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Published: November 8, 2025 | Updated: November 8, 2025By Gangsteel Engineering Team – 25+ Years in Stainless Steel Export Excellence
In the specialized domain of stainless steels compliant with ASTM A240/A240M and ASME SA240/SA240M standards, 316Ti emerges as a titanium-stabilized grade optimized for thermal performance in corrosive and high-temperature settings.
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, to industries like petrochemical, marine, and power generation.
If you're designing a heat exchanger or exhaust system under ASME SA240/SA240M where thermal conductivity and expansion are critical, understanding 316Ti's properties is essential. This guide explores its thermal conductivity, expansion coefficient, and related traits, based on ASTM A240/A240M and ASME SA240/SA240M standards and our mill data.
From our production lines, we've observed 316Ti's thermal prowess: In a 2024 European boiler retrofit, our 316Ti components under ASTM A240 /A240M maintained low expansion at 600°C, reducing stress by 20% compared to non-stabilized grades, as per client simulations. Compliant with ASME SA240/SA240M for pressure apps, 316Ti's density of 8.00 g/cm³ and conductivity of ~14.6 W/m·K support efficient heat transfer. Let's delve into the details, from composition to high-temp behavior, to guide your thermal design.
316Ti stainless steel, compliant with ASTM A240/A240M and ASME SA240/SA240M, offers thermal conductivity of 14.6 W/m·K at 100°C (rising to 16.3 at 500°C) and expansion coefficient of 16.5 × 10^-6 /°C (20-100°C), making it stable for high-temp apps up to 815°C intermittent. Titanium stabilization prevents IGC, enhancing durability in heat-corrosives.
Compared to 316L, it has similar conductivity but better high-temp retention. Density 8.00 g/cm³ aids calculations. Ideal for boilers/exhausts; Gangsteel stocks 1-200mm with certs.
The chemical composition of 316Ti, as specified in ASTM A240/A240M and ASME SA240/SA240M, is tailored for thermal stability, with titanium binding carbides to maintain properties at high temps.
|
Element |
% Range or Max |
Role in Thermal Conductivity & Expansion |
|---|---|---|
|
Carbon (C) |
0.08 max |
Low C minimizes thermal expansion variations; Ti stabilizes for consistent conductivity. |
|
Manganese (Mn) |
2.00 max |
Aids matrix stability without affecting thermal properties. |
|
Silicon (Si) |
0.75 max |
Enhances high-temp oxidation resistance, supporting conductivity in heat. |
|
Phosphorus (P) |
0.045 max |
Limited impurity; no direct thermal impact. |
|
Sulfur (S) |
0.030 max |
Kept low for cleanliness; minor role. |
|
Chromium (Cr) |
16.00-18.00 |
Contributes to thermal conductivity through alloy matrix. |
|
Molybdenum (Mo) |
2.00-3.00 |
Improves high-temp corrosion, indirectly aiding thermal performance in corrosives. |
|
Nickel (Ni) |
10.00-14.00 |
Stabilizes austenite for low thermal expansion. |
|
Titanium (Ti) |
5x(C+N) min, 0.70 max |
Key for high-temp stability; reduces expansion fluctuations from carbides. |
|
Nitrogen (N) |
0.10 max |
Strengthens without altering thermal traits. |
|
Iron (Fe) |
Balance |
Base for overall thermal conductivity. |
This composition ensures 316Ti's thermal conductivity and expansion remain stable, compliant with ASTM A240/A240M.
Gangsteel's 316Ti meets ASME SA240/SA240M for thermal apps.
316Ti's mechanical properties, per ASTM A240/A240M and ASME SA240/SA240M, support its thermal range, with Ti maintaining strength at heat.
|
Property |
Minimum Value |
Typical Range |
Notes on Temp Performance |
|---|---|---|---|
|
Tensile Strength (MPa) |
515 |
550-700 |
Retains >70% at 815°C; stable expansion aids. |
|
Yield Strength (MPa) |
205 |
220-300 |
Good creep in thermal cycling. |
|
Elongation (%) |
40 |
45-55 |
Ductility for thermal stress. |
|
Hardness (HRB max) |
95 |
80-90 |
Low for thermal forming. |
|
Impact (Charpy J) |
Not req. |
100+ at RT |
Maintains at low/high temps. |
Under ASTM A240/A240M, 316Ti excels in 425-815°C without IGC weakening.
316Ti's thermal properties, compliant with ASTM A240/A240M and ASME SA240/SA240M, are optimized for high-temp efficiency.
|
Property |
Value |
Notes |
|---|---|---|
|
Thermal Conductivity (W/m·K) |
14.6 at 100°C; 16.3 at 500°C |
Increases with temp for better heat flow. |
|
Coefficient of Thermal Expansion (10^-6 /°C) |
16.5 (20-100°C); 17.5 (20-500°C) |
Low to minimize distortion in heat. |
|
Density (g/cm³) |
8.00 |
Consistent for thermal mass calcs. |
|
Melting Range (°C) |
1370-1400 |
High for thermal apps. |
|
Specific Heat (J/kg·K) |
500 |
Efficient energy handling. |
|
Modulus (GPa) |
193 |
Stiffness in thermal stress. |
Thermal conductivity supports exchangers, expansion low for joints. Compared to 316L, similar but 316Ti stable in sensitizing range.
For uns stainless steel plates, 316Ti offers thermal advantages.
316Ti's corrosion, per ASTM A240/A240M and ASME SA240/SA240M, remains strong at high temps with Ti preventing IGC.
316Ti welds well, Ti stabilizing in heat zones per ASTM A240/A240M. No preheat; low expansion minimizes warping.
Gangsteel's 316Ti SA240 Type 316Ti excels in thermal fab.
316Ti's thermal properties suit boilers, exhausts, reactors—low expansion for seals, conductivity for transfer.
In Gangsteel's supply to U.S. power, 316Ti handled 700°C without distortion.
316Ti equivalents: EN 1.4571. For A240 GR 316Ti, thermal matches.
Gangsteel stocks 316Ti at $3,200-3,800/ton FOB. 1-200mm thick, ASME SA240 certs. Contact for thermal data.
Q: What is the thermal conductivity of 316Ti stainless steel?
A: Thermal conductivity of 316Ti is 14.6 W/m·K at 100°C, rising to 16.3 W/m·K at 500°C, supporting efficient heat transfer in high-temp apps like exchangers.
Q: What is the thermal expansion coefficient of 316Ti stainless steel?
A: The coefficient is 16.5 × 10^-6 /°C from 20-100°C, increasing to 17.5 × 10^-6 /°C at 20-500°C, low to minimize distortion in thermal cycling.
Q: How does thermal conductivity of 316Ti compare to other grades?
A: Similar to 316L (14.6 W/m·K at 100°C); lower than carbon steel (50 W/m·K) but sufficient for SS apps, with Ti not affecting conductivity.
Q: What temperature range can 316Ti stainless steel handle?
A: 316Ti handles -196 to 815°C intermittent, 425-650°C continuous, with Ti preventing IGC for reliable high-temp use.
Q: How does thermal expansion affect 316Ti in high-temp apps?
A: Low expansion reduces stress in joints during heating, enhancing durability in apps like boilers; better than higher-expansion alloys.
Q: Is 316Ti suitable for high-temperature thermal cycling?
A: Yes, with stable conductivity and low expansion, 316Ti withstands cycling without cracking, ideal for exhausts or reactors.
Q: What standards specify thermal properties for 316Ti?
A: ASTM A240/A240M and ASME SA240/SA240M provide guidelines; Gangsteel's certs include thermal data for verification.
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