AISI 1040, 1.1186, DIN Ck40
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Specification, Chemical & Mechanical Performance
We can produce 1.1186, DIN Ck40, AISI 1040 stainless steel round rods, 1.1186, DIN Ck40, AISI 1040 forging,sheet,coil,and profiledstrip,Deformed steel,flat steel,mould,steel wire,have all specifications. With Bozhong production experience, strict control 1.1186, DIN Ck40, AISI 1040 chemical composition and 1.1186, DIN Ck40, AISI 1040 mechanical properties.From casting, forging, steel to hot and cold rolling process, heat treatment, etc, we have the control of professional engineers. We have advanced precision machining equipment, according to the requirements of users machining. in order to achieve the most satisfied with the user requirements.
Production specification
Round bar steel: 1mm to 3500mm
Square-shape steel: 1mm to 4000mm
Plate steel:0.1mm to 4000mm
Width: 10mm to 2500mm
Lenth: We can supply any lenth based on the customer's requirement.
Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes
Tubings: OD: φ6-1800mm, with wall thickness ranging from 1-35 mm.
Finished goods condition: hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering/any conditions based on the customer's requirement
Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement
Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.
Ultrasonic inspection: 100% ultrasonic inspection for any inperfections or based on the customer's requirementExcellent service for all kinds of industries,with advantages of technologies, equipment and price.
We serve you with our honesty, integrity, and professionality.
Designation by Standards
| Brand Name | LH No. | Mat. No. | DIN | JIS | AISI |
| CK40 | 634 | 1.1186 | Ck40 | S40C | 1040 |
Chemical Composition (in weight %)
| C | Si | Mn | Cr | Mo | Ni | V | W | Others |
| 0.41 | max. 0.40 | 0.65 | max. 0.40 | max. 0.10 | max.0.40 | - | - | (Cr+Mo+Ni) = max. 0.63 |
Description
CK40 steel has a higher (0.40%) carbon content for greater strength than the lower carbon alloys. It is hardenable by heat treatment, quench and tempering to develop 150 to 250 ksi tensile strength.
Applications
Used for crankshafts, couplings and cold headed parts.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 210
Density [g/cm3]: 7.84
Soft Annealing
Heat to 870-980oC, cool slowly in furnace.
Normalizing
Normalizing temperature: 890oC.
Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to approx. 590oC, holding for 1-2 hours at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.
Hardening
Harden from a temperature of 840-898oC followed by water quenching.
Tempering
Tempering from the quenched condition may be done at 320 to 700oC depending upon the strength desired.
Forging
Hot forming temperature: 1100-850oC.
Machinability
Machinability is good, rated at 60% that of the AISI 1112 alloy used as a 100% machining rated steel.
Corrosion Resistance
This is a steel alloy and will rust if not protected. it is not corrosion resistant.
Welding
CK40 steel is weldable by all of the welding methods. However with its higher carbon content it is important to use both pre-heat at 150 to 260oC and post-heat at 590 to 650oC practice per an approved welding procedure.
Cold working
In the annealed state the CK40 alloy is readily cold worked by conventional methods.
Mechanical properties
Heat treatment
