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Published: November 10, 2025 | Updated: November 10, 2025By Gangsteel Engineering Team – 25+ Years in Stainless Steel Export Excellence
In the rigorous domain of stainless steels compliant with ASTM A240/A240M and ASME SA240/SA240M standards, 316Ti emerges as a titanium-stabilized austenitic grade whose compliance with ASME SA240 makes it a reliable choice for pressure vessels and high-temperature applications.
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 verifying ASME SA240 compliance for 316Ti under ASME SA240/SA240M for a welded reactor or heat exchanger where certification is key, understanding its specifications and properties is essential. This article explores 316Ti's ASME SA240 compliance, properties, and insights, based on ASTM A240/A240M and ASME SA240/SA240M standards and our mill data.
From our production lines, we've seen 316Ti's compliance in action: In a 2024 U.S. pressure vessel project, our 316Ti plates under ASTM A240 /A240M met ASME SA240 requirements for IGC resistance at 600°C, enabling full certification without revisions, as per client audits. Compliant with ASME SA240/SA240M for pressure apps, 316Ti's density of 8.00 g/cm³ supports compliant designs. Let's delve into the specifications, from composition to testing, to confirm its ASME SA240 compliance.
316Ti stainless steel (UNS S31635) is fully compliant with ASME SA240/SA240M (adopting ASTM A240/A240M), with chemical composition C 0.08% max, Cr 16-18%, Mo 2-3%, Ni 10-14%, Ti 0.70% max; mechanicals tensile 515 MPa min, yield 205 MPa min, elongation 40% min; physical density 8.00 g/cm³, PREN 23-28. Titanium stabilization ensures IGC resistance at 425-815°C, making it ASME SA240-approved for pressure vessels. Tolerances: thickness ±0.13mm for 3-5mm. Equivalent to EN 1.4571; superior to 316L in heat. Ideal for chemical reactors; Gangsteel stocks 1-200mm with SA240 certs.
The chemical composition of 316Ti, as detailed in ASME SA240/SA240M (per ASTM A240/A240M), is tightly controlled for stabilization, with titanium ensuring compliance for high-temp resistance.
|
Element |
% Range or Max |
Role in SA240 Compliance |
|---|---|---|
|
Carbon (C) |
0.08 max |
Max limit to minimize carbides; Ti binds for SA240 IGC tests. |
|
Manganese (Mn) |
2.00 max |
Max for deoxidation; no min in SA240 specs. |
|
Silicon (Si) |
0.75 max |
Max for oxidation; aids SA240 compliance. |
|
Phosphorus (P) |
0.045 max |
Strict max for ductility in specs. |
|
Sulfur (S) |
0.030 max |
Max to avoid hot shortness. |
|
Chromium (Cr) |
16.00-18.00 |
Range for passivation per SA240. |
|
Molybdenum (Mo) |
2.00-3.00 |
Range for pitting; key SA240 feature. |
|
Nickel (Ni) |
10.00-14.00 |
Range for austenite stability. |
|
Titanium (Ti) |
5x(C+N) min, 0.70 max |
Min/max for stabilization; SA240 hallmark. |
|
Nitrogen (N) |
0.10 max |
Max for strength control. |
|
Iron (Fe) |
Balance |
Base; implied in SA240. |
SA240 specifications require heat analysis certs; Gangsteel's exceed with low P/S.
For uns stainless steel plates, SA240 316Ti compliance is verified.
316Ti's mechanical properties, per ASME SA240/SA240M (adopting ASTM A240/A240M), are tested for compliance.
|
Property |
Minimum Value |
Test Method |
SA240 Notes |
|---|---|---|---|
|
Tensile Strength (MPa) |
515 |
ASTM E8 |
For all thicknesses. |
|
Yield Strength (MPa) |
205 |
ASTM E8 |
0.2% offset. |
|
Elongation (%) |
40 |
ASTM E8 |
In 50mm gauge. |
|
Reduction of Area (%) |
Not specified |
- |
Optional in specs. |
|
Hardness (HRB max) |
95 |
ASTM E18 |
Annealed condition. |
|
Brinell (HB max) |
217 |
ASTM E10 |
Converted from HRB. |
|
Impact (Charpy J) |
Not req. |
ASTM A370 |
Optional for low-temp. |
SA240 specs tension tests per plate; Gangsteel's meet with data.
For SA240 Type 316Ti, specifications detailed.
Physical properties of SA240 316Ti, compliant with ASTM A240/A240M and ASME SA240/SA240M, aid design calcs.
|
Property |
Value |
SA240 Specs Notes |
|---|---|---|
|
Density (g/cm³) |
8.00 |
For weight under SA240. |
|
Melting Range (°C) |
1370-1400 |
High-temp limit guide. |
|
Thermal Conductivity (W/m·K) |
14.6 (at 100°C) |
For heat apps specs. |
|
Specific Heat (J/kg·K) |
500 |
Energy calcs. |
|
Thermal Expansion (10^-6 /°C) |
16.5 (20-100°C) |
Distortion control. |
|
Modulus (GPa) |
193 |
Stiffness per specs. |
|
Electrical Resistivity (μΩ·cm) |
74 |
Non-conductive uses. |
SA240 specs imply these for design.
SA240 316Ti's corrosion resistance, per ASTM A240/A240M and ASME SA240/SA240M, is enhanced by Ti for IGC.
SA240 specs optional corrosion tests like A262.
SA240 316Ti is highly weldable per ASTM A240/A240M, with Ti preventing sensitization. Fillers ER316L.
Gangsteel's SA240 316Ti SA240 Type 316Ti fab without issues.
SA240 316Ti specs suit chemical reactors (IGC resistance), marine piping (pitting), per SA240.
In Gangsteel's supply to U.S. offshore, SA240 316Ti performed without failure.
Equivalents: EN 1.4571 (identical specs). For A240 GR 316Ti, SA240 matches.
Gangsteel stocks SA240 316Ti at $3,200-3,800/ton FOB. 1-200mm thick, full specs sheets. Contact for PDF.
Q: What are the chemical composition specs for SA240 Type 316Ti?
A: SA240 Type 316Ti specifies 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, with heat analysis required for certification.
Q: What mechanical properties are required in SA240 for Type 316Ti?
A: SA240 requires tensile 515 MPa min, yield 205 MPa min, elongation 40% min in 50mm, hardness 95 HRB max, with tension tests per plate for compliance.
Q: What are the tolerances for SA240 Type 316Ti plates?
A: SA240 tolerances for thickness ±0.13mm (3-5mm hot-rolled), width ±10mm, length ±15mm, flatness 3mm/m max, with camber and edge specs for quality.
Q: What testing is required in SA240 for Type 316Ti?
A: SA240 requires tension testing (E8), optional hardness (E18), corrosion (A262 for IGC), and hydrostatic for pressure, with certs like MTC 3.1.
Q: What is the maximum temperature rating in SA240 for Type 316Ti?
A: SA240 doesn't specify max temp, but 316Ti rated to 815°C continuous with Ti preventing IGC.
Q: How does SA240 differ from ASTM A240 for Type 316Ti?
A: SA240 is the ASME code version of A240, identical specs but mandatory for BPVC compliance with additional cert requirements.
Q: What is the density of SA240 Type 316Ti?
A: Density is 8.00 g/cm³, implied in SA240 for design calcs.
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