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Published: November 11, 2025 | Updated: November 11, 2025By Gangsteel Engineering Team – 25+ Years in Stainless Steel Export Excellence
In the demanding arena of stainless steels compliant with ASTM A182 – F316Ti and ASTM A240/A240M – 316Ti (UNS S31635), 316Ti flanges are forged components designed for high-pressure and high-temperature connections in corrosive environments, offering superior intergranular corrosion (IGC) resistance and durability.
As a premier producer and exporter based in China, Gangsteel has supplied thousands of tons of 316Ti stainless steel, meeting ASTM A240/A240M specs for plates and sheets used in flange forging, to industries like offshore, petrochemical, and marine.
If you're sourcing 316Ti flanges under ASME SA240/SA240M for valve assemblies, piping systems, or pressure vessels where leak-proof seals and strength are critical, understanding their specifications and types is essential. This article explores 316Ti flange options, specs, and insights, based on ASTM A182 – F316Ti and ASTM A240/A240M – 316Ti (UNS S31635) standards and our mill data.
From our production lines, we've seen 316Ti flanges in action: In a 2024 UAE gas plant, our 316Ti weld neck flanges under ASTM A182 – F316Ti withstood 10,000 psi H2S exposure at 150°C without pitting, enhancing safety and longevity as per client pressure tests. Compliant with ASME SA240/SA240M for pressure apps, 316Ti's density of 8.00 g/cm³ supports lightweight yet robust designs. Let's delve into the options, from composition to stock, to guide your selection.
316Ti stainless steel flanges, compliant with ASTM A182 – F316Ti and ASTM A240/A240M – 316Ti (UNS S31635), include weld neck, slip-on, blind, socket weld, threaded, and RTJ types in sizes NPS 1/2-48, Class 150-2500, with tensile 515 MPa min and yield 205 MPa min for high-strength connections. Titanium stabilization ensures IGC resistance at 425-815°C, with density 8.00 g/cm³, PREN 23-28. Stock includes forged flanges per A182 F316Ti; priced $5,000-7,500/ton FOB 2025. Equivalent to EN 1.4571; superior to 316L in heat. Ideal for offshore piping; Gangsteel stocks with certs for custom needs.
The chemical composition of 316Ti, as per ASTM A182 – F316Ti and ASTM A240/A240M – 316Ti (UNS S31635), is tailored for flange durability, with titanium ensuring stability in corrosives.
|
Element |
% Range or Max |
Role in Flanges |
|---|---|---|
|
Carbon (C) |
0.08 max |
Low for weldable flange joints. |
|
Manganese (Mn) |
2.00 max |
Aids formability in flange hubs. |
|
Silicon (Si) |
0.75 max |
Improves oxidation for flange faces. |
|
Phosphorus (P) |
0.045 max |
Limited for flange toughness. |
|
Sulfur (S) |
0.030 max |
Controlled for flange machinability. |
|
Chromium (Cr) |
16.00-18.00 |
Enhances corrosion for marine flanges. |
|
Molybdenum (Mo) |
2.00-3.00 |
Boosts pitting in offshore flanges. |
|
Nickel (Ni) |
10.00-14.00 |
Stabilizes for flange ductility. |
|
Titanium (Ti) |
5x(C+N) min, 0.70 max |
Stabilizes for high-temp flange apps. |
|
Nitrogen (N) |
0.10 max |
Strengthens for high-pressure flanges. |
|
Iron (Fe) |
Balance |
Base for robust flange stock. |
This composition under ASTM A182 – F316Ti ensures flange options meet mechanical specs.
Gangsteel's 316Ti meets ASME SA240/SA240M for certified use.
For uns stainless steel plates, flange blank stock available.
316Ti's mechanical properties, per ASTM A240/A240M and ASME SA240/SA240M, support flanges with robust performance.
|
Property |
Minimum Value |
Typical Range |
Notes for Flanges |
|---|---|---|---|
|
Tensile Strength (MPa) |
515 |
550-700 |
High for Class 2500 flanges. |
|
Yield Strength (MPa) |
205 |
220-300 |
Good for NPS 24 pressure. |
|
Elongation (%) |
40 |
45-55 |
Ductility for flange forming. |
|
Hardness (HRB max) |
95 |
80-90 |
Low for flange machining. |
|
Impact (Charpy J) |
Not req. |
100+ at RT |
Tough for flange impact. |
SA240 specs ensure flange strength; Gangsteel's exceed for high-pressure.
For SA240 Type 316Ti, flange options robust.
Physical properties of 316Ti, compliant with ASTM A240/A240M and ASME SA240/SA240M, aid flange designs.
|
Property |
Value |
Notes for Flanges |
|---|---|---|
|
Density (g/cm³) |
8.00 |
Efficient for flange weight. |
|
Melting Range (°C) |
1370-1400 |
High for thermal flange apps. |
|
Thermal Conductivity (W/m·K) |
14.6 (at 100°C) |
Good for heat-dissipating flanges. |
|
Specific Heat (J/kg·K) |
500 |
Efficient for flange cycling. |
|
Thermal Expansion (10^-6 /°C) |
16.5 (20-100°C) |
Low distortion in flange joints. |
|
Modulus (GPa) |
193 |
Stiffness for secure flanges. |
|
Electrical Resistivity (μΩ·cm) |
74 |
Moderate for non-conductive flanges. |
These ensure flange efficiency.
316Ti's corrosion resistance, per ASTM A240/A240M and ASME SA240/SA240M, is ideal for flange apps in corrosives.
316Ti is highly weldable per ASTM A240/A240M, with Ti preventing sensitization in flange joints. Fillers ER316L.
Gangsteel's 316Ti SA240 Type 316Ti excels in flange fab.
316Ti flange options suit offshore platforms (pressure-tight), chemical modules (corrosion).
In Gangsteel's supply to U.S. offshore, 316Ti flanges endured without failure.
Equivalents: EN 1.4571 (similar flange options). For A240 GR 316Ti, options match.
Gangsteel stocks 316Ti flanges (NPS 1/2-48, Class 150-2500) at $5,000-7,500/ton FOB 2025. Custom, certs. Contact for options.
Q: What are the flange options for 316Ti stainless steel?
A: 316Ti flange options include weld neck, slip-on, blind, socket weld, threaded, and RTJ types in NPS 1/2-48, Class 150-2500, compliant with ASTM A182 F316Ti for forged flanges.
Q: What is the chemical composition of 316Ti for flanges?
A: For flanges, C 0.08% max, Cr 16-18%, Mo 2-3%, Ni 10-14%, Ti 0.70% max, Mn 2% max, Si 0.75% max, P 0.045% max, S 0.03% max, N 0.10% max, Fe balance, ensuring high-strength corrosion resistance.
Q: What mechanical properties apply to 316Ti flanges?
A: Minimum tensile 515 MPa, yield 205 MPa, elongation 40%, hardness 95 HRB max for 316Ti flanges, providing robust performance in pressure and torque.
Q: What sizes are available in 316Ti flange stock?
A: 316Ti flange stock available in NPS 1/2-48 (DN 15-1200), Class 150-2500, with bore to match pipe and hub lengths per ANSI B16.5 for standard options.
Q: What is the density of 316Ti for flange stock?
A: Density is 8.00 g/cm³ for 316Ti flange stock, yielding ~50-500 kg per flange depending on size for weight calcs.
Q: What is the hardness of 316Ti flange stock?
A: Maximum hardness 95 HRB or 217 HB for 316Ti flange stock in annealed condition, soft for machining while maintaining strength.
Q: What is the yield strength of 316Ti for flanges?
A: Minimum yield strength 205 MPa for 316Ti flanges, with typical 220-300 MPa, providing excellent deformation resistance for high-pressure connections.
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