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P20+S Tool Steel / 1.2312 / DIN 40CrMnMoS8-6

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Specification, Chemical & Mechanical Performance

We can produce 1.2312, DIN 40CrMnMoS8-6 stainless steel round rods, 1.2312, DIN 40CrMnMoS8-6 forging,sheet,coil,and profiledstrip,Deformed steel,flat steel,mould,steel wire,have all specifications. With DuoNian production experience, strict control 1.2312, DIN 40CrMnMoS8-6 chemical composition and 1.2312, DIN 40CrMnMoS8-6 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	Ravne No.	Mat. No.	DIN	EN	AISI
UTOPN	764	1.2312	40CrMnMoS8-6	-	-

Chemical Composition (in weight %)

C	Si	Mn	Cr	Mo	Ni	V	W	Others
0.40	0.40	1.50	1.90	0.20	-	-	-	-

Description
Cold working tool steel. It is generally supplied hardened and tempered to 880-1080 N/mm². Higher sulphur content proviedes good machinability at relatively high hardness.Possibility of nitriding. Steel has good polishability.

Applications
Tools for plastics processing and moulds for pressure die casting.

Physical properties (avarage values) at ambient temperature
Modulus of elasticity [10³ x N/mm²]: 210
Density [g/cm³]: 7.83
Thermal conductivity [W/m.K]: 33.3
Electric resistivity [Ohm mm²/m]: 0.19
Specific heat capacity[J/g.K]: 0.46

Coefficient of Linear Thermal Expansion 10^-6 ^oC^-1

20-100^oC	20-200^oC	20-300^oC	20-400^oC	20-500^oC	20-600^oC	20-700^oC
11.7	13.1	13.5	14.0	14.4	14.6	14.7

Continuous Cooling Transformation (CCT) Diagram

Time-Temperature Transformation (TTT) Diagram

Soft Annealing
Heat to 710-740^oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 230.

Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to approx. 650^oC, 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 830-880^oC followed by oil or quenching or warm bath quenching 180-220^oC. Hardness after quenching is 51 HRC.

Tempering
Tempering temperature: See the data bellow.

Tempering Temperature (^oC) vs. Hardness (HRC)