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1.4112 stainless steel

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Martensitic stainless steel with high hardening capability (1.4112)

Code

X90CrMoV18

US standard (AISI)

440B

Composition

Alloying components [%]

C: 0.85 - 0.95

Cr: 17.00 - 19.00

Mn: 0 - 1.00

Mo: 0.90 - 1.30

P: 0 - 0.04

S: 0 - 0.015 (0.030*)

Si: 0 - 1.00

V: 0.07 - 0.12

Remainder: Fe

Stainless steel grade

C-

Density [g/cm³]

7.7

Yield point

Rp0.2 [N/mm²]

≥550

Tensile strength

Rm [N/mm²]

≤800

Corrosion resistance

- Medium

- Resistant to freshwater and water vapour

Machinability

Poor

Weldability

Not suitable

Other properties

- Nickel-free martensitic ferromagnetic structure

- Stainless tool steel with high resistance to wear

- Temperable to 58 - 60 HRC (Rm: 1800 - 2000 N/mm²)

- Can be mechanically polished to a brilliant sheen

- Suitability for electropolishing: medium

Main uses

Predominantly used for equipment and parts that are subject to heavy wear stress and require a high level of hardness:

- Knives

- Surgical cutting tools, mould inserts and active elements for plastics processing work involving chemically aggressive moulding compounds

- Shaped and flat knives for processing food and fish

- Hardened valve seats

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