Product groups

1.4542 stainless steel

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Martensitic precipitation hardening steel, niobium-stabilised, with very good yield strength properties (1.4542)

Code

X5CrNiCuNb16-4

US standard (AISI)

630

Composition

Alloying components [%]

C: 0 - 0.07

Cr: 15.00 - 17.00

Cu: 3.00 - 5.00

Mn: 0 - 1.50

Mo: 0 - 0.60

Ni: 3.00 - 5.00

P: 0 - 0.04

S: 0 - 0.015 (0.030*)

Si: 0 - 0.70

Nb: 5 x C - 0.45

Remainder: Fe

Stainless steel grade

C3

Density [g/cm³]

7.8

Nickel migration

[µg/(cm² x week)] in artificial perspiration (pH 4.5)

<0.05

Yield point

Rp0.2 [N/mm²]

≥1000

Tensile strength

Rm [N/mm²]

≥1270

Corrosion resistance

- Good

- Resistant to all natural environmental conditions and quiet seawater

Machinability

Medium - poor

Weldability

Good

Other properties

- Martensitic ferromagnetic structure that is particularly strong after precipitation hardening

- Cannot be mechanically polished with satisfactory results

- Suitability for electropolishing: medium

- For use in the temperature range -50 - 450°C

Main uses

1.4542 is used when high levels of strength are required in combination with good corrosion resistance:

- Bolts/screws

- Spindles, axles

- Hub plates

- Shipbuilding equipment

- Offshore equipment

- Aerospace

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