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Published: November 12, 2025 | Updated: November 12, 2025By Gangsteel Engineering Team – 25+ Years in Stainless Steel Export Excellence
In the standardized nomenclature of stainless steels compliant with ASTM A240/A240M and ASME SA240/SA240M, 316Ti is a specific grade designation where "316" refers to the base alloy family (18% chromium, 10% nickel, 2-3% molybdenum austenitic stainless steel), and "Ti" stands for titanium-stabilized, indicating the addition of titanium to prevent intergranular corrosion (IGC) during welding and high-temperature exposure.
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 decoding what 316Ti means under ASME SA240/SA240M for material selection in welded reactors or heat exchangers where IGC resistance is critical, understanding its designation is foundational. This article explains the meaning of 316Ti, its composition, properties, and applications, based on ASTM A240/A240M – 316Ti (UNS S31635) and ASME SA240/SA240M – 316Ti standards and our mill data.
From our production lines, we've seen 316Ti meaning in practice: In a 2024 U.S. chemical vessel, our 316Ti plates under ASTM A240 /A240M — where "Ti" meant titanium stabilization — passed A262 Practice E with zero IGC at 650°C, proving the grade's value, as per client tests. Compliant with ASME SA240/SA240M for pressure apps, 316Ti's density of 8.00 g/cm³ supports robust designs. Let's break down what 316Ti means, from designation to performance, to guide your understanding.
316Ti meaning: 316 = base austenitic alloy with 16-18% Cr, 10-14% Ni, 2-3% Mo; Ti = titanium-stabilized (0.70% max, min 5x(C+N)) to prevent IGC at 425-815°C. Under ASTM A240/A240M – 316Ti (UNS S31635) and ASME SA240/SA240M – 316Ti, it offers tensile 515 MPa min, yield 205 MPa min, elongation 40% min, hardness 95 HRB max, and PREN 23-28. Density 8.00 g/cm³. Equivalent to EN 1.4571; superior to 316L in welded high-temp. Ideal for chemical reactors; Gangsteel stocks 1-200mm with certs for custom needs.
The chemical composition of 316Ti, as per ASTM A240/A240M – 316Ti (UNS S31635) and ASME SA240/SA240M – 316Ti, directly reflects its 316Ti meaning — the "316" base with "Ti" stabilization.
|
Element |
% Range or Max |
Role in 316Ti Meaning |
|---|---|---|
|
Carbon (C) |
0.08 max |
Part of "316" base; low to allow Ti binding. |
|
Chromium (Cr) |
16.00-18.00 |
Core of "316" — 18% Cr for corrosion. |
|
Nickel (Ni) |
10.00-14.00 |
Core of "316" — 10% Ni for austenite. |
|
Molybdenum (Mo) |
2.00-3.00 |
Part of "316" — 2-3% Mo for pitting. |
|
Titanium (Ti) |
5x(C+N) min, 0.70 max |
"Ti" in 316Ti— stabilizes against IGC. |
|
Manganese (Mn) |
2.00 max |
Standard deoxidizer. |
|
Silicon (Si) |
0.75 max |
Oxidation aid. |
|
Phosphorus (P) |
0.045 max |
Controlled impurity. |
|
Sulfur (S) |
0.030 max |
Controlled for machinability. |
|
Nitrogen (N) |
0.10 max |
Strength; part of Ti ratio. |
|
Iron (Fe) |
Balance |
Base matrix. |
316Ti meaning breakdown:
Gangsteel's 316Ti meets ASME SA240/SA240M with verified Ti ratio.
For uns stainless steel plates, 316Ti meaning consistent.
316Ti's mechanical properties, per ASTM A240/A240M – 316Ti and ASME SA240/SA240M – 316Ti, reflect its 316Ti meaning — strong, ductile, and stable.
|
Property |
Minimum Value |
Typical Range |
Notes |
|---|---|---|---|
|
Tensile Strength (MPa) |
515 |
550-700 |
High for "316" base. |
|
Yield Strength (MPa) |
205 |
220-300 |
Good load-bearing. |
|
Elongation (%) |
40 |
45-55 |
Ductile for forming. |
|
Hardness (HRB max) |
95 |
80-90 |
Soft for machining. |
|
Brinell (HB max) |
217 |
160-190 |
Wear resistance. |
Tiensures no strength loss at heat.
Physical properties of 316Ti, compliant with ASTM A240/A240M – 316Ti and ASME SA240/SA240M – 316Ti, support its 316Ti meaning in design.
|
Property |
Value |
Notes |
|---|---|---|
|
Density (g/cm³) |
8.00 |
Standard for weight. |
|
Melting Range (°C) |
1370-1400 |
High for thermal apps. |
|
Thermal Conductivity (W/m·K) |
14.6 (100°C) |
Good dissipation. |
|
Specific Heat (J/kg·K) |
500 |
Efficient cycling. |
|
Thermal Expansion (10^-6 /°C) |
16.5 (20-100°C) |
Low distortion. |
These align with 316 family, enhanced by Ti.
316Ti's corrosion resistance, per ASTM A240/A240M – 316Ti and ASME SA240/SA240M – 316Ti, is defined by its 316Ti meaning.
Uniform: <0.1 mm/year in acids. SCC: Good in chlorides. Pitting: CPT ~25°C.
316Ti is highly weldable per ASTM A240/A240M – 316Ti, with Ti eliminating PWHT. Fillers ER316L.
Gangsteel's 316Ti SA240 Type 316Ti welds without IGC.
316Ti's 316Ti meaning suits:
In Gangsteel's supply to U.S. pharma, 316Ti endured without failure.
Equivalents: EN 1.4571, JIS SUS316Ti — same 316Ti meaning.
For A240 GR 316Ti, meaning universal.
Gangsteel stocks 316Ti at $3,200-3,800/ton FOB. 1-200mm thick, certs. Contact for meaning clarification. Email: admin@gangsteel.com
Q: What does 316Ti mean in stainless steel?
A: 316Ti means 316 base alloy (18Cr-10Ni-2Mo) with Ti (titanium) added for stabilization against IGC at high temps.
Q: What is the difference between 316 and 316Ti?
A: 316 has no Ti and risks IGC in heat; 316Ti has Ti (0.70% max) to bind C and prevent carbide formation.
Q: Why is it called 316Ti?
A: 316 is the AISI family; Ti indicates titanium stabilization, per ASTM A240/A240M.
Q: What does the "Ti" stand for in 316Ti?
A: Ti stands for titanium, added at min 5x(C+N) to prevent sensitization.
Q: Is 316Ti the same as 1.4571?
A: Yes, 1.4571 is the EN equivalent of 316Ti — same 316Ti meaning.
Q: What is UNS S31635 in 316Ti?
A: UNS S31635 is the unified number for 316Ti, confirming 316Ti meaning.
Q: Where is 316Ti used based on its meaning?
A: 316Ti is used in welded high-temp apps (reactors, exhausts) where Ti prevents IGC.
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