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Acidur 4122

Alternative and trade names
1.4122
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Description

Acidur 4122 is characterised by its combination of outstanding mechanical properties, (after heat treatment) and a corrosion resistance which is comparable with that of 1.4016. This steel can also be polished to high gloss finishes.

Properties

Mechanical

Charpy impact energy aK,charpy

10 J at 20 °C

min

Elongation A5 A5

12 % at 20 °C

min

Tensile strength Rm

750 - 950 MPa at 20 °C

Yield strength Rp0.2 Rp0.2

550 MPa at 20 °C

min

Thermal

Coefficient of thermal expansion α

1.041E-5 1/K at 100 °C

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Chemical properties

Element

Weight %

Comment

Fe

-

balance

Cr

15.5 - 17.5 %

Mn

1.5 %

max

Ni

1 %

max

Si

1 %

max

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Technological properties

Application areas

Automotive industry, Pump shafts, Food and Beverage industry, Mechanical engineering, Cutting Tools, Building industry

Corrosion properties

Good - As a result of its higher chromium content, 17 %, 1.4122 is more corrosion resistant than 1.4006 and other 13 % chromium stainless steels. Good corrosion resistance is displayed in moderately corrosive media/environments with low chloride ion concentrations. Although the addition of molybdenum increases the resistance of this steel to chloride containing environments, it is not suited for use in sea water applications unless it is provided with cathodic protection. Optimal corrosion resistance is attained when the surface is finely ground or polished.

General machinability

With Care - The machinability of this grade of stainless steel is directly related to its hardness and as such the optimal machining parameters vary considerably. Once the hardness is known, the machining parameters can be estimated since 1.4122 machines similar to carbon steels of the same hardness. Although it must be realised that the machining parameters will vary depending on the structure/hardness of the steel.

Processing history

Quenched and tempered QT 750

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.