Stainless Steel 310 Flanges
Stainless Steel 310 Flanges are pipe connection components manufactured from UNS S31000, a high-chromium, high-nickel austenitic stainless steel containing chromium (24–26%) and nickel (19–22%). This composition gives SS 310 Flanges exceptional oxidation resistance at temperatures up to 1150°C in continuous service and 1040°C in intermittent service, making them the standard specification for high-temperature process piping, furnace systems, and heat treatment equipment where standard austenitic grades cannot operate reliably.
Stainless Steel 310 Flanges are available across all standard face types, pressure classes, and flange forms to ASTM A182 F310. They are chosen specifically for their ability to resist scaling, carburisation, and thermal fatigue in sustained elevated-temperature service. High alloy composition makes them far more resistant to oxidation and sulphidation than 304 or 316. Commonly used with high-temperature pipe and fittings in furnaces, kilns, and petrochemical process systems.
Price of Stainless Steel 310 Flanges
The pricing for Grade 310 flanges is influenced by daily raw material market fluctuations, specific pressure ratings, and the precision required for high-temperature industrial applications.
Price Per Unit / Kg
Stainless Steel 310 Flanges are priced between ₹950 and ₹2,600 per kg in the Indian market. International pricing tracks LME nickel rates closely. 310 contains 19–22% nickel, making it sensitive to nickel commodity movements. Stainless Steel 310 Flanges price also reflects the lower machinability of the high-alloy composition versus standard grades.
Factors Affecting Price
The main raw material cost drivers are high chrome (24-26%) and nickel (19-22%) content. Final unit pricing is dependent upon pressure class, size, face type, and ASTM A182 F310 certification. Verified SS 310 flanges suppliers with complete MTC traceability price at a premium over uncertified goods.
Types of Stainless Steel 310 Flanges
Discover our complete collection of Grade 310 high-temperature components designed for structural integrity in harsh thermal processing settings.
- Stainless Steel 310 Weld Neck Flanges (WN)
- Stainless Steel 310 Slip-On Flanges (SO)
- Stainless Steel 310 Blind Flanges (BL)
- Stainless Steel 310 Socket Weld Flanges (SW)
- Stainless Steel 310 Threaded Flanges (TH)
- Stainless Steel 310 Lap Joint Flanges (LJ)
- Stainless Steel 310 Long Weld Neck Flanges (LWN)
- Stainless Steel 310 Orifice Flanges
- Stainless Steel 310 Reducing Flanges
- Stainless Steel 310 Spectacle Blind Flanges
- Stainless Steel 310 Ring Type Joint (RTJ) Flanges
Specifications of Stainless Steel 310 Flanges
The specifications of Stainless Steel 310 Flanges, including size, standard, and pressure class, are listed in the table below.
|
Parameter |
Verified Details |
|
Manufacturing Standards |
ASTM A182 (Forged), ASTM A240 (Plate) |
|
Standard Size Range |
1/8" NB to 48" NB (Standard stock); Up to 60" NB or custom sizes available via fabrication |
|
Common Flange Types |
Weld Neck, Slip-On, Blind, Socket Weld, Threaded/Screwed, Lap Joint, Orifice, Spectacle Blind |
|
Production Technique |
Forged, Hot Rolled, Precision Machined, Heat Treated |
|
Surface Finish |
Smooth Finish, Serrated Finish (Concentric/Spiral), Cold Drawn |
Chemical Properties of Stainless Steel 310 Flanges
The chemical composition of Stainless Steel 310 Flanges, including its proportions, is listed in the table below.
|
Grade |
C |
Mn |
Si |
P |
S |
Cr |
Ni |
N |
|
310 Min |
— |
— |
— |
— |
— |
24.0 |
19.0 |
— |
|
310 Max |
0.25 |
2.0 |
1.50 |
0.045 |
0.030 |
26.0 |
22.0 |
— |
Mechanical Properties of Stainless Steel 310 Flanges
Below is a table showing the tensile strength and yield strength as well as the elongation of Stainless Steel 310 Flanges.
|
Property |
Value |
|
Tensile Strength |
515 MPa min |
|
Yield Strength (0.2% Offset) |
205 MPa min |
|
Elongation (% in 50 mm) |
40% min |
|
Hardness (Brinell) |
217 HB max |
Physical Properties of Stainless Steel 310 Flanges
The physical properties of Stainless Steel 310 Flanges are listed in the table below, along with density and thermal conductivity.
|
Grade |
Density (kg/m³) |
Elastic Modulus (GPa) |
Mean Co-eff of Thermal Expansion (µm/m/°C) 0–100°C |
Thermal Conductivity (W/m.K) at 100°C |
Specific Heat (J/kg.K) |
Elec Resistivity (nΩ.m) |
|
310 |
7900 |
200 |
15.9 |
14.2 |
500 |
780 |
Dimension Chart of Stainless Steel 310 Flanges
Review the metric dimensions for Class 150 flanges to ensure accurate fitting and installation within your piping network.
|
NB Size |
OD of Flange (mm) |
Bolt Circle Dia (mm) |
No. of Bolts |
Bolt Size |
Flange Thickness (mm) |
|
1/2" |
88.9 |
60.3 |
4 |
M14 |
9.5 |
|
1" |
108.0 |
79.4 |
4 |
M14 |
11.2 |
|
2" |
152.4 |
120.7 |
4 |
M18 |
17.5 |
|
3" |
190.5 |
152.4 |
4 |
M18 |
22.3 |
|
4" |
228.6 |
190.5 |
8 |
M18 |
22.3 |
|
6" |
279.4 |
241.3 |
8 |
M20 |
23.9 |
|
8" |
342.9 |
298.5 |
8 |
M20 |
27.0 |
|
10" |
406.4 |
362.0 |
12 |
M24 |
28.6 |
|
12" |
482.6 |
431.8 |
12 |
Dimensions per ASME B16.5 Class 150. Confirm dimensions for other pressure classes with your supplier.
Size Chart of Stainless Steel 310 Flanges
Use the Class 150 pipe flange size table below for correct alignment and fastening of your piping system.
|
Nominal Pipe Size (NPS) |
Flange Diameter (Inches) |
Number of Bolts |
Bolt Diameter (Inches) |
Bolt Hole Diameter (Inches) |
Bolt Circle (Inches) |
|
1/4" |
3.375 |
4 |
1/2" |
0.62 |
2.25 |
|
1/2" |
3.50 |
4 |
1/2" |
0.62 |
2.375 |
|
3/4" |
3.875 |
4 |
1/2" |
0.62 |
2.75 |
|
1" |
4.25 |
4 |
1/2" |
0.62 |
3.125 |
|
1-1/4" |
4.625 |
4 |
1/2" |
0.62 |
3.50 |
|
1-1/2" |
5.00 |
4 |
1/2" |
0.62 |
3.875 |
|
2" |
6.00 |
4 |
5/8" |
0.75 |
4.75 |
|
2-1/2" |
7.00 |
4 |
5/8" |
0.75 |
5.50 |
|
3" |
7.50 |
4 |
5/8" |
0.75 |
6.00 |
|
3-1/2" |
8.50 |
8 |
5/8" |
0.75 |
7.00 |
|
4" |
9.00 |
8 |
5/8" |
0.75 |
7.50 |
|
5" |
10.00 |
8 |
3/4" |
0.88 |
8.50 |
|
6" |
11.00 |
8 |
3/4" |
0.88 |
9.50 |
|
8" |
13.50 |
8 |
3/4" |
0.88 |
11.75 |
|
10" |
16.00 |
12 |
7/8" |
1.00 |
14.25 |
|
12" |
19.00 |
12 |
7/8" |
1.00 |
17.00 |
|
14" |
21.00 |
12 |
1" |
1.12 |
18.75 |
|
16" |
23.50 |
16 |
1" |
1.12 |
21.25 |
|
18" |
25.00 |
16 |
1-1/8" |
1.25 |
22.75 |
|
20" |
27.50 |
20 |
1-1/8" |
1.25 |
25.00 |
|
24" |
32.00 |
20 |
1-1/4" |
Pressure Rating Chart of Stainless Steel 310 Flanges
Review the pressure-temperature limits for Grade 310 flanges to ensure safe operation across various thermal ranges.
|
Pressure Class |
–29 to 38°C |
100°C |
200°C |
300°C |
|
Class 150 |
20.0 |
17.7 |
15.8 |
14.0 |
|
Class 300 |
51.7 |
46.2 |
41.2 |
36.6 |
|
Class 600 |
103.4 |
92.4 |
82.5 |
73.3 |
|
Class 900 |
155.1 |
138.6 |
123.7 |
109.9 |
|
Class 1500 |
258.6 |
230.9 |
206.2 |
183.2 |
|
Class 2500 |
430.9 |
384.9 |
343.7 |
Pressure ratings per ASME B16.5 for Group 2.2 (SS 310). Always verify with the relevant ASME B16.5 table for your exact service temperature.
Key Features of Stainless Steel 310 Flanges
Review the following points to get the details of the key features for the Stainless Steel 310 Flanges that make it an ideal choice for many industries.
- Oxidation Resistance
- Carburisation Resistance
- Thermal Stability
- Fatigue Resistance
- Weld Compatibility
- Standard Facings
- Non-Magnetic
- Code Compliance
Applications of Stainless Steel 310 Flanges
Explore the demanding industrial sectors and high-temperature process lines where these components are utilised.
- Industrial Furnaces
- Petrochemical Reformers
- Incinerator Systems
- Power Generation
- Chemical Processing
- Cement Plants
- Heat Exchangers
- Boiler Systems
- Aerospace Facilities
How to Choose the Right Stainless Steel 310 Flanges Supplier?
Before placing an order for the material for your project, it's always better to prepare an accurate plan, and the following pointers will help you to manage your procurement.
Supplier Selection Criteria
Verify the supplier provides mill test certificates with full heat and lot traceability confirming UNS S31000 composition. SS 310 and 310S are closely related but have different carbon limits. Confirm which grade your specification requires and check the MTC accordingly. Always request EN 10204 3.1 as a minimum; EN 10204 3.2 is required for pressure equipment and ASME-coded systems.
Technical Considerations
Confirm flange standard and pressure class before ordering. ASME B16.5 covers up to 24" NB; ASME B16.47 covers 26" and above. When used in high-temperature service, ensure the flange material grade is compatible with the pipe and fitting grade so that the junction does not suffer from galvanic or thermal mismatch. For ASME pressure systems, be sure to use material certified to ASTM A182 F310, not converted bar or plate stock.
Quality & Certification Check
Prioritise Stainless Steel 310 flange suppliers with ISO 9001:2015 certification and third-party inspection capability from SGS, BV, TUV, or Lloyds. For European projects, confirm EN 1092-1 and Werkstoff Nr. 1.4845 documentation is available. All flanges should be supplied in the solution-annealed condition with heat treatment records included in the documentation package.
Procurement Tips for Bulk Orders
Streamline documentation and lower costs on this high-alloy grade by grouping flange types, sizes, and pressure classes under one ASTM A182 F310 specialist supplier. In long-term initiatives, vendor-qualified sources remove duplicate quality audits. If you are a first-time buyer, compare the MTCs of two or three suppliers to have a reliable price baseline and check key chemical characteristics.
Stainless Steel 310 Flanges are pipe connection components manufactured from UNS S31000, a high-chromium, high-nickel austenitic stainless steel containing chromium (24–26%) and nickel (19–22%). This composition gives SS 310 Flanges exceptional oxidation resistance at temperatures up to 1150°C in continuous service and 1040°C in intermittent service, making them the standard specification for high-temperature process piping, furnace systems, and heat treatment equipment where standard austenitic grades cannot operate reliably.
Stainless Steel 310 Flanges are available across all standard face types, pressure classes, and flange forms to ASTM A182 F310. They are chosen specifically for their ability to resist scaling, carburisation, and thermal fatigue in sustained elevated-temperature service. High alloy composition makes them far more resistant to oxidation and sulphidation than 304 or 316. Commonly used with high-temperature pipe and fittings in furnaces, kilns, and petrochemical process systems.
Price of Stainless Steel 310 Flanges
The pricing for Grade 310 flanges is influenced by daily raw material market fluctuations, specific pressure ratings, and the precision required for high-temperature industrial applications.
Price Per Unit / Kg
Stainless Steel 310 Flanges are priced between ₹950 and ₹2,600 per kg in the Indian market. International pricing tracks LME nickel rates closely. 310 contains 19–22% nickel, making it sensitive to nickel commodity movements. Stainless Steel 310 Flanges price also reflects the lower machinability of the high-alloy composition versus standard grades.
Factors Affecting Price
The main raw material cost drivers are high chrome (24-26%) and nickel (19-22%) content. Final unit pricing is dependent upon pressure class, size, face type, and ASTM A182 F310 certification. Verified SS 310 flanges suppliers with complete MTC traceability price at a premium over uncertified goods.
Types of Stainless Steel 310 Flanges
Discover our complete collection of Grade 310 high-temperature components designed for structural integrity in harsh thermal processing settings.
- Stainless Steel 310 Weld Neck Flanges (WN)
- Stainless Steel 310 Slip-On Flanges (SO)
- Stainless Steel 310 Blind Flanges (BL)
- Stainless Steel 310 Socket Weld Flanges (SW)
- Stainless Steel 310 Threaded Flanges (TH)
- Stainless Steel 310 Lap Joint Flanges (LJ)
- Stainless Steel 310 Long Weld Neck Flanges (LWN)
- Stainless Steel 310 Orifice Flanges
- Stainless Steel 310 Reducing Flanges
- Stainless Steel 310 Spectacle Blind Flanges
- Stainless Steel 310 Ring Type Joint (RTJ) Flanges
Specifications of Stainless Steel 310 Flanges
The specifications of Stainless Steel 310 Flanges, including size, standard, and pressure class, are listed in the table below.
|
Parameter |
Verified Details |
|
Manufacturing Standards |
ASTM A182 (Forged), ASTM A240 (Plate) |
|
Standard Size Range |
1/8" NB to 48" NB (Standard stock); Up to 60" NB or custom sizes available via fabrication |
|
Common Flange Types |
Weld Neck, Slip-On, Blind, Socket Weld, Threaded/Screwed, Lap Joint, Orifice, Spectacle Blind |
|
Production Technique |
Forged, Hot Rolled, Precision Machined, Heat Treated |
|
Surface Finish |
Smooth Finish, Serrated Finish (Concentric/Spiral), Cold Drawn |
Chemical Properties of Stainless Steel 310 Flanges
The chemical composition of Stainless Steel 310 Flanges, including its proportions, is listed in the table below.
|
Grade |
C |
Mn |
Si |
P |
S |
Cr |
Ni |
N |
|
310 Min |
— |
— |
— |
— |
— |
24.0 |
19.0 |
— |
|
310 Max |
0.25 |
2.0 |
1.50 |
0.045 |
0.030 |
26.0 |
22.0 |
— |
Mechanical Properties of Stainless Steel 310 Flanges
Below is a table showing the tensile strength and yield strength as well as the elongation of Stainless Steel 310 Flanges.
|
Property |
Value |
|
Tensile Strength |
515 MPa min |
|
Yield Strength (0.2% Offset) |
205 MPa min |
|
Elongation (% in 50 mm) |
40% min |
|
Hardness (Brinell) |
217 HB max |
Physical Properties of Stainless Steel 310 Flanges
The physical properties of Stainless Steel 310 Flanges are listed in the table below, along with density and thermal conductivity.
|
Grade |
Density (kg/m³) |
Elastic Modulus (GPa) |
Mean Co-eff of Thermal Expansion (µm/m/°C) 0–100°C |
Thermal Conductivity (W/m.K) at 100°C |
Specific Heat (J/kg.K) |
Elec Resistivity (nΩ.m) |
|
310 |
7900 |
200 |
15.9 |
14.2 |
500 |
780 |
Dimension Chart of Stainless Steel 310 Flanges
Review the metric dimensions for Class 150 flanges to ensure accurate fitting and installation within your piping network.
|
NB Size |
OD of Flange (mm) |
Bolt Circle Dia (mm) |
No. of Bolts |
Bolt Size |
Flange Thickness (mm) |
|
1/2" |
88.9 |
60.3 |
4 |
M14 |
9.5 |
|
1" |
108.0 |
79.4 |
4 |
M14 |
11.2 |
|
2" |
152.4 |
120.7 |
4 |
M18 |
17.5 |
|
3" |
190.5 |
152.4 |
4 |
M18 |
22.3 |
|
4" |
228.6 |
190.5 |
8 |
M18 |
22.3 |
|
6" |
279.4 |
241.3 |
8 |
M20 |
23.9 |
|
8" |
342.9 |
298.5 |
8 |
M20 |
27.0 |
|
10" |
406.4 |
362.0 |
12 |
M24 |
28.6 |
|
12" |
482.6 |
431.8 |
12 |
Dimensions per ASME B16.5 Class 150. Confirm dimensions for other pressure classes with your supplier.
Size Chart of Stainless Steel 310 Flanges
Use the Class 150 pipe flange size table below for correct alignment and fastening of your piping system.
|
Nominal Pipe Size (NPS) |
Flange Diameter (Inches) |
Number of Bolts |
Bolt Diameter (Inches) |
Bolt Hole Diameter (Inches) |
Bolt Circle (Inches) |
|
1/4" |
3.375 |
4 |
1/2" |
0.62 |
2.25 |
|
1/2" |
3.50 |
4 |
1/2" |
0.62 |
2.375 |
|
3/4" |
3.875 |
4 |
1/2" |
0.62 |
2.75 |
|
1" |
4.25 |
4 |
1/2" |
0.62 |
3.125 |
|
1-1/4" |
4.625 |
4 |
1/2" |
0.62 |
3.50 |
|
1-1/2" |
5.00 |
4 |
1/2" |
0.62 |
3.875 |
|
2" |
6.00 |
4 |
5/8" |
0.75 |
4.75 |
|
2-1/2" |
7.00 |
4 |
5/8" |
0.75 |
5.50 |
|
3" |
7.50 |
4 |
5/8" |
0.75 |
6.00 |
|
3-1/2" |
8.50 |
8 |
5/8" |
0.75 |
7.00 |
|
4" |
9.00 |
8 |
5/8" |
0.75 |
7.50 |
|
5" |
10.00 |
8 |
3/4" |
0.88 |
8.50 |
|
6" |
11.00 |
8 |
3/4" |
0.88 |
9.50 |
|
8" |
13.50 |
8 |
3/4" |
0.88 |
11.75 |
|
10" |
16.00 |
12 |
7/8" |
1.00 |
14.25 |
|
12" |
19.00 |
12 |
7/8" |
1.00 |
17.00 |
|
14" |
21.00 |
12 |
1" |
1.12 |
18.75 |
|
16" |
23.50 |
16 |
1" |
1.12 |
21.25 |
|
18" |
25.00 |
16 |
1-1/8" |
1.25 |
22.75 |
|
20" |
27.50 |
20 |
1-1/8" |
1.25 |
25.00 |
|
24" |
32.00 |
20 |
1-1/4" |
Pressure Rating Chart of Stainless Steel 310 Flanges
Review the pressure-temperature limits for Grade 310 flanges to ensure safe operation across various thermal ranges.
|
Pressure Class |
–29 to 38°C |
100°C |
200°C |
300°C |
|
Class 150 |
20.0 |
17.7 |
15.8 |
14.0 |
|
Class 300 |
51.7 |
46.2 |
41.2 |
36.6 |
|
Class 600 |
103.4 |
92.4 |
82.5 |
73.3 |
|
Class 900 |
155.1 |
138.6 |
123.7 |
109.9 |
|
Class 1500 |
258.6 |
230.9 |
206.2 |
183.2 |
|
Class 2500 |
430.9 |
384.9 |
343.7 |
Pressure ratings per ASME B16.5 for Group 2.2 (SS 310). Always verify with the relevant ASME B16.5 table for your exact service temperature.
Key Features of Stainless Steel 310 Flanges
Review the following points to get the details of the key features for the Stainless Steel 310 Flanges that make it an ideal choice for many industries.
- Oxidation Resistance
- Carburisation Resistance
- Thermal Stability
- Fatigue Resistance
- Weld Compatibility
- Standard Facings
- Non-Magnetic
- Code Compliance
Applications of Stainless Steel 310 Flanges
Explore the demanding industrial sectors and high-temperature process lines where these components are utilised.
- Industrial Furnaces
- Petrochemical Reformers
- Incinerator Systems
- Power Generation
- Chemical Processing
- Cement Plants
- Heat Exchangers
- Boiler Systems
- Aerospace Facilities
How to Choose the Right Stainless Steel 310 Flanges Supplier?
Before placing an order for the material for your project, it's always better to prepare an accurate plan, and the following pointers will help you to manage your procurement.
Supplier Selection Criteria
Verify the supplier provides mill test certificates with full heat and lot traceability confirming UNS S31000 composition. SS 310 and 310S are closely related but have different carbon limits. Confirm which grade your specification requires and check the MTC accordingly. Always request EN 10204 3.1 as a minimum; EN 10204 3.2 is required for pressure equipment and ASME-coded systems.
Technical Considerations
Confirm flange standard and pressure class before ordering. ASME B16.5 covers up to 24" NB; ASME B16.47 covers 26" and above. When used in high-temperature service, ensure the flange material grade is compatible with the pipe and fitting grade so that the junction does not suffer from galvanic or thermal mismatch. For ASME pressure systems, be sure to use material certified to ASTM A182 F310, not converted bar or plate stock.
Quality & Certification Check
Prioritise Stainless Steel 310 flange suppliers with ISO 9001:2015 certification and third-party inspection capability from SGS, BV, TUV, or Lloyds. For European projects, confirm EN 1092-1 and Werkstoff Nr. 1.4845 documentation is available. All flanges should be supplied in the solution-annealed condition with heat treatment records included in the documentation package.
Procurement Tips for Bulk Orders
Streamline documentation and lower costs on this high-alloy grade by grouping flange types, sizes, and pressure classes under one ASTM A182 F310 specialist supplier. In long-term initiatives, vendor-qualified sources remove duplicate quality audits. If you are a first-time buyer, compare the MTCs of two or three suppliers to have a reliable price baseline and check key chemical characteristics.
Stainless Steel 310 Flanges Suppliers
Stainless Steel 310 Flanges FAQ's
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