AISI 316 L DIN 1.

4404 - X 2 CrNiMo 17 12 2 AFNOR Z 2 CND 17 12

General characteristics
Austenitic stainless steel with an excellent corrosion resistance. Its general characteristics are comparable to that of Machinability -
the grade 316 L (1.4435), but it differs from the latter in a slightly lower Nickel and Molybdenum content. Quench hardening no
In case of complex machining operations, such as the drilling of long but narrow holes, modified steel types (e.g. Polishing +
316L PM) with the addition of chip breaking additives may be preferred.
Magnetic no
This steel complies with the standard EN 1811 and can be used for products in direct and prolonged contact with
skin. Age hardening no
Welding
MIG,TIG,WIG yes
Arc yes
Resistance yes
Autogenous yes
Laser yes
Chemical composition according to DIN (%)
C Si Mn P S Cr Mo Ni others
< 0.03 <1 <2 < 0.045 < 0.015* 16.5-18.5 2 - 2.5 10 - 13 N < 0.11
*S < 0.03% for bars, wires, profiles and corresponding semi-products
Physical properties
Density Electrical resistivity Specific heat Thermal conductivity
r [kg·m-3] r [µW·m] Cp [J·kg-1·K-1] l [W·m-1·K-1]
7'980 0.75 500 15
Coefficient of thermal expansion Elastic modulus
a [10-6·°C-1] between 20°C and E [GPa]
100 °C 200 °C 300 °C 400 °C 500 °C 600 °C 700 °C 200 at 20°C
16.5 17.5 17.5 18.5 18.5 19 19.5 172 at 400°C
Mechanical properties
Yield strength Tensile Elongation Vickers
State Rp0.2 [MPa] strength Hardness
20°C 100°C 200°C 300°C Rm [MPa] A5 [%] [HV]
Annealed 190 166 137 118 490-690 ≥45 150 - 200
Full hard 1300 1400 5 430
Thermal treatments
Type Temperature Time Protective atmosphere Cooling
[°C] [minutes]
Annealing 1020 -1080 15 - 60 H2 + N2 or cracked NH3 Rapid
Surface treatments
Type Solution Remarks
Pickling 6 - 25 % HNO3 + 0.5 - 8 % HF Only suitable in annealed condition, hot
Passivation 20 - 50% HNO3 Hot
Fabrication characteristics
This steel can easily be cold rolled, drawn and stamped. However, suitable tooling is required because of its high work hardening rate. This alloy may
become slightly magnetic with increasing cold working.
This stainless steel should not be maintained for a long time between 500°C and 900°C, because of possible precipitation of chromium carbides at
grain boundaries. A consecutive annealing for carbide dissolution is necessary, followed by rapid cooling to prevent a new precipitation. Quenching is
only required for big cross sections.
The pure steel 1.4404 is relatively difficult to machine, but there exist special executions with improved machinability, such as the steel Px or PM.

Welding, brazing and soldering

This steel can easily be welded by any conventional joining technique, except the oxyacetylene torch.
Depending on the welding conditions, some residual ferrite may form along the welding line.
There is no need for any post-weld heat treatment.
Welding electrodes: 1.4430, 1.4576.
Available products
Sheets, ribbons, wires, profiles, tubes, dimensions and tolerances on request.
The indications are basically founded on our actual know-how. This technical data sheet is without
commitment and not contracted.