Description
ASTM A193 / ASME SA193 - GRADE B8
SS 304 Full Threaded Studs | ASTM A193 B8
SS 304 Full Threaded Studs ASTM A193 B8 are austenitic stainless steel studs for industrial bolting, piping, flanges, valves and pressure equipment. Grade B8 is based on Type 304 stainless steel (UNS S30400). The studs are available in metric and inch sizes, with standard and custom lengths.
SS 304 Full Threaded Studs - Sizes, Prices & Direct Links
Buy online: the SS304 Studs catalogue currently shows 31 products, with 21 listings at 1000 mm and 10 listings at 2000 mm. The table below gives the current listed price and a direct product link for each size. Prices can change, so the linked product page is the final price reference.
VIEW ALL SS304 STUDS| Size | Length | Listed Price | Online |
|---|---|---|---|
| 1/4" | 1000 mm | ₹80 | BUY ONLINE |
| 1/4" | 2000 mm | ₹160 | BUY ONLINE |
| 5/16" | 1000 mm | ₹110 | BUY ONLINE |
| 5/16" | 2000 mm | ₹210 | BUY ONLINE |
| 3/8" | 1000 mm | ₹150 | BUY ONLINE |
| 3/8" | 2000 mm | ₹295 | BUY ONLINE |
| 1/2" | 1000 mm | ₹265 | BUY ONLINE |
| 1/2" | 2000 mm | ₹550 | BUY ONLINE |
| 5/8" | 1000 mm | ₹420 | BUY ONLINE |
| 5/8" | 2000 mm | ₹850 | BUY ONLINE |
| 3/4" | 1000 mm | ₹615 | BUY ONLINE |
| 3/4" | 2000 mm | ₹1,300 | BUY ONLINE |
| 7/8" | 1000 mm | ₹930 | BUY ONLINE |
| 7/8" | 2000 mm | ₹1,900 | BUY ONLINE |
| M6 | 1000 mm | ₹62 | BUY ONLINE |
| M6 | 2000 mm | ₹121 | BUY ONLINE |
| M8 | 1000 mm | ₹110 | BUY ONLINE |
| M8 | 2000 mm | ₹210 | BUY ONLINE |
| M10 | 1000 mm | ₹165 | BUY ONLINE |
| M10 | 2000 mm | ₹330 | BUY ONLINE |
| M12 | 1000 mm | ₹240 | BUY ONLINE |
| M12 | 2000 mm | ₹477 | BUY ONLINE |
| M14 | 1000 mm | ₹330 | BUY ONLINE |
| M16 | 1000 mm | ₹440 | BUY ONLINE |
| M16 | 2000 mm | ₹875 | BUY ONLINE |
| M18 | 1000 mm | ₹550 | BUY ONLINE |
| M20 | 1000 mm | ₹685 | BUY ONLINE |
| M20 | 2000 mm | ₹1,400 | BUY ONLINE |
| M22 | 1000 mm | ₹855 | BUY ONLINE |
| M24 | 1000 mm | ₹990 | BUY ONLINE |
| M24 | 2000 mm | ₹2,000 | BUY ONLINE |
Catalogue check: SS304 filter checked on 18 September 2026. The online catalogue reports 31 SS304 stud products. citeturn1view0turn2view0
Technical Overview
ASTM A193 Grade B8 is used for stainless steel bolting in high-temperature, high-pressure and other special-purpose service. The specification covers austenitic stainless steels that may be carbide solution treated or carbide solution treated and strain hardened. citeturn4search6turn4search8
| Parameter | Specification |
|---|---|
| Material | SS304 / Type 304 / UNS S30400 |
| Grade | ASTM A193 Grade B8 |
| Classes | Class 1 and Class 2 |
| Stud Type | Full Threaded Stud |
| Thread | Metric and inch; thread form to order |
| Length | Standard 1000 mm / 2000 mm online sizes; custom lengths on enquiry |
Key Features
- Manufactured from austenitic SS304 stainless steel.
- Good general corrosion and oxidation resistance.
- Full threading allows nut engagement along the required length.
- Available in metric and inch sizes.
- Suitable for flange, piping, valve, fabrication and industrial assemblies.
- Class 1 provides the solution-treated condition; Class 2 adds controlled strain hardening for higher specified strength.
Chemical Composition - ASTM A193 Grade B8
| Element | Requirement, % |
|---|---|
| Carbon (C) | 0.08 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
| Chromium (Cr) | 18.0 - 20.0 |
| Nickel (Ni) | 8.0 - 11.0 |
| Molybdenum (Mo) | Not specified for Grade B8 |
| Iron (Fe) | Balance |
Composition limits above follow published ASTM A193 Grade B8 chemistry tables. citeturn4search0turn4search15
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 - Strain Hardened
| Diameter Range | Tensile, MPa min | Yield, MPa min | Elongation min | RA min | Hardness max |
|---|---|---|---|---|---|
| Up to 3/4 in | 860 | 690 | 12% | 35% | 321 HBW / 35 HRC |
| 7/8 - 1 in | 795 | 550 | 15% | 35% | 321 HBW / 35 HRC |
| 1-1/8 - 1-1/4 in | 725 | 450 | 20% | 35% | 321 HBW / 35 HRC |
| 1-3/8 - 1-1/2 in | 690 | 345 | 28% | 45% | 321 HBW / 35 HRC |
Class 2 strength depends on diameter and strain-hardening condition. The standard should be checked for the ordered diameter and current edition requirements. citeturn4search1turn4search9
Physical Properties - SS304
| Property | Typical Value |
|---|---|
| Density | Approximately 7.9 - 8.0 g/cm3 |
| Elastic Modulus | Approximately 193 GPa |
| Poisson's Ratio | Approximately 0.29 - 0.30 |
| Shear Modulus | Approximately 74 GPa |
| Melting Range | Approximately 1400 - 1450 deg C |
| Thermal Conductivity | Approximately 16 W/m.K at room temperature |
| Specific Heat | Approximately 500 J/kg.K |
| Thermal Expansion | Approximately 17 x 10-6 /deg C |
Physical values are typical material data and are not ASTM A193 acceptance criteria.
Metric Stud Dimensions & Thread Pitch - M8 to M48
The table gives common metric coarse pitches for size selection. Overall stud length is specified separately. For a certified ASTM A193 B8 product, confirm diameter, length, class, thread form and applicable dimensional standard on the purchase order.
| Size | 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 & Thread Pitch - 3/8 in to 2-1/2 in
UNC and BSW are separate thread systems. Use the specified thread system on the enquiry. Do not treat UNC and BSW as 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 & Quenching
Class 1 - Carbide Solution Treated
Grade B8 Class 1 is supplied in the carbide-solution-treated condition. Published A193 B8 references describe solution treatment at approximately 1900 - 1950 deg F (1040 - 1065 deg C), followed by rapid cooling, normally water quenching, to retain corrosion resistance.
Class 2 - Solution Treated & Strain Hardened
Class 2 starts with carbide solution treatment and then receives controlled strain hardening. This cold-worked condition raises the specified tensile and yield strength.
Typical Applications
Why Aanuraj
- Manufacturer of stainless steel and exotic-grade threaded fasteners.
- Metric and inch full threaded studs for industrial requirements.
- Custom diameter, length and thread configurations available subject to specification.
- Material traceability and inspection documentation available as required.
- Technical support for grade, class, thread, size and manufacturing requirements.
Technical Enquiry
For quotation, specify ASTM A193 Grade B8, Class 1 or Class 2, SS304 / UNS S30400, diameter, length, thread system, pitch or TPI, quantity and certification requirements.
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Technical Reference
ASTM A193/A193M is the governing bolting specification for the ordered product. Current edition requirements, purchase order, drawing, thread standard, class, heat treatment, testing and certification shall govern the supplied fastener. ASTM states that A193 covers alloy-steel and stainless-steel bolting for high-temperature, high-pressure and other special-purpose applications. citeturn4search6turn4search8
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