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Published: November 10, 2025 | Updated: November 10, 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 austenitic grade whose chemical compatibility is pivotal for applications in aggressive environments like acids, alkalis, and chlorides.
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 assessing chemical compatibility for 316Ti under ASME SA240/SA240M for a chemical reactor or marine piping where exposure to corrosives is critical, understanding its ratings is essential. This article explores 316Ti's chemical compatibility data, test results, and insights, based on ASTM A240/A240M and ASME SA240/SA240M standards and our mill tests.
From our production lines, we've documented 316Ti's compatibility: In a 2024 U.S. chemical plant, our 316Ti components under ASTM A240 /A240M showed excellent ratings in acetic acid exposure at 100°C, with <0.1 mm/year loss, outperforming non-stabilized grades by 30%, as per client immersion tests. Compliant with ASME SA240/SA240M for pressure apps, 316Ti's density of 8.00 g/cm³ supports stable performance. Let's delve into the compatibility, from composition to chart data, to equip you for informed decisions.
316Ti stainless steel, compliant with ASTM A240/A240M and ASME SA240/SA240M, exhibits excellent chemical compatibility with ratings A (Excellent) for acetic acid, nitric acid, and ammonia, B (Good) for sulfuric acid dilute, and C (Fair) for hydrochloric acid, thanks to Ti stabilization preventing IGC and Mo boosting pitting (PREN 23-28). Density 8.00 g/cm³, tensile 515 MPa min. Superior to 304 in acids, similar to 316L but better in heat. Download the PDF chart below; Gangsteel stocks 1-200mm with certs for custom needs.
The chemical composition of 316Ti, as per ASTM A240/A240M and ASME SA240/SA240M, is designed for broad compatibility, with titanium ensuring stability in corrosives.
|
Element |
% Range or Max |
Role in Chemical Compatibility |
|---|---|---|
|
Carbon (C) |
0.08 max |
Low C with Ti for acid resistance. |
|
Manganese (Mn) |
2.00 max |
Minor role; aids in alkaline. |
|
Silicon (Si) |
0.75 max |
Improves oxidizing acid compatibility. |
|
Phosphorus (P) |
0.045 max |
Limited for phosphate resistance. |
|
Sulfur (S) |
0.030 max |
Controlled for sulfide avoidance. |
|
Chromium (Cr) |
16.00-18.00 |
Passivation for general chemicals. |
|
Molybdenum (Mo) |
2.00-3.00 |
Enhances chloride/acid compatibility. |
|
Nickel (Ni) |
10.00-14.00 |
Boosts reducing acid resistance. |
|
Titanium (Ti) |
5x(C+N) min, 0.70 max |
Stabilizes for high-temp chemical exposure. |
|
Nitrogen (N) |
0.10 max |
Improves pitting in salts. |
|
Iron (Fe) |
Balance |
Base for overall compatibility. |
This composition under ASTM A240/A240M yields PREN 23-28 for versatile resistance.
Gangsteel's 316Ti meets ASME SA240/SA240M for certified use.
For uns stainless steel plates, 316Ti compatibility verified.
316Ti's mechanical properties, per ASTM A240/A240M and ASME SA240/SA240M, ensure durability in chemical exposure.
|
Property |
Minimum Value |
Typical Range |
Notes on Compatibility |
|---|---|---|---|
|
Tensile Strength (MPa) |
515 |
550-700 |
High for chemical stress. |
|
Yield Strength (MPa) |
205 |
220-300 |
Good for deformation in corrosives. |
|
Elongation (%) |
40 |
45-55 |
Ductility for chemical forming. |
|
Hardness (HRB max) |
95 |
80-90 |
Low for resistance to cracking. |
Properties enhance chemical resistance by preventing stress failures.
For SA240 Type 316Ti, mechanicals robust.
Physical properties of 316Ti, compliant with ASTM A240/A240M and ASME SA240/SA240M, support its chemical compatibility.
|
Property |
Value |
Notes on Compatibility |
|---|---|---|
|
Density (g/cm³) |
8.00 |
For immersion calcs. |
|
Melting Range (°C) |
1370-1400 |
High for hot chemical resistance. |
|
Thermal Conductivity (W/m·K) |
14.6 (at 100°C) |
Aids film maintenance in heat. |
|
Specific Heat (J/kg·K) |
500 |
Efficient in chemical cycling. |
|
Thermal Expansion (10^-6 /°C) |
16.5 (20-100°C) |
Low stress in heated chemicals. |
|
Modulus (GPa) |
193 |
Stiffness in corrosive loads. |
|
Electrical Resistivity (μΩ·cm) |
74 |
Moderate for non-reactive. |
These bolster 316Ti's ratings.
316Ti's chemical resistance, per ASTM A240/A240M and ASME SA240/SA240M, is excellent for many corrosives, with ratings from standard charts (A=Excellent, B=Good, C=Fair, D=Poor).
|
Chemical |
Rating |
Temp (°C) |
Notes |
|---|---|---|---|
|
Acetic Acid (10%) |
A |
RT-100 |
Excellent; no attack. |
|
Acetic Acid (80%) |
B |
RT-80 |
Minor effect. |
|
Acetic Acid, Glacial |
A |
Boiling |
Stable. |
|
Acetone |
A |
RT |
No effect. |
|
Aluminum Chloride (20%) |
C |
RT |
Moderate in dilute. |
|
Ammonia (10%) |
A |
Boiling |
Excellent. |
|
Ammonium Hydroxide |
A |
Boiling |
No attack. |
|
Benzene |
B |
RT |
Minor. |
|
Chromic Acid (5%) |
A |
RT |
Excellent oxidizer. |
|
Citric Acid |
A |
Boiling |
Food-grade safe. |
|
Hydrochloric Acid (20%) |
D |
RT |
Avoid. |
|
Nitric Acid (20%) |
A |
Boiling |
Strong resistance. |
|
Phosphoric Acid (>40%) |
C |
RT |
Concentration-dependent. |
|
Sodium Hydroxide (20%) |
B |
50 |
Minor effect. |
|
Sulfuric Acid (10-75%) |
D |
RT |
Avoid concentrated. |
Ratings from ASTM A240/A240M-aligned charts; 316Ti similar to 316 but Ti-enhanced for heat. Download full PDF from our site.
316Ti is highly weldable per ASTM A240/A240M, with Ti preventing sensitization in chemical exposure. Fillers ER316L.
Gangsteel's 316Ti SA240 Type 316Ti maintains ratings post-weld.
316Ti's compatibility suits chemical reactors (acid A), marine piping (chloride B).
In Gangsteel's supply to U.S. pharma, 316Ti compatibility in vinegar (A) endured.
Equivalents: EN 1.4571 (similar ratings). For A240 GR 316Ti, compatibility matches.
Gangsteel offers 316Ti at $3,200-3,800/ton FOB. 1-200mm thick, certs. Contact for compatibility chart PDF.
Q: What is the chemical compatibility rating for 316Ti in acetic acid?
A: 316Ti has an A (Excellent) rating for acetic acid up to 100°C, showing no significant attack or discoloration, with corrosion rates <0.1 mm/year in dilute solutions, making it ideal for food and chemical processing equipment.
Q: How resistant is 316Ti to hydrochloric acid?
A: 316Ti has a D (Poor) rating for hydrochloric acid, especially in concentrations >10% or at elevated temperatures, where pitting and general corrosion can exceed 1 mm/year; it's not recommended for continuous HCl exposure and requires alternatives like Hastelloy.
Q: What is 316Ti's rating in sulfuric acid?
A: 316Ti rates B (Good) for dilute sulfuric acid (up to 10%) at room temperature with rates <0.1 mm/year, but D (Poor) for concentrated (>75%) sulfuric acid, where severe pitting occurs; suitable for short-term dilute exposure.
Q: Is 316Ti resistant to nitric acid?
A: 316Ti has an A (Excellent) rating for nitric acid up to 20% concentration and boiling temperatures, with corrosion rates <0.05 mm/year, thanks to its chromium content forming a stable passive film in oxidizing acids.
Q: What is the chemical compatibility of 316Ti in sodium hydroxide?
A: 316Ti rates B (Good) for sodium hydroxide up to 20% at 50°C, with minor pitting possible in higher concentrations or temperatures above 100°C; rates remain <0.2 mm/year in dilute alkaline solutions.
Q: How does 316Ti perform in chlorine water?
A: 316Ti has a C (Fair) rating in chlorine water or hypochlorite solutions, with pitting rates 0.2-0.5 mm/year in 100 ppm free chlorine at RT; molybdenum helps, but avoid prolonged exposure to concentrations >500 ppm.
Q: Where can I download the 316Ti chemical compatibility chart PDF?
A: Gangsteel provides a downloadable PDF chemical compatibility chart for 316Ti upon request with quotes; it includes ratings for 200+ chemicals based on ASTM A240/A240M data, with sources like NACE and lab tests for accuracy.
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