Description
ASTM A193 Grade B8M SS316 Studs | Full Threaded Studs
ASTM A193 Grade B8M stainless steel studs are austenitic SS316 / UNS S31600 fasteners specified for pressure vessels, valves, flanges, fittings and other demanding industrial bolting applications. Aanuraj supplies full threaded studs in metric and inch sizes with Class 1 and Class 2 options, subject to the specified dimensional, heat-treatment and mechanical requirements.
SS316 Full Threaded Studs - Sizes & Online Prices
We checked the SS316 filtered Studs catalogue on NutsAndBoltsOnline.in. The current catalogue shows 25 SS316 products, including metric and inch sizes in 1000 mm and 2000 mm lengths. Click BUY ONLINE beside any size to open that exact product.
| Size | Length | Price | Online |
|---|---|---|---|
| 5/16" | 1000 mm | ₹260 | BUY ONLINE |
| 3/8" | 1000 mm | ₹250 | BUY ONLINE |
| 1/2" | 1000 mm | ₹450 | BUY ONLINE |
| 1/2" | 2000 mm | ₹900 | BUY ONLINE |
| 5/8" | 1000 mm | ₹700 | BUY ONLINE |
| 5/8" | 2000 mm | ₹1,400 | BUY ONLINE |
| 3/4" | 1000 mm | ₹1,020 | BUY ONLINE |
| 3/4" | 2000 mm | ₹2,050 | BUY ONLINE |
| 7/8" | 1000 mm | ₹1,500 | BUY ONLINE |
| 7/8" | 2000 mm | ₹3,000 | BUY ONLINE |
| M6 | 1000 mm | ₹110 | BUY ONLINE |
| M6 | 2000 mm | ₹190 | BUY ONLINE |
| M8 | 1000 mm | ₹200 | BUY ONLINE |
| M10 | 1000 mm | ₹300 | BUY ONLINE |
| M10 | 2000 mm | ₹580 | BUY ONLINE |
| M12 | 1000 mm | ₹400 | BUY ONLINE |
| M12 | 2000 mm | ₹800 | BUY ONLINE |
| M14 | 1000 mm | ₹560 | BUY ONLINE |
| M16 | 1000 mm | ₹750 | BUY ONLINE |
| M16 | 2000 mm | ₹1,500 | BUY ONLINE |
| M18 | 1000 mm | ₹950 | BUY ONLINE |
| M20 | 1000 mm | ₹1,150 | BUY ONLINE |
| M20 | 2000 mm | ₹2,280 | BUY ONLINE |
| M22 | 1000 mm | ₹1,450 | BUY ONLINE |
| M24 | 1000 mm | ₹1,670 | BUY ONLINE |
| M24 | 2000 mm | ₹3,300 | BUY ONLINE |
Price note: Prices shown are the current prices displayed on the SS316 filtered online catalogue when checked on 18 September 2026. Online prices and availability can change; the linked product page is the final reference.
Technical Overview
Key Features
- Manufactured from corrosion-resistant austenitic stainless steel grade SS316.
- Molybdenum-bearing chemistry provides improved resistance to pitting and crevice corrosion compared with conventional 18-8 stainless steels.
- Suitable for flange, valve, piping, pressure-vessel and industrial bolting assemblies where ASTM A193 B8M is specified.
- Available as fully threaded studs for continuous nut engagement along the required length.
- Metric and inch sizes, standard and custom lengths available subject to manufacturing capability.
- Class 2 B8M uses solution treatment followed by strain hardening to achieve higher specified strength than the baseline Class 1 condition.
Chemical Composition - ASTM A193 Grade B8M
| Element | Requirement, % | Function / Comment |
|---|---|---|
| Carbon (C) | 0.08 max | Low carbon austenitic stainless steel |
| Manganese (Mn) | 2.00 max | Deoxidation and alloy balance |
| Silicon (Si) | 1.00 max | Deoxidation |
| Phosphorus (P) | 0.045 max | Controlled residual element |
| Sulfur (S) | 0.030 max | Controlled residual element |
| Chromium (Cr) | 16.0 - 18.0 | Corrosion and oxidation resistance |
| Nickel (Ni) | 10.0 - 14.0 | Austenitic structure |
| Molybdenum (Mo) | 2.00 - 3.00 | Improves pitting and crevice corrosion resistance |
| Iron (Fe) | Balance | Base element |
Mechanical Properties
Class 1 - Carbide Solution Treated
| Property | Minimum / Maximum |
|---|---|
| Tensile Strength | 515 MPa min / 75 ksi min |
| Yield Strength, 0.2% offset | 205 MPa min / 30 ksi min |
| Elongation in 4D | 30% min |
| Reduction of Area | 50% min |
| Hardness | 223 HBW or 96 HRB max |
Class 2 - Solution Treated and Strain Hardened
| Diameter Range | Tensile, MPa min | Yield, MPa min | Elongation min | RA min | Hardness max |
|---|---|---|---|---|---|
| M20 and under | 760 | 655 | 15% | 45% | 321 HBW / 35 HRC |
| Over M20 to M24 | 690 | 550 | 20% | 45% | 321 HBW / 35 HRC |
| Over M24 to M30 | 655 | 450 | 25% | 45% | 321 HBW / 35 HRC |
| Over M30 to M36 | 620 | 345 | 30% | 45% | 321 HBW / 35 HRC |
Physical Properties - SS316
| Property | Typical Value |
|---|---|
| Density | Approximately 7.9 - 8.0 g/cm3 |
| Elastic Modulus | Approximately 195 GPa |
| Poisson's Ratio | Approximately 0.30 |
| Shear Modulus | Approximately 77 GPa |
| Melting Range | Approximately 1370 - 1400 deg C |
| Thermal Conductivity | Approximately 16 W/m.K at room temperature |
| Specific Heat | Approximately 500 J/kg.K |
| Thermal Expansion | Approximately 16 x 10-6 /deg C |
Physical properties are typical material values and are not acceptance criteria under ASTM A193. Actual properties vary with temperature, condition and product form.
Stud Dimensions and Metric Thread Pitch - M8 to M48
Metric coarse pitch is shown for general dimensional selection. Stud overall length is specified separately by the purchaser. For a certified ASTM A193 B8M product, the ordered diameter, length, thread form, class and applicable dimensional standard should be stated on the enquiry or purchase order.
| Nominal Size | Nominal Diameter, mm | Coarse Pitch, mm | Thread Designation |
|---|---|---|---|
| M8 | 8 | 1.25 | M8 x 1.25 |
| M10 | 10 | 1.50 | M10 x 1.50 |
| M12 | 12 | 1.75 | M12 x 1.75 |
| M14 | 14 | 2.00 | M14 x 2.00 |
| M16 | 16 | 2.00 | M16 x 2.00 |
| M18 | 18 | 2.50 | M18 x 2.50 |
| M20 | 20 | 2.50 | M20 x 2.50 |
| M22 | 22 | 2.50 | M22 x 2.50 |
| M24 | 24 | 3.00 | M24 x 3.00 |
| M27 | 27 | 3.00 | M27 x 3.00 |
| M30 | 30 | 3.50 | M30 x 3.50 |
| M33 | 33 | 3.50 | M33 x 3.50 |
| M36 | 36 | 4.00 | M36 x 4.00 |
| M39 | 39 | 4.00 | M39 x 4.00 |
| M42 | 42 | 4.50 | M42 x 4.50 |
| M45 | 45 | 4.50 | M45 x 4.50 |
| M48 | 48 | 5.00 | M48 x 5.00 |
Inch Stud Dimensions and Thread Pitch - 3/8 in to 2-1/2 in
UNC and BSW are different thread systems. UNC values below are shown separately from BSW for customers who specifically require British Standard Whitworth threading. They are not interchangeable.
| Nominal Size | Diameter, mm | UNC TPI | UNC Pitch, mm | BSW TPI | BSW Pitch, mm |
|---|---|---|---|---|---|
| 3/8 | 9.525 | 16 | 1.5875 | 16 | 1.5875 |
| 7/16 | 11.113 | 14 | 1.8143 | 14 | 1.8143 |
| 1/2 | 12.700 | 13 | 1.9538 | 12 | 2.1167 |
| 9/16 | 14.288 | 12 | 2.1167 | 12 | 2.1167 |
| 5/8 | 15.875 | 11 | 2.3091 | 11 | 2.3091 |
| 3/4 | 19.050 | 10 | 2.5400 | 10 | 2.5400 |
| 7/8 | 22.225 | 9 | 2.8222 | 9 | 2.8222 |
| 1 | 25.400 | 8 | 3.1750 | 8 | 3.1750 |
| 1-1/8 | 28.575 | 7 | 3.6286 | 7 | 3.6286 |
| 1-1/4 | 31.750 | 7 | 3.6286 | 7 | 3.6286 |
| 1-3/8 | 34.925 | 6 | 4.2333 | 6 | 4.2333 |
| 1-1/2 | 38.100 | 6 | 4.2333 | 6 | 4.2333 |
| 1-5/8 | 41.275 | 5 | 5.0800 | 5 | 5.0800 |
| 1-3/4 | 44.450 | 5 | 5.0800 | 5 | 5.0800 |
| 1-7/8 | 47.625 | 4.5 | 5.6444 | 4.5 | 5.6444 |
| 2 | 50.800 | 4.5 | 5.6444 | 4.5 | 5.6444 |
| 2-1/4 | 57.150 | 4.5 | 5.6444 | 4.5 | 5.6444 |
| 2-1/2 | 63.500 | 4 | 6.3500 | 4 | 6.3500 |
Solution Treatment and Quenching
Class 1 - Carbide Solution Treated
Grade B8M Class 1 is supplied in the carbide-solution-treated condition. Published B8M references describe solution treatment in the approximately 1900 - 2100 deg F (1040 - 1150 deg C) range, followed by rapid cooling to prevent chromium-carbide precipitation. The exact heat-treatment procedure and current ASTM edition requirements shall govern the supplied product.
Class 2 - Solution Treated + Strain Hardened
Class 2 material is carbide-solution treated and subsequently strain hardened to achieve the specified higher mechanical properties. The strengthening is produced by controlled cold work rather than conventional precipitation hardening.
Typical Applications
Why Aanuraj
- Specialist manufacturer of stainless steel and exotic-grade threaded fasteners.
- Capability for custom stud diameters, lengths and thread configurations subject to drawing and specification.
- Material traceability and inspection documentation available as required.
- Technical support for selecting grade, class, thread, size and manufacturing route.
- Metric and inch threaded fasteners for industrial B2B requirements.
Technical Enquiry
For quotation, please specify ASTM A193 Grade B8M, Class 1 or Class 2, SS316 / UNS S31600, stud diameter, overall length, thread system, pitch or TPI, quantity, finish and required certification.
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Technical Reference Note
This page is prepared as a product and engineering reference. ASTM A193/A193M is the governing bolting specification for the ordered product. The current edition is ASTM A193/A193M-26. Dimensional standards, thread form, class, heat treatment, testing, marking and certification requirements shall be confirmed against the applicable purchase order, drawing and current standard edition.
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