Acidur 4571 +AT Bar

Alternative and trade names
Acidur 4571, 1.4571, Type 316Ti, SUS316Ti, X6CrNiMoTi17-12-2


Acidur 4571 is comparable to Acidur 4404 in terms of corrosion resistance and mechanical and technological values, while Acidur 4057 is the material of choice if high strength at high temperatures is required. Due to the low carbon content, Acidur 4571 can also be used without heat treatment after welding.

Related Standards

Equivalent Materials



Density ρ

8 g/cm³ at 20 °C


Diameter d

250 mm



Charpy impact energy, V-notch aK,charpy,V-notch

100 J at 20 °C

Elastic modulus E

200 GPa at 20 °C

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Elongation A5 A5

40 % at 20 °C

Elongation A5, transverse A5,trans

30 % at 20 °C

Hardness, Brinell HB

215 [-] at 20 °C

Hardness, Rockwell C HRC

22 [-] at 20 °C

Tensile strength Rm

500 - 700 MPa at 20 °C

Yield strength Rp0.2 Rp0.2

200 MPa at 20 °C

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Yield strength Rp1.0 Rp1.0

235 MPa at 23 °C

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Coefficient of thermal expansion α

1.65E-5 1/K at 100 °C

for 20°C to the mentioned temperature

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Specific heat capacity cp

500 J/(kg·K) at 20 °C

Thermal conductivity λ

15 W/(m·K) at 20 °C


Electrical resistivity ρel

7.5E-7 Ω·m at 20 °C

Chemical properties


Weight %






16.5 - 18.5 %


10.5 - 13.5 %


2 %


2 - 2.5 %


Technological properties

Application areas

Apparatus and pipeline construction, Construction industry, Chemical industry, Food industry, Mechanical Engineering, Medical and pharmaceutical industry, Shipbuilding

Corrosion properties

Acidur 4571 shows good corrosion resistance in most natural waters with low to medium concentrations of chlorides, salt and hydrochloric acid as well as organic acids. Since Acidur 4571 is resistant to intergranular corrosion even after welding, it meets the following standardized test methods: AFNOR NF 05-159, ASTM A262 Practice E and DIN EN ISO 3651 Part 2. (PREN = 23.1 – 26.7)

General machinability

The addition of titanium leads to the formation of titanium carbonitrides, which increases the tool wear

Heat Treatment

Solution annealing: 1020-1120°C (water, air) fast cooling

Hot forming

It is formable at 900-1200°C

Processing history

Solution Annealed


Acidur 4571 can be welded with and without filler material using all conventional methods. If a filler metal is necessary, use 1.4430. No heat treatment is required after welding. The interpass temperature should not exceed 200°C. Approach colours must be mechanically or chemically be removed.

This material data has been provided by Deutsche Edelstahlwerke Specialty Steel (DEW).

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.