Stainless Steel 310S Fasteners
Stainless Steel 310S Fasteners are high-performance threaded components made from SS 310S, a high-chromium, high-nickel austenitic stainless steel designed specifically for sustained elevated-temperature service. The alloy carries significantly higher chromium (24–26%) and nickel (19–22%) content than 304 or 316, which gives it exceptional oxidation resistance at temperatures where those grades would fail. These fasteners are the standard specification for furnace construction, heat treatment equipment, boiler assemblies, and any bolted joint that must hold integrity under continuous or cyclic thermal loading. They don't corrode in oxidising, high-temperature atmospheres; they resist carburisation and maintain their mechanical properties at temperatures that would soften lower-grade stainless fasteners.
Stainless Steel 310S Fasteners Price
The following price guide outlines the market variables and technical factors that influence the cost of Stainless Steel 310S fasteners in high-temperature industrial applications.
Price Per Unit / Kg
Stainless steel 310s fasteners price is between ₹500 and ₹1,200 per kg in the Indian market, reflecting the higher nickel and chromium content compared to 304 or 316. Export pricing moves with LME nickel and ferrochromium rates.
Factors Affecting Price
Raw material cost, specifically nickel and chromium, is the primary driver, as 310S carries a higher alloy content than 304 or 316. Grade certification, finish type, thread form, order quantity, and freight logistics all influence the final landed price.
Types of Stainless Steel 310S Fasteners
Explore the diverse range of high-temperature components listed below to find the ideal fastening solution needed.
- Stainless Steel 310S Hex Bolts
- Stainless Steel 310S Hex Nuts and Heavy Hex Nuts
- Stainless Steel 310S Stud Bolts
- Stainless Steel 310S Socket Head Cap Screws
- Stainless Steel 310S Machine Screws
- Stainless Steel 310S Eye Bolts and Hook Bolts
- Stainless Steel 310S Wing Nuts and Lock Nuts
- Stainless Steel 310S Flat Washers and Spring Washers
- Stainless Steel 310S Anchor Bolts and Foundation Bolts
- Stainless Steel 310S U-Bolts and J-Bolts
- Stainless Steel 310S Set Screws
- Stainless Steel 310S Carriage Bolts
Specifications of Stainless Steel 310S Fasteners
The table below contains the main specifications of SS 310S Fasteners, such as grade, form, size range and applicable standards.
|
Parameter |
Details |
|
Grade |
SS 310S Fasteners |
|
Specifications |
ASTM A193 / ASTM A194 |
|
Length |
3 mm to 2000 mm |
|
Size |
M3 – M56 | 3/16" to 2" | Custom Sizes |
|
Forms Available |
Nuts, Bolts, Washers, Screws, Studs |
|
Finish |
Mill Finish, Passivated, Electropolished |
|
Standards |
ASTM A193/A194, ISO 3506, DIN 933/934, BS 1769 |
Chemical Properties of Stainless Steel 310S Fasteners
Refer to the table below for the chemical composition of SS 310S Fasteners by element and percentage range.
|
Element |
Min (%) |
Max (%) |
|
Carbon (C) |
— |
0.08 |
|
Manganese (Mn) |
— |
2.0 |
|
Silicon (Si) |
— |
1.50 |
|
Phosphorus (P) |
— |
0.045 |
|
Sulphur (S) |
— |
0.030 |
|
Chromium (Cr) |
24.0 |
26.0 |
|
Nickel (Ni) |
19.0 |
22.0 |
|
Nitrogen (N) |
— |
— |
Mechanical Properties of Stainless Steel 310S Fasteners
The table below lists the mechanical property values for SS 310S Fasteners, including tensile strength, yield, and elongation.
|
Property |
Value |
|
Tensile Strength (min) |
515 MPa |
|
Yield Strength (0.2% offset, min) |
205 MPa |
|
Elongation (% in 50 mm, min) |
40% |
|
Hardness (Brinell, max) |
217 HB |
Physical Properties of Stainless Steel 310S Fasteners
The table below covers the physical properties of SS 310S Fasteners, including density, thermal conductivity, and electrical resistivity.
|
Property |
Value |
|
Density |
7980 kg/m³ |
|
Elastic Modulus |
200 GPa |
|
Thermal Conductivity (at 100 °C) |
14.2 W/m·K |
|
Mean Thermal Expansion (0–100 °C) |
15.9 µm/m/°C |
|
Specific Heat (0–100 °C) |
500 J/kg·K |
|
Electrical Resistivity |
780 nΩ·m |
Dimension Chart of Stainless Steel 310S Fasteners
Please refer to the following table for the precise dimensional requirements of ASTM A193 heavy hex bolts.
|
Nominal Size |
Body Dia. (Max) |
Body Dia. (Min) |
Head Height (Max) |
Head Height (Min) |
Width Flats (Max) |
Width Flats (Min) |
Width Corners (Max) |
Width Corners (Min) |
|
M10 |
10.00 |
9.78 |
6.63 |
6.17 |
17.00 |
15.73 |
18.48 |
17.77 |
|
M12 |
12.00 |
11.73 |
7.76 |
4.24 |
19.00 |
17.73 |
20.78 |
20.03 |
|
M14 |
14.00 |
13.73 |
9.09 |
8.51 |
22.00 |
20.67 |
24.25 |
23.35 |
|
M16 |
16.00 |
15.73 |
10.32 |
9.68 |
24.00 |
23.67 |
27.71 |
26.75 |
|
M20 |
20.00 |
19.67 |
12.88 |
12.12 |
30.00 |
29.16 |
34.64 |
32.95 |
|
M24 |
24.00 |
23.67 |
15.44 |
14.56 |
36.00 |
35.00 |
41.57 |
39.55 |
|
M30 |
30.00 |
29.67 |
19.48 |
17.92 |
46.00 |
45.00 |
53.12 |
50.85 |
|
M36 |
36.00 |
35.61 |
23.38 |
21.63 |
55.00 |
53.80 |
63.51 |
60.79 |
|
M42 |
42.00 |
41.38 |
26.97 |
25.03 |
65.00 |
62.90 |
75.06 |
71.71 |
|
M48 |
48.00 |
47.38 |
31.07 |
28.93 |
75.00 |
72.60 |
86.60 |
82.76 |
|
M56 |
56.00 |
55.26 |
36.20 |
33.80 |
85.00 |
82.20 |
98.15 |
93.71 |
|
M64 |
64.00 |
63.26 |
41.32 |
38.68 |
95.00 |
91.80 |
109.70 |
104.65 |
|
M72 |
72.00 |
71.26 |
46.45 |
43.55 |
105.00 |
101.40 |
121.24 |
115.60 |
|
M80 |
80.00 |
79.26 |
51.58 |
48.42 |
115.00 |
111.00 |
132.72 |
126.54 |
|
M90 |
90.00 |
89.13 |
57.74 |
54.26 |
130.00 |
125.50 |
150.11 |
143.07 |
|
M100 |
100.00 |
99.13 |
63.90 |
Size Chart of Stainless Steel 310S Fasteners
The size chart below covers standard thread sizes, diameters, length ranges, and applicable grade designations for SS 310S Fasteners.
|
Thread Size |
Diameter (mm) |
Standard Length Range (mm) |
Grade / Class |
|
M3 |
3.0 |
5 – 30 |
A2/A4 – ISO 3506 |
|
M6 |
6.0 |
10 – 100 |
A2/A4 – ISO 3506 |
|
M10 |
10.0 |
20 – 200 |
A193 B8 / A194 8 |
|
M16 |
16.0 |
30 – 300 |
A193 B8 / A194 8 |
|
M20 |
20.0 |
40 – 400 |
A193 B8 / A194 8 |
|
M30 |
30.0 |
60 – 600 |
A193 B8 / A194 8 |
|
M48 |
48.0 |
100 – 1000 |
Custom / A193 B8 |
|
1/4" |
6.35 |
1/2" – 4" |
ASTM A193 / A194 |
|
1/2" |
12.7 |
1" – 8" |
ASTM A193 / A194 |
|
1" |
25.4 |
2" – 16" |
ASTM A193 / A194 |
Torque Chart of Stainless Steel 310S Fasteners
The torque chart below recommends dry and lubricated torque values for SS 310S Fasteners in popular bolt sizes and thread shapes.
|
Bolt Size |
Threads Per Inch |
Dry Torque (in-lb) |
Lubricated Torque (in-lb) |
|
#6 |
32 |
9.0 |
6.8 |
|
#8 |
32 |
18.5 |
13.9 |
|
#10 |
24 |
21.5 |
16.1 |
|
1/4" |
20 |
72 |
54 |
|
5/16" |
18 |
125 |
94 |
|
3/8" |
16 |
225 |
169 |
|
1/2" |
13 |
495 |
371 |
|
5/8" |
11 |
1050 |
788 |
|
3/4" |
10 |
1460 |
1095 |
|
1" |
8 |
3280 |
2460 |
Key Features of Stainless Steel 310S Fasteners
The following points outline the core mechanical properties and thermal capabilities that distinguish 310S fasteners in industry.
- High oxidation resistance
- Carburisation/Sulphidation resistance
- 1050°C service limit
- Non-magnetic properties
- Ambient corrosion resistance
- Versatile thread forms
- Global standard compliance
- Specialised surface finishes
Applications of Stainless Steel 310S Fasteners
Refer to the following list for the primary industrial sectors and high-heat environments where these fasteners are utilised.
- Furnace and kilns
- Boilers and superheaters
- Petrochemical refinery furnaces
- Cement kiln infrastructure
- Power generation turbines
- Chemical processing equipment
- Aerospace support equipment
- High-temperature sterilisation systems
How to Choose the Right Stainless Steel 310S Fasteners Supplier?
Before placing an order for the Stainless Steel 310S Fasteners, kindly refer to the following points, as it will guide your procurement process smoothly and help you to get the appropriate material as per the project need.
Supplier Selection Criteria
A reliable stainless steel 310s fasteners supplier should carry a demonstrated stock of 310S-specific material, not simply 316 offered as a substitute. Make sure the supplier has delivered 310S to similar high-temperature applications and not just normal corrosion-resistant grades. Ask for references on furnace or boiler projects where 310S was expressly requested.
Technical Considerations
Confirm that the supplier works with both metric (DIN) and imperial (ASTM) thread standards, as heat treatment and furnace projects often involve mixed specifications from different engineering origins. For studs in flanged high-temperature joints, the specific ASTM A193 grade designation and corresponding A194 nut grade must be explicitly agreed in writing; a generic 'SS 310S' supply may not meet tensile class requirements under those standards.
Quality & Certification Check
Request EN 10204 3.1 mill test certificates for all orders, showing the real chemical composition and mechanical test results for the heat number supplied. At the supplier level, ISO 9001 accreditation means quality management processes are subject to external audits. For important applications, boiler pressure parts, code-stamped vessels and traceability of documents from mill to finished fastener are non-negotiable.
Procurement Tips for Bulk Orders
Vendor-qualifying a single source for frequent procurement reduces recurring quality review cycles and pricing leverage. One source for all 310S fastener types – bolts, nuts, washers and studs simplifies MTC matching and reduces audit overhead. 310S is a slower-moving grade, and lead times can be greater than 304 or 316. For big-volume orders, agree on a delivery schedule in advance of placing single bulk orders.
Stainless Steel 310S Fasteners are high-performance threaded components made from SS 310S, a high-chromium, high-nickel austenitic stainless steel designed specifically for sustained elevated-temperature service. The alloy carries significantly higher chromium (24–26%) and nickel (19–22%) content than 304 or 316, which gives it exceptional oxidation resistance at temperatures where those grades would fail. These fasteners are the standard specification for furnace construction, heat treatment equipment, boiler assemblies, and any bolted joint that must hold integrity under continuous or cyclic thermal loading. They don't corrode in oxidising, high-temperature atmospheres; they resist carburisation and maintain their mechanical properties at temperatures that would soften lower-grade stainless fasteners.
Stainless Steel 310S Fasteners Price
The following price guide outlines the market variables and technical factors that influence the cost of Stainless Steel 310S fasteners in high-temperature industrial applications.
Price Per Unit / Kg
Stainless steel 310s fasteners price is between ₹500 and ₹1,200 per kg in the Indian market, reflecting the higher nickel and chromium content compared to 304 or 316. Export pricing moves with LME nickel and ferrochromium rates.
Factors Affecting Price
Raw material cost, specifically nickel and chromium, is the primary driver, as 310S carries a higher alloy content than 304 or 316. Grade certification, finish type, thread form, order quantity, and freight logistics all influence the final landed price.
Types of Stainless Steel 310S Fasteners
Explore the diverse range of high-temperature components listed below to find the ideal fastening solution needed.
- Stainless Steel 310S Hex Bolts
- Stainless Steel 310S Hex Nuts and Heavy Hex Nuts
- Stainless Steel 310S Stud Bolts
- Stainless Steel 310S Socket Head Cap Screws
- Stainless Steel 310S Machine Screws
- Stainless Steel 310S Eye Bolts and Hook Bolts
- Stainless Steel 310S Wing Nuts and Lock Nuts
- Stainless Steel 310S Flat Washers and Spring Washers
- Stainless Steel 310S Anchor Bolts and Foundation Bolts
- Stainless Steel 310S U-Bolts and J-Bolts
- Stainless Steel 310S Set Screws
- Stainless Steel 310S Carriage Bolts
Specifications of Stainless Steel 310S Fasteners
The table below contains the main specifications of SS 310S Fasteners, such as grade, form, size range and applicable standards.
|
Parameter |
Details |
|
Grade |
SS 310S Fasteners |
|
Specifications |
ASTM A193 / ASTM A194 |
|
Length |
3 mm to 2000 mm |
|
Size |
M3 – M56 | 3/16" to 2" | Custom Sizes |
|
Forms Available |
Nuts, Bolts, Washers, Screws, Studs |
|
Finish |
Mill Finish, Passivated, Electropolished |
|
Standards |
ASTM A193/A194, ISO 3506, DIN 933/934, BS 1769 |
Chemical Properties of Stainless Steel 310S Fasteners
Refer to the table below for the chemical composition of SS 310S Fasteners by element and percentage range.
|
Element |
Min (%) |
Max (%) |
|
Carbon (C) |
— |
0.08 |
|
Manganese (Mn) |
— |
2.0 |
|
Silicon (Si) |
— |
1.50 |
|
Phosphorus (P) |
— |
0.045 |
|
Sulphur (S) |
— |
0.030 |
|
Chromium (Cr) |
24.0 |
26.0 |
|
Nickel (Ni) |
19.0 |
22.0 |
|
Nitrogen (N) |
— |
— |
Mechanical Properties of Stainless Steel 310S Fasteners
The table below lists the mechanical property values for SS 310S Fasteners, including tensile strength, yield, and elongation.
|
Property |
Value |
|
Tensile Strength (min) |
515 MPa |
|
Yield Strength (0.2% offset, min) |
205 MPa |
|
Elongation (% in 50 mm, min) |
40% |
|
Hardness (Brinell, max) |
217 HB |
Physical Properties of Stainless Steel 310S Fasteners
The table below covers the physical properties of SS 310S Fasteners, including density, thermal conductivity, and electrical resistivity.
|
Property |
Value |
|
Density |
7980 kg/m³ |
|
Elastic Modulus |
200 GPa |
|
Thermal Conductivity (at 100 °C) |
14.2 W/m·K |
|
Mean Thermal Expansion (0–100 °C) |
15.9 µm/m/°C |
|
Specific Heat (0–100 °C) |
500 J/kg·K |
|
Electrical Resistivity |
780 nΩ·m |
Dimension Chart of Stainless Steel 310S Fasteners
Please refer to the following table for the precise dimensional requirements of ASTM A193 heavy hex bolts.
|
Nominal Size |
Body Dia. (Max) |
Body Dia. (Min) |
Head Height (Max) |
Head Height (Min) |
Width Flats (Max) |
Width Flats (Min) |
Width Corners (Max) |
Width Corners (Min) |
|
M10 |
10.00 |
9.78 |
6.63 |
6.17 |
17.00 |
15.73 |
18.48 |
17.77 |
|
M12 |
12.00 |
11.73 |
7.76 |
4.24 |
19.00 |
17.73 |
20.78 |
20.03 |
|
M14 |
14.00 |
13.73 |
9.09 |
8.51 |
22.00 |
20.67 |
24.25 |
23.35 |
|
M16 |
16.00 |
15.73 |
10.32 |
9.68 |
24.00 |
23.67 |
27.71 |
26.75 |
|
M20 |
20.00 |
19.67 |
12.88 |
12.12 |
30.00 |
29.16 |
34.64 |
32.95 |
|
M24 |
24.00 |
23.67 |
15.44 |
14.56 |
36.00 |
35.00 |
41.57 |
39.55 |
|
M30 |
30.00 |
29.67 |
19.48 |
17.92 |
46.00 |
45.00 |
53.12 |
50.85 |
|
M36 |
36.00 |
35.61 |
23.38 |
21.63 |
55.00 |
53.80 |
63.51 |
60.79 |
|
M42 |
42.00 |
41.38 |
26.97 |
25.03 |
65.00 |
62.90 |
75.06 |
71.71 |
|
M48 |
48.00 |
47.38 |
31.07 |
28.93 |
75.00 |
72.60 |
86.60 |
82.76 |
|
M56 |
56.00 |
55.26 |
36.20 |
33.80 |
85.00 |
82.20 |
98.15 |
93.71 |
|
M64 |
64.00 |
63.26 |
41.32 |
38.68 |
95.00 |
91.80 |
109.70 |
104.65 |
|
M72 |
72.00 |
71.26 |
46.45 |
43.55 |
105.00 |
101.40 |
121.24 |
115.60 |
|
M80 |
80.00 |
79.26 |
51.58 |
48.42 |
115.00 |
111.00 |
132.72 |
126.54 |
|
M90 |
90.00 |
89.13 |
57.74 |
54.26 |
130.00 |
125.50 |
150.11 |
143.07 |
|
M100 |
100.00 |
99.13 |
63.90 |
Size Chart of Stainless Steel 310S Fasteners
The size chart below covers standard thread sizes, diameters, length ranges, and applicable grade designations for SS 310S Fasteners.
|
Thread Size |
Diameter (mm) |
Standard Length Range (mm) |
Grade / Class |
|
M3 |
3.0 |
5 – 30 |
A2/A4 – ISO 3506 |
|
M6 |
6.0 |
10 – 100 |
A2/A4 – ISO 3506 |
|
M10 |
10.0 |
20 – 200 |
A193 B8 / A194 8 |
|
M16 |
16.0 |
30 – 300 |
A193 B8 / A194 8 |
|
M20 |
20.0 |
40 – 400 |
A193 B8 / A194 8 |
|
M30 |
30.0 |
60 – 600 |
A193 B8 / A194 8 |
|
M48 |
48.0 |
100 – 1000 |
Custom / A193 B8 |
|
1/4" |
6.35 |
1/2" – 4" |
ASTM A193 / A194 |
|
1/2" |
12.7 |
1" – 8" |
ASTM A193 / A194 |
|
1" |
25.4 |
2" – 16" |
ASTM A193 / A194 |
Torque Chart of Stainless Steel 310S Fasteners
The torque chart below recommends dry and lubricated torque values for SS 310S Fasteners in popular bolt sizes and thread shapes.
|
Bolt Size |
Threads Per Inch |
Dry Torque (in-lb) |
Lubricated Torque (in-lb) |
|
#6 |
32 |
9.0 |
6.8 |
|
#8 |
32 |
18.5 |
13.9 |
|
#10 |
24 |
21.5 |
16.1 |
|
1/4" |
20 |
72 |
54 |
|
5/16" |
18 |
125 |
94 |
|
3/8" |
16 |
225 |
169 |
|
1/2" |
13 |
495 |
371 |
|
5/8" |
11 |
1050 |
788 |
|
3/4" |
10 |
1460 |
1095 |
|
1" |
8 |
3280 |
2460 |
Key Features of Stainless Steel 310S Fasteners
The following points outline the core mechanical properties and thermal capabilities that distinguish 310S fasteners in industry.
- High oxidation resistance
- Carburisation/Sulphidation resistance
- 1050°C service limit
- Non-magnetic properties
- Ambient corrosion resistance
- Versatile thread forms
- Global standard compliance
- Specialised surface finishes
Applications of Stainless Steel 310S Fasteners
Refer to the following list for the primary industrial sectors and high-heat environments where these fasteners are utilised.
- Furnace and kilns
- Boilers and superheaters
- Petrochemical refinery furnaces
- Cement kiln infrastructure
- Power generation turbines
- Chemical processing equipment
- Aerospace support equipment
- High-temperature sterilisation systems
How to Choose the Right Stainless Steel 310S Fasteners Supplier?
Before placing an order for the Stainless Steel 310S Fasteners, kindly refer to the following points, as it will guide your procurement process smoothly and help you to get the appropriate material as per the project need.
Supplier Selection Criteria
A reliable stainless steel 310s fasteners supplier should carry a demonstrated stock of 310S-specific material, not simply 316 offered as a substitute. Make sure the supplier has delivered 310S to similar high-temperature applications and not just normal corrosion-resistant grades. Ask for references on furnace or boiler projects where 310S was expressly requested.
Technical Considerations
Confirm that the supplier works with both metric (DIN) and imperial (ASTM) thread standards, as heat treatment and furnace projects often involve mixed specifications from different engineering origins. For studs in flanged high-temperature joints, the specific ASTM A193 grade designation and corresponding A194 nut grade must be explicitly agreed in writing; a generic 'SS 310S' supply may not meet tensile class requirements under those standards.
Quality & Certification Check
Request EN 10204 3.1 mill test certificates for all orders, showing the real chemical composition and mechanical test results for the heat number supplied. At the supplier level, ISO 9001 accreditation means quality management processes are subject to external audits. For important applications, boiler pressure parts, code-stamped vessels and traceability of documents from mill to finished fastener are non-negotiable.
Procurement Tips for Bulk Orders
Vendor-qualifying a single source for frequent procurement reduces recurring quality review cycles and pricing leverage. One source for all 310S fastener types – bolts, nuts, washers and studs simplifies MTC matching and reduces audit overhead. 310S is a slower-moving grade, and lead times can be greater than 304 or 316. For big-volume orders, agree on a delivery schedule in advance of placing single bulk orders.
Stainless Steel 310S Fasteners Suppliers
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Stainless Steel 310S Fasteners FAQ's
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