Steel Р12Ф2К5М3 (ЭП863)

Designation

Name	The value
Designation GOST Cyrillic	Р12Ф2К5М3
Designation GOST Latin	P12F2K5M3
Transliteration	R12F2K5M3
By chemical elements	-

Name	The value
Designation GOST Cyrillic	ЭП863
Designation GOST Latin	EP863
Transliteration	EhP863
By chemical elements	-

Description

Р12Ф2К5М3 steel is used: for the production of hot rolled and forged round bars and square cross-sections up to 80 mm, intended for the manufacture of cutting tools used in machining high strength, heat resistant and stainless steels and alloys (shaped cutters, drills, reamers, core drills, taps, broaches, milling cutters (worm, disk, end, special), dalbekov, shaver).

Standards

Name	Code	Standards
Bars and shapes	В32	TU 14-131-859-92

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	V	Ti	Mo	W	Ce	Zr	Co
TU 14-131-859-92	0.9-1.5	≤0.03	≤0.03	0.4-0.6	3.5-4	≤0.4	≤0.5	Rest	1.8-2.4	0.1	2.5-3	11.5-12.5	0.12	0.06	5-5.5

Fe is the basis.
According to TU 14-131-859-92 the chemical composition is given for steel grade P12F2K5M3-SH (EP863-SH). In the finished metal, deviations in chemical composition are permissible: chromium +0.30%, tungsten 0.50%, cobalt + 0.50%, manganese ± 0.150%, silicon + 0.10%. Titanium, zirconium and cerium are introduced into the metal by calculation and chemical analysis are not determined.

Technological properties

Name	The value
Macrostructure and pollution	In the macrostructure of bars should be free of looseness, delamination, cosira, foreign inclusions or cracks visible without using the magnifying devices.
Microstructure	Depth bezoperatsionnogo layer hot-rolled and forged steels shall not exceed per side: 0,3 mm 2% of diameter or thickness for diameters or thicknesses up to 20 mm; 0.5 mm plus 1% of the diameter or thickness for diameters or thicknesses exceeding 20 mm. Carbide heterogeneity should not exceed the values depending on the diameter (side of square) rod: 20 mm ≤3.0 points; over 20 to 40 mm ≤5,0 points; over 40 up to 60 mm ≤6.0 points; over 60 to 80 mm ≤7.0 grade.
Operating conditions	Steel combines high heat resistance with high hardness. Has wear resistance at elevated temperatures and high resistance of plastic deformation. Also, steel stamps Р12Ф2К5М3, has better performance, due to the additional doping with cobalt and molybdenum.