ASME SA194 Carbon Steel Bolts are high-strength bolting components designed for demanding industrial applications where reliable mechanical performance and controlled material properties are required. These fasteners are commonly used with pressure vessels, valves, flanges, piping systems, and high-pressure equipment.
Our range of SA194 Carbon Steel Fasteners includes heavy hex bolts, stud bolts, nuts, and flange bolting manufactured according to applicable ASTM/ASME requirements. Grade 2H is widely selected for general high-strength applications, while Grade 2HM is used where additional requirements such as sour-service suitability under NACE MR0175 / ISO 15156 are specified.
We supply ASME SA194 Bolts and Nuts in different sizes, thread configurations, finishes, and dimensions to meet project-specific requirements. Material testing, dimensional inspection, hardness testing, and other quality checks can be performed according to the applicable specification and purchase requirements.
What Are ASME SA194 Carbon Steel Bolts?
ASME SA194 Carbon Steel Bolts are high-strength carbon steel bolting components manufactured to the requirements of ASTM A194/A194M, which is referenced by ASME specifications. The specification primarily covers carbon, alloy, and stainless steel nuts intended for pressure vessel, valve, flange, and high-temperature or high-pressure service.
In commercial usage, SA194 grades such as Grade 2H and Grade 2HM are commonly paired with suitable high-strength bolting products for industrial flange and piping assemblies.
The most important characteristics include:
- High tensile and yield strength
- Controlled hardness
- Good resistance to deformation under load
- Suitability for high-pressure bolting applications
- Availability in heavy hex configurations
- Compatibility with industrial flange and piping assemblies
- Grade options for demanding service conditions
ASME SA194 Carbon Steel Bolts are high-strength industrial fasteners used for pressure vessels, flanges, valves, and piping systems. Grade 2H is a common high-strength grade, while Grade 2HM is used for applications requiring controlled hardness and sour-service requirements such as NACE MR0175 / ISO 15156.
Table of Contents
- ➤ What Are ASME SA194 Carbon Steel Bolts?
- ➤ ASME SA194 Carbon Steel Bolts Types
- ➤ SA194 Carbon Steel Bolting Grades
- ➤ Equivalent Grades of SA194 Carbon Steel Bolts
- ➤ ASME SA194 Carbon Steel Bolts Specifications
- ➤ ASME SA194 Carbon Steel Bolts Weight Chart
- ➤ Manufacturing Process of SA194 Carbon Steel Bolting
- ➤ Applications of ASME SA194 Carbon Steel Bolts
- ➤ Why Choose Our ASME SA194 Carbon Steel Fasteners?
- ➤ Get a Quote for ASME SA194 Carbon Steel Bolts
ASME SA194 Carbon Steel Bolts Types
Different fastening configurations are available depending on the joint design, installation method, and application.
➤ ASME SA194 Heavy Hex Bolts
Heavy hex bolts have a larger head than standard hex bolts, providing a greater bearing surface for tightening and load transfer. ASME SA194 Heavy Hex Fasteners are commonly specified for structural and pressure-containing industrial assemblies.
➤ ASME SA194 Grade 2H Bolts and Nuts
Grade 2H is a widely used high-strength carbon steel grade for industrial bolting applications. ASME SA194 Grade 2H Bolts and Nuts are commonly used in piping, pressure vessels, flanges, and equipment connections.
➤ ASME SA194 Grade 2HM Fasteners
Grade 2HM fasteners are produced with controlled hardness requirements and are commonly selected for sour-service applications. ASME SA194 Grade 2HM Fasteners may be specified with NACE requirements where resistance to sulfide stress cracking is required.
➤ ASME SA194 Flange Stud Bolts
ASME SA194 Flange Stud Bolts are used to connect flanged piping, valves, pressure vessels, and other equipment. Studs can provide full-thread engagement and are frequently used with heavy hex nuts.
➤ ASME B18.2.1 Hex Cap Screws
Where dimensional requirements call for hex head cap screws, ASME B18.2.1 Hex Cap Screws can be supplied according to the applicable dimensional standard. Material and dimensional requirements should be specified separately to ensure the complete fastener matches the application.
➤ SA194 Carbon Steel Stud Bolts
Stud bolts are threaded rods used with nuts at one or both ends depending on the design. They are widely used for flange connections because they allow controlled tightening and convenient installation in confined areas.
SA194 Carbon Steel Bolting Grades
| Grade | General Description | Typical Application |
|---|---|---|
| SA194 Grade 2 | Carbon steel nut grade | General pressure applications |
| SA194 Grade 2H | High-strength carbon steel | Flanges, pressure vessels, piping |
| SA194 Grade 2HM | Controlled-hardness grade | Sour-service applications |
| SA194 Grade 7 | Alloy steel | High-temperature/high-pressure applications |
| SA194 Grade 7M | Controlled-hardness alloy grade | Sour-service applications |
Equivalent Grades of SA194 Carbon Steel Bolts
| Standard / Grade | Equivalent / Related Designation | Material |
|---|---|---|
| ASTM A194 Grade 2H | ASME SA194 Grade 2H | Carbon Steel |
| ASTM A194 Grade 2HM | ASME SA194 Grade 2HM | Carbon Steel |
| ASTM A194 Grade 2 | ASME SA194 Grade 2 | Carbon Steel |
| ASTM A194/A194M | ASME SA194/SA194M | Carbon & Alloy Steel |
| NACE MR0175 / ISO 15156 | Applicable 2HM requirements | Sour-Service Bolting |
ASME SA194 Carbon Steel Bolts Specifications
| Parameter | Details |
|---|---|
| Product | Carbon Steel Bolts, Stud Bolts & Nuts |
| Material Specification | ASTM A194 / ASME SA194 |
| Common Grades | 2, 2H, 2HM |
| Product Forms | Heavy Hex Bolts, Stud Bolts, Nuts, Flange Bolting |
| Dimensional Standard | ASME B18.2.1 / B18.2.2 as applicable |
| Thread Standard | ASME B1.1 / Project Specification |
| Thread Type | UNC, UNF and other specified threads |
| Heat Treatment | As specified for applicable grade |
| Surface Finish | Plain, Zinc Plated or Project-Specified Finish |
| Inspection | Dimensional, Visual, Hardness, Mechanical & PMI as applicable |
| Testing | As required by specification / purchase order |
| Sour Service | NACE MR0175 / ISO 15156 where applicable |
| Application | Flanges, Valves, Piping, Pressure Vessels & Equipment |
ASME SA194 Carbon Steel Bolts Weight Chart
| Nominal Size | Approx. Weight per 100 Pieces* |
|---|---|
| 1/2" | 8–15 kg |
| 5/8" | 15–25 kg |
| 3/4" | 25–40 kg |
| 7/8" | 35–50 kg |
| 1" | 45–65 kg |
| 1-1/8" | 60–85 kg |
| 1-1/4" | 80–110 kg |
| 1-3/8" | 100–135 kg |
| 1-1/2" | 120–165 kg |
| 1-5/8" | 145–195 kg |
| 1-3/4" | 170–230 kg |
| 2" | 210–290 kg |
Manufacturing Process of SA194 Carbon Steel Bolting
Applications of ASME SA194 Carbon Steel Bolts
ASME SA194 Carbon Steel Bolts and associated bolting assemblies are used across industries where dependable fastening is essential.
- Oil and gas pipelines
- Refineries
- Petrochemical plants
- Chemical processing equipment
- Power generation plants
- Pressure vessels
- Heat exchangers
- Valves and flanges
- Industrial piping systems
- Offshore equipment
- Water treatment systems
- Process equipment
For sour-service applications, the material grade, hardness, heat treatment, and applicable NACE MR0175 / ISO 15156 requirements should be confirmed before ordering.
Why Choose Our ASME SA194 Carbon Steel Fasteners?
We focus on supplying industrial fasteners that meet the dimensional, material, and documentation requirements of demanding projects.
- Wide range of sizes and configurations
- Grade 2H and 2HM availability
- Heavy hex bolts and flange stud bolts
- Custom lengths and threading options
- Material traceability documentation
- Dimensional and visual inspection
- Third-party inspection support
- Export-quality packaging
- Domestic and international supply capability
- Technical support for grade and specification selection
If you require an ASME SA194 Heavy Hex Bolts Stockist for urgent requirements or a reliable ASME SA194 Carbon Steel Bolts Manufacturer in Mumbai for project quantities, we can supply according to your drawings, specifications, and purchase requirements.
Get a Quote for ASME SA194 Carbon Steel Bolts
Need reliable ASME SA194 Carbon Steel Bolts for your piping, pressure vessel, refinery, petrochemical, or industrial project?
Send us your required grade, dimensions, quantity, applicable standard, and delivery location. Our team will review your requirements and provide a suitable quotation.
Frequently Asked Questions
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