Forged / Hot rolled Alloy tool steel bars / square blocks 1.2311 / 5CrMnMo / SKT3 / ASTM 6G / 40CrMnMo7

1. Process: EAF+LF+VD+Forging/rolling 2. Certificate: CCS, GL, KR, LR, ISO 3. Delivery time: 30 days 4. MOQ: 20 Ton

Designation by Standards

Brand Name	Ravne No.	Mat. No.	DIN	EN	AISI
UTOPNEX	772	1.2311	40CrMnMo7	-	Approx. P20

Chemical Composition (in weight %)

C	Si	Mn	Cr	Mo	Ni	V	W	Others
0.40	0.30	1.45	1.95	0.20	-	-	-	-

DescriptionPrehardened plastic mould steel with good machinability, better than steel grade Mat. No. 1.2312, suitable for texturing.ApplicationsPlastic moulds, mould frames for plastic moulds, large injection moulds, pressure casting dies,recipient sleeves. Physical properties (avarage values) at ambient temperatureModulus of elasticity [103 x N/mm2]: 210 Density [g/cm3]: 7.83Thermal conductivity [W/m.K]: 34.0 (100oC), 34.0 (150oC), 33.6 (200oC), 32.9 (250oC), 31.9 (300oC), in quenched and tempered condition.Coefficient of Linear Thermal Expansion 10-6 oC-1

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

Soft AnnealingHeat to 710-740oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 230.Stress RelievingStress relieving to remove machining stresses should be carried out by heating to approx. 650oC, holding for 1-2 hours at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.HardeningHarden from a temperature of 830-880oC followed by oil or air quenching or warm bath quenching 180-220oC. Hardness after quenching is 51 HRC.TemperingTempering temperature: See the data bellow.Tempering Temperature (oC) vs. Hardness (HRC)

100oC	200oC	300oC	400oC	500oC	600oC	700oC
51	50	48	46	42	36	28

ForgingHot forming temperature: 1050-850oC. MachinabilityMachinability is relatively good at about 80% that of the W group water hardening steelsCorrosion Resistance This is a steel alloy and it will corrode or rust unless protected.Welding This alloy is weldable by conventional methods. Contact the alloy supplier for details and weld procedures.Cold working This steel may be readily cold worked by conventional tooling with the alloy in the annealed condition.

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