Corrodur 4021 QT800

Alternative und Handelsbezeichungen
Corrodur 4021, X20Cr13, 1.4021, 420, SUS 420J1, 20X133
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Description

1.4021 (X20Cr13) is used in the quenched and tempered condition in a host of constructional and fastener applications where moderate corrosion resistance is required. The knife blade variant of 1.4021 can be polished to high gloss finishes. Optimal corrosion resistance is also attained when the surface is finely ground or polished.

Related Standards

Equivalent Materials

Diese Materialdaten wurden von Deutsche Edelstahlwerke Specialty Steel (DEW) zur Verfügung gestellt

Alle Daten beziehen sich auf Raumtemperatur soweit nicht anderweitig spezifiziert. SI Einheiten werden verwendt soweit nicht anderweitig spezifiziert.
Äquivalente Standards sind ähnlich zu einem oder mehreren Standards die der Anbieter angegeben hat. Manche äquivalente Standards können strikter sein oder außerhalb der Bedingungen des ursprünglichen Standards.

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Eigenschaften

Allgemein

PropertyValue

Dichte

7.7 g/cm³

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Abmessung

PropertyValueComment

Durchmesser

160 mm

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max.

Mechanisch

PropertyTemperatureValueComment

Charpy impact energy, V-notch

20 J

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Dehnung

12 %

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A5

Elastizitätsmodul

20 °C

215 GPa

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100 °C

212 GPa

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200 °C

205 GPa

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300 °C

200 GPa

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400 °C

190 GPa

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Härte, Brinell

230 [-]

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annealed

Streckgrenze

20 °C

600 MPa

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RP02

100 °C

515 MPa

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RP02

150 °C

495 MPa

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RP02

200 °C

475 MPa

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RP02

250 °C

460 MPa

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RP02

300 °C

440 MPa

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RP02

350 °C

405 MPa

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RP02

400 °C

355 MPa

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RP02

Zugfestigkeit

800 - 950 MPa

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Thermisch

PropertyTemperatureValueComment

Koeffizient der thermischen Ausdehnung

100 °C

1.05e-05 1/K

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for 20°C to the mentioned temperature

200 °C

1.1e-05 1/K

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for 20°C to the mentioned temperature

300 °C

1.15e-05 1/K

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for 20°C to the mentioned temperature

400 °C

1.2e-05 1/K

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Spezifische Wärmekapazität

460 J/(kg·K)

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Wärmeleitfähigkeit

30 W/(m·K)

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Elektrisch

PropertyValue

spezifischer Widerstand

6e-07 Ω·m

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Chemical properties

PropertyValue

Chrom

12 - 14 %

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Eisen

Balance

Kohlenstoff

0.16 - 0.25 %

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Mangan

1 %

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Molybdän

0.5 %

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Nickel

0.5 %

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Phosphor

0.04 %

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Schwefel

0.01 - 0.03 %

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Silizium

1 %

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Technological properties

Property
Application areas

Automotive industry, Decorative Applications, Hydraulic Equipment, Petrochemical industry, Food and Beverage industry, Mechanical engineering, Cutlery, Blades

Corrosion properties

Average - Good corrosion resistance in moderately corrosive environments that are free of chlorides, such as soaps, detergents and organic acids. Good resistance in oxidising atmospheres up to temperatures of about 600 °C. 1.4021 is not resistant to intergranular corrosion in the asdelivered or as-welded conditions. PRE = 12.0 – 14.0

General machinability

Good - The machinability of this grade of stainless steel is directly related to its hardness. 1.4021 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.

Heat Treatment

Soft annealing: 745-825°C (Cooling in furnace, air) - Hardening: 950-1050°C and quenching in air, polymer, oil - Tempering: 600-700°C

Hot forming

It is formable at 800-1100°C

Processing history

Quenched and tempered, QT 800

Welding

Good - Preheating of the work piece to a temperature within the range 100 °C – 300 °C is required as well as a post weld tempering treatment when welding is performed using a matching filler material. Generally, Novonit® 4551 is recommended when a filler material is required. Tempering at 650 °C after welding is recommended to restore some of the ductility in the weld zone. When using an inert or protective shielding gas during welding, care must be taken to avoid use of any hydrogen or nitrogen containing gases since contamination of the weld with nitrogen or hydrogen will adversely affect the mechanical properties. After welding the work piece must be cooled to below the martensite start (MS), temperature of approximately 120 °C before being tempered.