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Martensitic stainless steel with extremely high hardening capability (1.4125)
Code
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X10CrMo17
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US standard (AISI)
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440C
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Composition
Alloying components [%]
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C: 0.95 - 1.20
Cr: 16.00 - 18.00
Mn: 0 - 1.00
Mo: 0.40 - 0.80
P: 0 - 0.04
S: 0 - 0.015 (0.030*)
Si: 0 - 1.00
Remainder: Fe
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Stainless steel grade
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C3
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Density [g/cm³]
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7.7
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Yield point
Rp0.2 [N/mm²]
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≥600
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Tensile strength
Rm [N/mm²]
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≤850
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Corrosion resistance
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- Medium
- Resistant to freshwater and water vapour as well as mildly aggressive cleaning agents
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Machinability
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Poor
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Weldability
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Not suitable
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Other properties
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- Nickel-free martensitic ferromagnetic structure
- Special steel with very high resistance to wear
- Temperable to 61 HRC (Rm: >2000 N/mm²)
- Can be mechanically polished to a brilliant sheen
- Suitability for electropolishing: medium
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Main uses
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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
- Corrosion-protected wear parts
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