |
| 1-1/2 | 6 | 12 | - | 0.167-0.333 | 0.084-0.167 | - |
| 1-5/8 | - | - | 8 | 0.125-0.25 | ||
| 1-3/4 | 5 | - | 8 | 0.2-0.4 | 0.125-0.25 | |
| 1-7/8 | - | - | 8 | 0.125-0.25 | ||
| 2 | 4-1/2 | - | 8 | 0.222-0.444 | 0.125-0.25 | |
| 2-1/4 | 4-1/2 | - | 8 | 0.222-0.444 | 0.125-0.25 | |
| 2-1/2 | 4 | - | 8 | 0.25-0.5 | 0.125-0.25 | |
| 2-3/4 | 4 | - | 8 | 0.25-0.5 | 0.125-0.25 | |
| 3 | 4 | - | 8 | 0.25-0.5 | 0.125-0.25 | |
| 3-1/4 | 4 | - | 8 | 0.25-0.5 | 0.125-0.25 | |
| 3-1/2 | 4 | - | 8 | 0.25-0.5 | 0.125-0.25 | |
| 3-3/4 | 4 | - | 8 | 0.25-0.5 | 0.125-0.25 | |
| 4 | 4 | - | 8 | 0.25-0.5 | 0.125-0.25 | |
FAQ about A193 B7 Stud Bolts:
1.What’s the price of type1 of A193 b7 stud bolts?
In general, our A193 b7 stud bolt are made of alloy steel 42crmoa. The price is made up of materials, processing, packaging and labor costs. We are focused on the production of bolts/nuts factory, committed to making our customers profitable. The wholesale price of A193 b7 stud bolts is 1500-2000usd/ton. The material price of steel will fluctuate frequently, and the price is different for different surface treatment/quantity, so please send the inquiry to our email for the specific price. Emai: info@china-bolts.com
2.How many days does it take you to produce a container of stud bolts?
Our daily production capacity of A193 b7 stud bolt is about 20 tons, but due to the arrangement of materials, heat treatment, surface treatment, order scheduling takes time. The average delivery time of bolts for a container is 30-40 days.
3.What countries do you export your a193 b7 stud bolt to? Whether mechanical properties can be guaranteed.
We have stable customers in the United States, Germany, Russia, Poland, Spain, Brazil, Argentina, Vietnam, Canada, Australia, UAE, Saudi Arabia and other countries for more than 10 years. Our bolts are guaranteed to meet ASTM A193 standard mechanical performance requirements.
4.Can you provide samples of A193 b7 stud bolt?
Yes, we have some samples in regular sizes. Samples can be provided free of charge. But the customer needs to bear the freight.
5. Do you have a minimum order quantity requirement?
Yes, the MOQ we usually produce is about one ton.