What is stainless steel 316L (UNS 31603)1.4404?
1.4404 is an acid-resisting austenitic stainless steel with 17% Cr, 12% Ni and 2,0% MO. Due to its Mo content, this material has a significantly improved corrosion resistance compared to stainless steels. 1.4404 is resistant to reducing action of organic and inorganic acids as well as against halogen-containing media. Außerdem, this steel is less susceptible to pitting. The low carbon content also improves the resistance to intergranular corrosion and allows use at higher temperatures up to 450 ° C in continuous operation. 1.4404 can be cold worked and weld excellent. This material is mainly used in the chemical, textile and paper industries, and is often used in apparatus, in sanitary industry and in pipe fabrication.
Equivalent Grades of Stainless Steel 1.4404
| EU IN | USA – | Deutschland AUS,Machen | Japan ER | Frankreich Afnor | England BS | Italien Uni | China GB | Schweden Ss | Polen Pn | Tschechien CSN | Finnland SFS | Österreich Onorm | Inter ISO |
| X2CrNiMo17-12-2 (1.4404) | 316L | X2CrNiMo17-13-2 | SUS316SUS316L | Z2CND17-12Z3CND17-11-02Z3CND18-12-02 | 316S11 | X2CrNiMo17-12X2CrNiMo17-17-12 | 00Cr17Ni14Mo20Cr18Ni12Mo2Ti | 2348 | 00H17N13M200H17N14M2 | 17349 | 750 | X2CrNiMo17-13-2KKW | Type19 |
Ss 1.4404 Chemische Zusammensetzung(%)
| C | Und | Mn | P | S | Cr | MO | In | N |
| ≤ % | ≤ % | ≤ % | ≤ % | ≤ % | % | % | % | ≤ % |
| 0,03 | 1,0 | 2,0 | 0,045 | 0,015 | 16,5-18,5 | 2,0-2,5 | 10,0-13,0 | 0,11 |
Mechanische Eigenschaften
The values given refer to the diameter range ≤ 160 (Ø in mm) Und 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)
Physikalische Eigenschaften
| Density in kg/dm3 | 8,0 |
| Thermal conductivity at 20°C in W/(m K) | 15 |
| Electr. Resistance at 20°C (Ω mm2 /m) | 0,75 |
| Specific heat capacity at 20°C (J/kg K) | 500 |
Supplied Forms
Blatt;Streifen;Rohr;Bar;Rohr;Platte;Armaturen & Flanges;Angle.
Korrosionsbeständigkeit
Due to the low carbon content, the material 1.4404 is resistant to intercrystalline corrosion but not sea water resistant. In natural environmental media and moderate concentrations of chlorine and salt, this grade of material has excellent corrosion resistance.
Fabrication
Die Herstellung aller Edelstähle sollte nur mit Werkzeugen durchgeführt werden, die den Materialien aus Edelstahl gewidmet sind. Werkzeug- und Arbeitsflächen müssen vor dem Gebrauch gründlich gereinigt werden. Diese Vorsichtsmaßnahmen sind erforderlich, um eine Kreuzkontamination von Edelstahl durch leicht korrodierte Metalle zu vermeiden, die die Oberfläche des hergestellten Produkts verfärben können.
Wärmebehandlung
Cold Working
Grad 316 is readily brake or roll formed into a variety of parts. It is also suited to stamping, heading and drawing but post work annealing is recommended to relieve internal stresses.
Cold working will increase both strength and hardness of 316 Edelstahl.
Heißes Arbeiten
All common hot working processes can be performed on 316 Edelstahl. Hot working should be avoided below 927°C. The ideal temperature range for hot working is 1149-1260°C. Post-work annealing is recommended to ensure optimum corrosion resistance.
Verarbeitbarkeit
AISI 316L stainless steel has medium machinability. In direct comparison, the machinability of this stainless steel grade is better than that of Aisi 316/1.4401 due to its lower carbon content.
Welding
AISI 316L stainless steel (1.4404 / X2CrNiMo17-12-2) has excellent weldability. The material can be used with all common welding methods (with the exception of gas welding). The addition of a welding filler metal and subsequent heat treatment are not normally required. Resistance to intergranular corrosion is not affected by welding.
Anwendungen
- Pulp and paper equipment;
- Heat exchanger;
- Dyeing equipment;
- Film processing equipment;
- Pipeline;
- Materials for exterior construction in coastal areas;
- Watch bracelet, case, usw. for advanced watches;
- Equipment for the use of marine, chemicals, dyes, paper, oxalic acid, fertilizer, usw.;
- Food industry;
- Rope;
- CD pole;
- Bolts and nuts;