Product List
Gangsteel Material Solution
Email: admin@gangsteel.com
Sales: jack@gangsteel.com
Published: November 11, 2025 | Updated: November 11, 2025By Gangsteel Engineering Team – 25+ Years in Stainless Steel Export Excellence
In the standardized domain of stainless steels compliant with ASTM A240/A240M and ASME SA240/SA240M standards, 316Ti refers to a specific titanium-stabilized variant of the 316 austenitic stainless steel family, where "Ti" denotes the intentional addition of titanium for enhanced high-temperature performance and resistance to intergranular corrosion (IGC).
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, pharmaceutical, and marine.
If you're seeking the meaning and definition of 316Ti under ASME SA240/SA240M for material selection in a welded reactor or heat exchanger, understanding its nomenclature, composition, and purpose is essential. This article provides a clear explanation of 316Ti meaning & definition, its origin, properties, and practical insights, based on ASTM A240/A240M and ASME SA240/SA240M standards and our mill data.
From our production lines, we've seen 316Ti's definition in action: In a 2024 European chemical facility, our 316Ti plates under ASTM A240 /A240M—defined as UNS S31635 with Ti stabilization—resisted IGC at 600°C post-weld, enabling full compliance as per client audits. Compliant with ASME SA240/SA240M for pressure apps, 316Ti's density of 8.00 g/cm³ supports its defined use. Let's break down the meaning and definition of 316Ti, from nomenclature to performance, to guide your understanding.
316Ti Meaning & Definition: 316Ti is a titanium-stabilized version of 316 stainless steel (UNS S31635), where "316" indicates the base alloy with ~16-18% Cr, 10-14% Ni, and 2-3% Mo, and "Ti" signifies titanium addition (min 5x(C+N), max 0.70%) to prevent sensitization and intergranular corrosion at 425–815°C. Defined under ASTM A240/A240M and ASME SA240/SA240M as a high-temperature austenitic grade with tensile 515 MPa min, yield 205 MPa min, elongation 40% min, and PREN 23-28. Density 8.00 g/cm³. Equivalent to EN 1.4571; superior to 316L in heat. Ideal for welded high-temp apps; Gangsteel stocks 1-200mm with certs.
The designation 316Ti follows the AISI (American Iron and Steel Institute) naming convention for stainless steels:
|
Part |
Meaning |
Details |
|---|---|---|
|
3 |
Series |
Part of the 300-series austenitic stainless steels (Cr-Ni alloys). |
|
16 |
Chromium Level |
Approximately 16% chromium (actual 16.00–18.00%). |
|
Ti |
Titanium |
Added for stabilization (5x(C+N) min, 0.70% max) to bind carbon and prevent carbide precipitation. |
Definition: 316Ti is defined as a molybdenum-bearing, titanium-stabilized austenitic stainless steel designed for improved resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range (425–815°C), while retaining the corrosion resistance and mechanical properties of standard 316.
The chemical composition, as defined in ASTM A240/A240M and ASME SA240/SA240M, forms the basis of 316Ti's identity.
|
Element |
% Range or Max |
Role in 316Ti Definition |
|---|---|---|
|
Carbon (C) |
0.08 max |
Higher than 316L but Ti binds it. |
|
Chromium (Cr) |
16.00–18.00 |
Passivation (from "16" in 316). |
|
Nickel (Ni) |
10.00–14.00 |
Austenite stability. |
|
Molybdenum (Mo) |
2.00–3.00 |
Pitting resistance (from 316 base). |
|
Titanium (Ti) |
5x(C+N) min, 0.70 max |
Ti= stabilization against IGC. |
|
Manganese (Mn) |
2.00 max |
Deoxidizer. |
|
Silicon (Si) |
0.75 max |
Oxidation aid. |
|
Phosphorus (P) |
0.045 max |
Controlled impurity. |
|
Sulfur (S) |
0.030 max |
Controlled impurity. |
|
Nitrogen (N) |
0.10 max |
Strength; included in Ti ratio. |
|
Iron (Fe) |
Balance |
Base matrix. |
Ti is the defining element—without it, the grade is 316 or 316L.
316Ti's mechanical properties, per ASTM A240/A240M and ASME SA240/SA240M, define its structural use.
|
Property |
Minimum Value |
Typical Range |
Definition Notes |
|---|---|---|---|
|
Tensile Strength (MPa) |
515 |
550–700 |
High for austenitic. |
|
Yield Strength (MPa) |
205 |
220–300 |
Good load-bearing. |
|
Elongation (%) |
40 |
45–55 |
Excellent ductility. |
|
Hardness (HRB max) |
95 |
80–90 |
Soft for forming. |
Defined for annealed condition; stable at high temp due to Ti.
Physical properties reinforce 316Ti's defined role.
|
Property |
Value |
Notes |
|---|---|---|
|
Density (g/cm³) |
8.00 |
Standard austenitic. |
|
Melting Range (°C) |
1370–1400 |
High for thermal apps. |
|
Thermal Conductivity (W/m·K) |
14.6 (100°C) |
Moderate. |
|
Specific Heat (J/kg·K) |
500 |
Efficient. |
|
Thermal Expansion (10^-6 /°C) |
16.5 (20–100°C) |
Controlled. |
316Ti is defined by superior resistance in sensitizing temps.
316Ti is defined as highly weldable without PWHT due to Ti.
Gangsteel's 316Ti SA240 Type 316Ti welds cleanly.
316Ti's definition suits welded high-temp apps: reactors, exhausts, boilers.
In Gangsteel's supply to U.S. pharma, 316Ti definition ensured compliance.
Equivalents: EN 1.4571 (same definition). For A240 GR 316Ti, definition matches.
Gangsteel stocks 316Ti at $3,200–3,800/ton FOB. 1–200mm thick, certs. Contact for definition-compliant stock.
Q: What is the meaning of 316Ti in stainless steel?
A: 316Ti means a titanium-stabilized version of 316 stainless steel, where "316" refers to ~16% Cr, ~10-14% Ni, 2-3% Mo, and "Ti" indicates titanium addition (min 5x(C+N)) to prevent intergranular corrosion at high temperatures.
Q: What is the definition of 316Ti stainless steel?
A: 316Ti is defined as a molybdenum-bearing austenitic stainless steel (UNS S31635) with titanium stabilization for improved resistance to sensitization and intergranular corrosion in the 425–815°C range, per ASTM A240/A240M.
Q: Why is titanium added in 316Ti—meaning of "Ti"?
A: The "Ti" in 316Ti means titanium is added (0.70% max) to bind carbon and nitrogen, preventing chromium carbide formation and maintaining corrosion resistance after welding or heat exposure.
Q: How does 316Ti differ from 316 in definition?
A: 316Ti is defined with titanium stabilization for high-temperature IGC resistance, while 316 lacks Ti and is prone to sensitization above 425°C.
Q: What is the UNS number meaning for 316Ti?
A: UNS S31635 is the official designation meaning a titanium-stabilized 316-grade stainless steel with specific chemistry for elevated-temperature service.
Q: Is 316Ti the same as 1.4571 in meaning?
A: Yes, 1.4571 (X6CrNiMoTi17-12-2) is the EN equivalent with the same meaning: titanium-stabilized 316 for high-temp corrosion resistance.
Q: What does 316Ti stand for in material specs?
A: 316Ti stands for a 300-series austenitic stainless steel with 16% Cr, molybdenum for pitting resistance, and titanium for stabilization against intergranular attack.
ASTM A516 GR 70 equivalent materials is such as ASME SA516 GR 70, EN 10028 P355GH, and BS1501 224-490 A & B, sh
we supply high-quality A516 Gr 70 steel plate for pressure vessel applications and other standards like ASTM A2
EN10028-2 P355GH for High-Strength Low-Alloy Columbium-Vanadium Structural Steel EN10025-2 S355J2 Structural St
We export A240 304L Stainless Coil 2B, NO.1 No.4 surface, the thickness 0.1mm to 3mm, 3mm to 22mm, Mother mill
