Fastening Solutions: 24/7 – Always Ready to Power Your Industrial Needs
Fastening Solutions: 24/7 – Always Ready to Power Your Industrial Needs
Fastening Solutions: 24/7 – Always Ready to Power Your Industrial Needs
Fastening Solutions: 24/7 – Always Ready to Power Your Industrial Needs
Delta Fitt Inc. is a trusted B8M Stud Bolts Manufacturer In India with over 34 years of experience in the fastener industry. We specialize in manufacturing and supplying high-quality ASTM A193 B8M Stud bolts that meet international standards and deliver reliable performance in demanding environments. We use advanced technology and top materials to offer 316 stainless steel fasteners with molybdenum for excellent corrosion resistance in oil & gas, petrochemical, power, and marine applications.
As a leading B8M Stud Bolts Supplier In India, we serve industries needing strong bolts for high pressure, heat, and chemicals. Our B8M Class 1 and Class 2 bolts ensure safety, strength, and long life. With strict quality control, competitive prices, and fast delivery, we export to global markets too.
B8M Stud Bolts are high-performance stainless steel fasteners manufactured as per the ASTM A193 Grade B8M standard. These bolts are made from AISI Type 316 austenitic stainless steel, which contains molybdenum — making them exceptionally resistant to corrosion, especially in chloride-rich and acidic environments. They are widely used in pressure vessels, pipelines, chemical plants, marine engineering, and power generation, where reliability and durability are critical.
We are a trusted B8M Stud Bolts Manufacturer In India offering a complete range of ASTM A193 B8M fasteners for demanding industrial applications. Our Bolts are tested, certified, and ready for global supply.
ASTM A193 Grade B8M stud bolts (316/316L stainless steel) for high-pressure, high-temperature service with superior corrosion resistance. Class 1 solution treated (75 ksi), Class 2 strain hardened (100 ksi). Sizes M12-M100.
| Property | Specification / Range | Notes |
|---|---|---|
| Material | Austenitic stainless steel | Typically 316/316L |
| Grade | B8M | M indicates molybdenum alloyed stainless steel |
| Thread Type | UNC / UNF / Metric | Depends on application; usually threaded both ends |
| Diameter Range | 1/4″ – 2″ (6 mm – 50 mm) | Standard diameters; can be custom |
| Length | 1″ – 72″ (25 mm – 1800 mm) | Standard or as per client requirement |
| Tensile Strength | ≥ 75 ksi (515 MPa) | Minimum per ASTM A193 |
| Proof Load | 50–55 ksi (345–380 MPa) | Minimum stress before permanent deformation |
| Hardness | ≤ 95 HRB | Ensures ductility |
| Temperature Range | -320°F to 1500°F (-196°C to 815°C) | Resistant to high temperature corrosion |
| Corrosion Resistance | Excellent | Resistant to acids, alkalis, and saltwater |
| Applications | Pressure vessels, flanges, valves, petrochemical plants | Especially where corrosion resistance is critical |
| Standards | ASTM A193 / ASME B18.2.1 | Industry reference standards |
| Parameter | Details |
|---|---|
| Product Name | B8M Stud Bolts (ASTM A193 B8M) |
| Material | AISI 316 Stainless Steel |
| Standard | ASTM A193, ASME B18.2.1 |
| Size Range | M6 to M100 / 1/4" to 4" |
| Finish | Plain, Passivated, Electropolished |
| Head Type | Hex, Heavy Hex, Socket Head |
| Manufacturer | Delta Fitt Inc., India |
The ASTM A193 specification covers alloy steel and stainless steel bolting materials for high-temperature or high-pressure service. Grade B8M falls under this standard and refers to bolts made from Type 316 stainless steel, which includes molybdenum for enhanced pitting corrosion resistance.
B8M Stud Bolts come in two strength classes:
| Element | Min (%) | Max (%) | Grade |
|---|---|---|---|
| Carbon (C) | – | 0.08 max | 316 SS |
| Chromium (Cr) | 16.00 | 18.00 | 316 SS |
| Nickel (Ni) | 10.00 | 14.00 | 316 SS |
| Molybdenum (Mo) | 2.00 | 3.00 | 316 SS |
| Manganese (Mn) | – | 2.00 max | 316 SS |
The presence of Molybdenum (2–3%) differentiates B8M Stud Bolts from B8 Stud Bolts (Grade 304 SS) and provides superior protection against crevice corrosion and pitting in marine and chemical environments.
ASTM A193 B8M Stud bolts offer excellent mechanical performance, with Class 1 and Class 2 options providing reliable tensile strength, yield strength, elongation, and hardness for demanding industrial applications. Below is the table showing Class 1 and Class 2 mechanical properties of B8M Stud Bolts
| Property | Class 1 | Class 2 |
|---|---|---|
| Tensile Strength | 75 ksi (515 MPa) | 100 ksi (690 MPa) |
| Yield Strength | 30 ksi (205 MPa) | 80 ksi (550 MPa) |
| Elongation | 30% min | 20% min |
| Hardness | HRB 100 max | HRC 35 max |
B8M Stud Bolts are available in a wide range of diameters, lengths, and thread pitches to suit various industrial applications. The table below provides a quick reference for standard sizes, with custom lengths and thread forms available on request.
| Diameter (Inch) | Diameter (Metric) | Length Range | Thread Pitch (mm) |
|---|---|---|---|
| 1/4" | M6 | 10mm – 200mm | 1.00 |
| 3/8" | M10 | 15mm – 300mm | 1.50 |
| 1/2" | M12 | 20mm – 400mm | 1.75 |
| 3/4" | M20 | 25mm – 500mm | 2.50 |
| 1" | M24 | 30mm – 600mm | 3.00 |
| Up to 4" | Up to M100 | Custom Lengths | As per DIN/ISO |
Custom sizes and non-standard thread forms (UNC, UNF, Metric) are also available on request.
Delta Fitt Inc. manufactures the following types of ASTM A193 Grade B8M Fasteners:
| Industry | Application |
|---|---|
| Oil & Gas | Flanges, Valves, Pressure Vessels |
| Chemical Processing | Reactor Flanges, Pipe Fittings |
| Marine Engineering | Offshore Platforms, Subsea Equipment |
| Pharmaceutical | Hygienic Piping Systems |
| Power Generation | Turbines, Heat Exchangers |
| Food & Beverage | Processing Equipment, Storage Tanks |
The 316 stainless steel bolts grade used in B8M makes them ideal wherever chloride resistance, high temperature tolerance, and oxidation resistance are critical.
| Property | B8 Bolts (Grade 304) | B8M Bolts (Grade 316) |
|---|---|---|
| Material | AISI 304 SS | AISI 316 SS |
| Molybdenum | None | 2–3% |
| Corrosion Resistance | Good | Excellent (Chlorides) |
| Best For | General Industry | Marine, Chemical, Offshore |
| ASTM Standard | ASTM A193 B8 Stud Bolts | ASTM A193 B8M Stud Bolts |
Every batch of B8M Stud bolts undergoes strict quality checks before dispatch:
| Feature | Delta Fitt Inc. Advantage |
|---|---|
| Experience | 34+ Years in Fastener Manufacturing Industry |
| Certifications | ISO 9001:2015, PED, NACE MR0175, Merkblatt AD 2000 W2, EN 10204 / 3.1, Import Export Certificate (IEC), Third-Party Inspection, PED 97/23/EC Certified |
| Export Markets | USA, UK, UAE, Iran, Russia, Brazil, Europe, Canada, Qatar |
| Testing | Third-Party & In-House Lab Testing |
| Lead Time | Stock Available; Custom: 7–15 Days |
| MOQ | No Minimum Order Quantity |
Delta Fitt Inc. is one of the most reliable B8M Stud Bolts Manufacturers and Suppliers In India. We serve clients across the oil & gas, petrochemical, power, and marine sectors with consistent quality and on-time delivery.
We offer safe industrial packaging to prevent corrosion or damage during transit:
Delta Fitt Inc is one of the top ASTM A193 B8M Stud Bolts Suppliers in India. The ASTM A193 B8M Stud Bolts are available in various technical specifications to meet the client's needs. We supply to different top cities such as New Delhi, Hyderabad, Ahmedabad, Jaipur and so on.
As an established B8M Stud Bolts Supplier In India, Delta Fitt Inc. exports to over 40 countries. Our stainless steel B8M fasteners reach clients in the USA, UAE, UK, Saudi Arabia, Germany, Australia, Singapore, and more.
We offer competitive pricing for B8M Stud Bolts with fast lead times backed by ready stock and a modern manufacturing facility.
Q1. What is the difference between B8 Stud Bolts and B8M Stud Bolts?
B8 bolts are made from Grade 304 stainless steel, while B8M Stud Bolts are made from Grade 316 SS with added molybdenum, offering superior resistance to chloride corrosion and harsh chemicals.
Q2. Are B8M Stud Bolts suitable for high-temperature service?
Yes. ASTM A193 B8M Stud Bolts are suitable for elevated temperatures up to 700°F (370°C) for Class 1 and higher for Class 2, making them widely used in refineries and power plants.
Q3. What nuts and washers should be used with B8M Stud Bolts?
B8M bolts are typically paired with ASTM A194 Grade 8M heavy hex nuts and corresponding stainless steel washers to ensure compatibility in pressure applications.
Q4. Can Delta Fitt Inc. supply custom-length B8M bolts?
Yes. We manufacture custom-length B8M Stud Bolts and hex bolts based on your drawings and project requirements. Send us your specifications for a quick quote.
Q5. What certifications do Delta Fitt Inc. B8M Stud Bolts carry?
Our bolts carry ISO 9001:2015, NACE MR0175, PED 2014/68/EU certifications and are supplied with Mill Test Reports (MTR), EN 10204 3.1 / 3.2 documentation.
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