AISI 316Ti | 1.4571 | BS 320S31 | X6CrNiMoTi17-12-2 | Austenitic steel
Data sheet according to DIN EN 10088-3 and ISO 6931-1 for material number 1.4571
AISI 316Ti is a titanium-stabilised austenitic stainless steel, also known as 1.4571, BS 320S18 & BS 320S31 and X6CrNiMoTi17-12-2. The material is characterised by its very good corrosion resistance (PREN value 23.1 to 26.7) in a natural environment with a low chlorine and salt content. The material is also resistant to intergranular corrosion, but not to seawater and salt (pitting corrosion may occur here). Stainless steel AISI 316Ti has a tensile strength of 500 to 700 N/mm², a hardness of ≤ 215 HB and a density of 8.0 kg/dm³ (at 20°C). It can be used at temperatures of up to 550°C and is also suitable for low temperatures. The stainless steel AISI 316Ti / 1.4571 is magnetic (magnetic properties μr ≤ 1.3), but cannot be polished. It has excellent welding properties and can also be used for forging. It can be cold formed and cold-pressed. The material is only partially suitable for machining. Typical areas of application include the food industry, the construction industry and pipeline construction.
Specifications of the material
EN material number 1.4571
EN short name X6CrNiMoTi17-12-2
EN standard 10088-3/ISO 6931-1
Microstructure class Austenite
Comparable standards and designations
AFNOR Z6CNDT17-12
AISI 316 Ti
Alloy 316Ti
BS 320S18 / 320S31
ČSN 17347 / 17348
JIS SUS316Ti
PN H17N13M2T / H18N10MT
SAE 316Ti
SIS / SS 2350
UNE F.3535
UNI X6CrNiMoTi1712
UNS S31635
Properties and chemical composition of stainless steel AISI 316Ti / 1.4571
C | Si | Mn | P | S | N | Cr | Cu | Mo | Ni | Ti |
|---|---|---|---|---|---|---|---|---|---|---|
≤ 0,08 | ≤ 1,00 | ≤ 2,00 | ≤ 0,045 | ≤ 0,03 | - | 16,5 - 18,5 | - | 2,00 - 2,50 | 10,5 - 13,5 | 5xC – 0,70 |
Mass fraction in % according to DIN EN 10088-3
Abbreviations: C = carbon, Cr = chromium, Cu = copper, Mn = manganese, Mo = molybdenum, N = nitrogen, Ni = nickel, P = phosphorus, S = sulphur, Si = silicon, Ti = thallium.
Physical properties
Magnetisability: low
Density (kg/dm³): 8.0
Thermal conductivity (at up to 20°C): 15
Electronic resistance at room temperature (in Ω mm²/m): 0.75
Specific heat capacity at 20°C in J/(kg K): 500
Mechanical properties
The values given refer to the diameter range ≤ 160 (Ø in mm) and 160 < d ≤ 250 (Ø in mm)*
Hardness in HB: ≤ 215
Yield strength Rp0.2 in Mpa: ≥ 200
Yield strength Rp1.0 in Mpa: ≥ 235
Strength / tensile strength Rm in Mpa: 500-700
Elongation at break A in % (longitudinal) at ≤ 160: ≥ 40
* These figures refer to mechanical properties at room temperature in the solution-annealed state (according to EN 10088-3)
Yield strengths at elevated temperature in the solution-annealed condition
Temp in °C | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 550 |
|---|---|---|---|---|---|---|---|---|---|---|
Rp1,0 in Mpa | 215 | 205 | 192 | 183 | 175 | 169 | 164 | 160 | 158 | 157 |
Rp0,2 in MPa | 185 | 175 | 165 | 155 | 145 | 140 | 135 | 131 | 129 | 127 |
Stainless steel AISI 316Ti (1.4571, X6CrNiMoTi17-12-2) has good weldability and can be processed using all common welding methods (except gas welding). A welding filler is not required. If a welding filler is desired, we recommend the material 1.4430. Heat treatment after welding is not required. Welding does not affect the resistance to intergranular corrosion. We recommend using our CEV calculator to assess weldability.
Forging
The stainless steel AISI 316Ti /1.4571 has good forgeability. Initially, the material should be heated to a temperature between 1150°C and 1180°C so that forging can take place in the temperature range of 1180°C and 950°C. Subsequent cooling should take place in water. Open-die forging and drop forging are possible with this material.
Heat treatment and hot forming
Solution heat treatment (cooling by air or water): 1020-1120 °C
Hot forming (cooling by air): 1200-900 °C
Machinability
Due to the titanium content in the alloy, the corrosion-resistant steel AISI 316Ti has only moderate to poor machinability compared to other chromium-nickel-molybdenum steels. During machining, titanium carbonitrides can form, which lead to increased tool wear.
Corrosion resistance
The material AISI 316Ti (1.4571, X6CrNiMoTi17-12-2) has good corrosion resistance (PREN value 23.1 to 26.7) in natural media and those with a low chlorine and salt content. The material is also resistant to organic acids such as formic acid or sulfuric acid in low and medium concentrations. Both in its delivery condition and after welding, the stainless steel 316Ti / BS 320S31 is resistant to intercrystalline corrosion. It is not resistant to seawater and salt. Pitting corrosion can occur in these conditions.
Applications of stainless steel AISI 316Ti / BS 320S31
The austenitic stainless steel AISI 316Ti (1.4571, X6CrNiMoTi17-12-2) is used in a wide range of applications due to its excellent corrosion resistance and high temperature resistance up to 550°C. These include the automotive industry, where stainless steel 316Ti, BS320S31 is used for exhaust system components, tanks or housings, for example. In the construction industry, stainless steel 316Ti is used for architectural elements such as railings or facade cladding. In pressure vessel construction, this stainless steel is used for the construction of pressure vessels and pipelines due to its corrosion resistance. In the petrochemical and chemical industry, stainless steel AISI 316Ti / 1.4571 is used for various applications, including for piping and containers that come into contact with chemicals. Other applications can be found in the food industry and in shipbuilding, apparatus engineering, pipeline construction and mechanical engineering.
Stock of stainless steel wire
The data provided in this data sheet or material information sheet has been compiled to the best of our knowledge and is based on the current version of the relevant standard. We do not accept any liability for any errors.
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