Corrodur 4021 QT700

Nombres alternativos y comerciales
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

Los datos sobre este material han sido proporcionados por Deutsche Edelstahlwerke Specialty Steel (DEW).

A menos que se indique lo contrario, todas las medidas corresponden a condiciones de temperatura ambiente. A menos que se indique lo contrario, se utilizan las unidades del SI.
Las normas armonizadas son similares a uno o varios estándares del proveedor. Es posible que algunas normas armonizadas se ajusten al estándar original, mientras que otras pueden quedar fuera de su alcance.

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Propiedades

General

PropertyValue

Densidad

7.7 g/cm³

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Medidas

PropertyValueComment

Diámetro

160 mm

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max.

Mecánica

PropertyTemperatureValueComment

Charpy impact energy, V-notch

25 J

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Dureza Brinell

230 [-]

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annealed

Elongación

13 %

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A5

Límite elástico

20 °C

500 MPa

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RP02

100 °C

460 MPa

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RP02

150 °C

445 MPa

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RP02

200 °C

430 MPa

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RP02

250 °C

415 MPa

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RP02

300 °C

395 MPa

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RP02

350 °C

365 MPa

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RP02

400 °C

330 MPa

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RP02

Módulo elástico

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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Resistencia a la tracción

700 - 850 MPa

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Aplicaciones térmicas

PropertyTemperatureValueComment

Calor específico

460 J/(kg·K)

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Coeficiente de dilatación térmica

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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for 20°C to the mentioned temperature

Conductividad térmica

30 W/(m·K)

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Eléctrico

PropertyValue

Resistividad eléctrica

6e-07 Ω·m

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Chemical properties

PropertyValue

Azufre

0.01 - 0.03 %

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Carbono

0.16 - 0.25 %

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Cromo

12 - 14 %

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Fósforo

0.04 %

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Hierro

Balance

Manganeso

1 %

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Molibdeno

0.5 %

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Níquel

0.5 %

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Silicona

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: 650-750°C

Hot forming

It is formable at 800-1100°C

Processing history

Quenched and tempered, QT 700

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.