Forged / Hot rolled Alloy tool steel bars / square blocks 1.2343 / H11 / 4Cr5MoSiV / SKD6 / DIN X38CrMoV5-1 / BH11

Forged / Hot rolled Alloy tool steel bars / square blocks 1.2343 / H11 / 4Cr5MoSiV / SKD6 / DIN X38CrMoV5-1 / BH11

Brand Name	Ravne No.	Mat. No.	DIN	EN	AISI
RAVNEX	868	1.2343 Mod.	X38CrMoV51 Mod.	X38CrMoV51 Mod.	H11 Mod.

Chemical Composition (in weight %)

C	Si	Mn	Cr	Mo	Ni	V	W	Others
0.36	0.20	0.30	5.00	1.35	-	0.45	-	-

DescriptionSpecial production methods ensure optimal parameters in all phases of steelmaking, providing this steel grade with supreme characteristics resulting in a higher tool durability. This steel incorporates the knowledge and experience of many generations of tool steel specialists. ApplicationsAbove all, the grade is designed for die casting of light metals and alloys (aluminium and aluminium alloys), for die forging of steel and non-ferous metals (e.g. cupper) and their alloys, for extrusion of tubes, barrels and sections made of light metals and alloys, for casting and processing of various plastics, and for glass processing. Characterics: Excellent homogeneity, high cleanliness, high level of isotrophy, good workability, high impact toughness, good polishability. Advantages: Lower cost due to: Higher tool life, lower tool wear, less tool repair, less tool changes and consistent heat treatment results. Physical properties (avarage values) at ambient temperatureModulus of elasticity [103 x N/mm2]: Approx. 215 Density [g/cm3]: 7.85, 7.69 (500oC), 7.65 (600oC) Electric resistivity [Ohm mm2/m]: Apprx. 0.50Specific heat capacity[J/g.K]: Approx. 0.46Transformation points: Ac1=805oC, Ac3=880oCThermal Conductivity [W/m.K] vs. Temperature

100oC	200oC	300oC	400oC	500oC	600oC	700oC
28.4	29.7	30.2	30.1	30.0	29.7	30.0

Coefficient of Linear Thermal Expansion 10-6 oC-1

20-100oC	20-200oC	20-300oC	20-400oC	20-500oC	20-600oC	20-700oC	20-800oC
11.9	12.4	12.8	13.2	13.6	14.2	14.4	14.4

Soft AnnealingHeat to 800-850oC/ min. 4 hours at temperature then cool slowly in furnace. This will produce a maximum Brinell hardness of 209 HB.Stress RelievingStress relieving to remove machining stresses should be carried out by heating to approx. 600-650oC, holding for 3 hours at temperature, followed by slow cooling in furnace. This operation is performed to reduce distortion during heat treatment and to reduce stress after machining of tools prior to final heat treatemnt of tools.HardeningHarden from a temperature of 980-1000oC/ 30 minutes at temperature, followed by oil, thermal bath, air, vacuum and protective atmosphere quenching.Tempering1st tempering: 20-30oC over secondary peak in the tempering diagram.2nd tempering: Tempering to a working hardness of tool.Recommendation: 3rd tempering from 20-50oC down to bellow the temperature of 2nd tempering.Tempering: Slow heating up to tempering temperature is recommended, tempering tims: min. 2 hours and/or 1 hour for 20-25 mm thickness fo tool.Tempering Temperature (oC) vs. Hardness (HRC)

100oC	200oC	300oC	400oC	500oC	550oC	600oC	650oC
54	53	52	51.5	52	52	47	38

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