High carbon stainless steel plates and sheets W.-Nr. 1.4125 / DIN X105CrMo17 / AISI 440C / JIS SUS440C
Designation by Standards
|JIS SUS 440C|
Chemical Composition (in weight %)
|440C||0.95 - 1.20||1.00 max||1.00 max||16.00 - 18.00||0.75 max||-||0.60|
This is a high carbon martensitic stainless with moderate corrosion
resistance good strengthand the ability to obtain and keep excellent hardness HRC 60 and
wear resistance. export at ahoneststeel dot com
Ball bearings and races, gage blocks, molds and dies, cutlery,
valve components, knives andmeasuring instrumentsand other products with highest hardness and wear resistance.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103x N/mm2]: 200
Density [g/cm3]: 7.67
Thermal conductivity [W/m.K]: 24.2
Electric resistivity [Ohm mm2/m]: 0.60
Specific heat capacity[J/g.K]: 0.46
Coefficient of Linear Thermal Expansion 10-6oC-1
|20- 100oC||20- 200oC||20- 300oC||20- 400oC||20- 500oC||20- 600oC||20- 700oC|
Heat to 820-860oC, cool slowly in furnace. This will produce a maximum Brinell
hardness of 269.
Harden from a temperature of 1000-1050oC followed by oil or quenching.
Hardness after quenching is min. 58 HRC.
Tempering temperature: See the data bellow.
Tempering Temperature (oC) vs. Hardness (HRC)
Pre-heat to 760oC, then bring slowly up to 1038-1204oC before proceeding.
Do not work this material below 927oC.
Cool material slowly after working and once at room temperature,
Best machined in the annealed condition.
Tough, stringy chips can be best handled by the use of chip
Carbide or ceramic tooling is recommended.
This alloy is considered only slightly cold workable by common
Corrosion ResistanceResistant to a wide variety of media including fresh water, steam,
petroleum products and alcohol.
WeldingThis alloy is not commonly welded due to its tendency to air
If it must be welded, preheat to 260oC and post weld treat at 732-760oC for 6 hours followed
by a slow furnace cooling to avoid cracking. Use similar filler
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export at ahoneststeel dot ocm