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Published: November 11, 2025 | Updated: November 11, 2025By Gangsteel Engineering Team – 25+ Years in Stainless Steel Export Excellence
In the precision-driven arena of stainless steels compliant with ASTM A240/A240M – 316Ti (UNS S31635) for base material and AWS A5.9 – ER316L or ER316Ti for fillers, TIG rod welding of 316Ti offers superior joint integrity for high-temperature and corrosive environments, ensuring welds with excellent ductility 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, marine, and power generation.
If you're planning TIG rod welding for 316Ti under ASME SA240/SA240M for a reactor vessel or exhaust piping where weld quality, filler selection, and post-weld performance are essential, understanding the process is vital. This article explores TIG rod welding for 316Ti, data, and insights, based on ASTM A240/A240M – 316Ti (UNS S31635) for base and AWS A5.9 – ER316L or ER316Ti for fillers standards and our mill tests.
From our production lines, we've optimized TIG rod welding for 316Ti: In a 2024 U.S. chemical reactor fabrication, our 316Ti plates welded with ER316Ti rod under ASTM A240 /A240M showed no IGC after 1,000 hours at 150°C, enhancing joint durability as per client tensile tests. Compliant with ASME SA240/SA240M for pressure apps, 316Ti's density of 8.00 g/cm³ supports efficient welding. Let's delve into the guide, from composition to TIG techniques, to equip you for successful welds.
316Ti stainless steel TIG rod welding, compliant with ASTM A240/A240M – 316Ti (UNS S31635) for base and AWS A5.9 – ER316L or ER316Ti for fillers, offers welds with tensile ~515 MPa and IGC resistance at 425-815°C. Recommended parameters: current 80-150A DCEN, gas Ar 10-15 L/min, filler diameter 1.6-2.4mm. Density 8.00 g/cm³, PREN 23-28. Superior to 304 in heat; Gangsteel stocks with certs for custom TIG needs.
The chemical composition of 316Ti, as per ASTM A240/A240M – 316Ti (UNS S31635), is optimized for TIG rod welding compatibility, with titanium ensuring stability in welds.
|
Element |
% Range or Max |
Role in TIG Rod Welding |
|---|---|---|
|
Carbon (C) |
0.08 max |
Low C with Ti for low-C rod compatibility. |
|
Manganese (Mn) |
2.00 max |
Matches rods for deoxidation. |
|
Silicon (Si) |
0.75 max |
Improves rod fluidity. |
|
Phosphorus (P) |
0.045 max |
Limited for rod integrity. |
|
Sulfur (S) |
0.030 max |
Controlled for rod cracking. |
|
Chromium (Cr) |
16.00-18.00 |
Matches rods for passivation. |
|
Molybdenum (Mo) |
2.00-3.00 |
Requires Mo in rods for pitting. |
|
Nickel (Ni) |
10.00-14.00 |
Stabilizes with rod Ni. |
|
Titanium (Ti) |
5x(C+N) min, 0.70 max |
Selection recommends Ti rods for matching stabilization. |
|
Nitrogen (N) |
0.10 max |
Controlled for rod strength. |
|
Iron (Fe) |
Balance |
Base for rod matching. |
This composition under ASTM A240/A240M ensures TIG rod welding compatibility.
Gangsteel's 316Ti meets ASME SA240/SA240M for certified welding.
For uns stainless steel plates, TIG guide aligns.
316Ti's mechanical properties, per ASTM A240/A240M and ASME SA240/SA240M, are preserved with proper TIG rod welding.
|
Property |
Minimum Value |
Welded Typical |
TIG Rod Notes |
|---|---|---|---|
|
Tensile Strength (MPa) |
515 |
550-650 |
Rods like ER316L maintain ~90% base. |
|
Yield Strength (MPa) |
205 |
220-280 |
No drop with Ti rods. |
|
Elongation (%) |
40 |
35-45 |
Good with low-C rods. |
|
Hardness (HRB max) |
95 |
85-95 |
Low with DCEN TIG. |
|
Impact (Charpy J) |
Not req. |
80+ at RT |
Maintained with matching rods. |
TIG rod welding recommends DCEN for property retention.
For SA240 Type 316Ti, TIG data detailed.
Physical properties of 316Ti, compliant with ASTM A240/A240M and ASME SA240/SA240M, aid TIG rod welding selection.
|
Property |
Value |
Notes on TIG Rod Welding |
|---|---|---|
|
Density (g/cm³) |
8.00 |
Consistent for rod calcs. |
|
Melting Range (°C) |
1370-1400 |
High for rod melt pool. |
|
Thermal Conductivity (W/m·K) |
14.6 (at 100°C) |
Good flow with rods. |
|
Specific Heat (J/kg·K) |
500 |
Efficient for interpass. |
|
Thermal Expansion (10^-6 /°C) |
16.5 (20-100°C) |
Low stress with rods. |
|
Modulus (GPa) |
193 |
Stiffness post-weld. |
|
Electrical Resistivity (μΩ·cm) |
74 |
Moderate for TIG arc. |
These ensure rod welding efficiency.
For 316Ti under ASTM A240/A240M and ASME SA240/SA240M, select TIG rods that match chemistry and maintain Ti stabilization.
Recommended TIG rods (per AWS A5.9):
|
TIG Rod |
AWS Classification |
Composition Notes |
Applications |
|---|---|---|---|
|
Solid Rod |
ER316L |
Low C, Mo 2-3%; no Ti |
General TIG; good for P8. |
|
Ti-Stabilized |
ER316Ti |
Low C, Ti 0.5-0.7% |
Matches 316Ti for high-temp IGC. |
|
Low-C Alternative |
ER316LSi |
Low C, high Si for arc stability |
High-deposition TIG; smooth beads. |
Gangsteel's tests show ER316Ti rods yield welds with tensile >500 MPa.
316Ti's corrosion resistance, per ASTM A240/A240M and ASME SA240/SA240M, is preserved with proper TIG rod welding.
316Ti is highly weldable, Ti aiding resistance in TIG welds per ASTM A240/A240M. No preheat; good for rod-sensitive fab.
Gangsteel's 316Ti SA240 Type 316Ti maintains ratings post-TIG.
316Ti's TIG rod welding suits chemical reactors (welded with ER316Ti), marine piping (ER316L for outdoors).
In Gangsteel's supply to U.S. pharma, 316Ti TIG welded without IGC.
Equivalents: EN 1.4571 (similar TIG rod). For A240 GR 316Ti, rods match.
Gangsteel offers 316Ti at $3,200-3,800/ton FOB. 1-200mm thick, certs. Contact for TIG rod selection.
Q: What is the recommended TIG rod for 316Ti stainless steel?
A: Recommended TIG rods for 316Ti include ER316L for general corrosion resistance and ER316Ti for matching titanium stabilization in high-temperature applications, ensuring weld properties align with the base metal's IGC resistance.
Q: How does TIG rod choice affect 316Ti weld properties?
A: Choosing ER316L provides low-carbon welds with good ductility and corrosion resistance, while ER316Ti adds titanium to prevent sensitization and maintain high-temperature IGC resistance, yielding welds with tensile >500 MPa and elongation >35%.
Q: What is the A number for 316Ti TIG rod in ASME?
A: The A number for 316Ti TIG rod is A8, indicating austenitic welds with Cr-Ni-Mo-Ti composition per ASME Section IX, ensuring compatibility for P number 8 base material.
Q: What TIG rod is best for welding 316Ti to 316L?
A: ER316L TIG rod is best for welding 316Ti to 316L, providing low-carbon deposits that match both grades' corrosion resistance without compromising the joint's IGC or pitting performance.
Q: Is preheat required when TIG welding 316Ti with rod?
A: No preheat is required for TIG welding 316Ti with rods like ER316L, as its titanium stabilization prevents sensitization, but interpass temperatures should be limited to 150°C for optimal weld quality.
Q: What is the role of titanium in 316Ti TIG rod selection?
A: Titanium in 316Ti TIG rods like ER316Ti stabilizes the weld against carbide precipitation at high temperatures, preventing intergranular corrosion and maintaining the base metal's IGC resistance in the heat-affected zone.
Q: What standards govern TIG rod for 316Ti stainless steel?
A: TIG rods for 316Ti are governed by AWS A5.9 for classifications like ER316L, aligned with ASTM A240/A240M base specs and ASME Section IX for procedure qualifications.
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