EN 1.4021, ASTM TYPE 420 Stainless Steel

EN 1.4021, ASTM TYPE 420 Stainless Steel

EN 1.4021, ASTM TYPE 420 Stainless Steel General Characteristics Very popular martensitic grade. Corrosion resistant in water and steam. Low-medium hardness for applications such as cutting utensils, surgical instruments, press plates, brake discs and mechanical parts. Typical Applications...
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EN 1.4021, ASTM TYPE 420 Stainless Steel

General Characteristics

Very popular martensitic grade. Corrosion resistant in water and steam. Low-medium hardness for applications such as cutting utensils, surgical instruments, press plates, brake discs and mechanical parts.


Typical Applications

  • Springs

  • Cutting utensils and surgical instruments

  • Press plates

  • Brake discs

  • Mechanical parts

  • Wear resistant applications


Chemical Composition

The chemical composition is shown in the table below.

The chemical composition is given as % by weight.



CMnCrNiMo

Typical

0.20


13.0



ASTM A240

0.15-

≤1.00

12.0-14.0

≤0.75

≤0.50

ASTM A240

0.15-

≤1.00

12.0-14.0

≤0.75

≤0.50

EN 10088-2

0.16-0.25

≤1.5

12.0-14.0



EN 10088-3

0.16-0.25

≤1.50

12.00-14.00



EN 10088-4

0.16-0.25

≤1.5

12.0-14.0




Mechanical Properties

The mechanical properties of the available products are given in the table below.


Standard

Rp0.2

Rp1.0RmElongationRockwellHB

MPa

MPa

MPa

%



Product type: Cold rolled coil and sheet

Typical (thickness 1 mm)

350

375

580




ASTM A240



≤ 690


≤ 96HRB

≤ 217

ASTM A240



≤ 690


≤ 96HRB

≤ 217

EN 10088-2



≤ 700

≥ 15



Product type: Hot rolled coil and sheet

Typical (thickness 4 mm)

360

405

575

29


83

EN 10088-2



≤ 700

≥ 15



Product type: Hot rolled quarto plate

Typical (thickness 15 mm)

500

580

650

20



Product type: Wire rod

Typical

500

580

650

20



1)Elongation according to EN standard:A80 for thickness below 3 mm.A for thickness = 3 mm.Elongation according to ASTM standard A2” or A50.


Physical Properties

Data according to EN 10088, EN 10095 or typical values.


DensityModulus of elasticityThermal exp. at 100 °CThermal conductivity

kg/dm3

GPa

10-6/°C

W/m°C

7.7

215

10,5

30


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