in Dnipro

Mülheim an der Ruhr
Dnieper
Kiev

Steel 55KHGR

Designation

Name	The value
Designation GOST Cyrillic	55ХГР
Designation GOST Latin	55XGP
Transliteration	55HGR
By chemical elements	55CrMnB

Description

55KHGR steel is used: for the manufacture of spring steel strip thickness 3,0−24,0 mm.

Note

Steel spring alloy quality.

Standards

Name	Code	Standards
Sheets and strips	В23	GOST 103-2006
Bars and shapes	В22	GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Steel wire medium and high carbon	В72	GOST 26366-84
Bars and shapes	В32	GOST 7417-75, GOST 7419-90, GOST 8559-75, GOST 8560-78, GOST 14955-77, GOST 14959-79, TU 14-1-2118-77, TU 14-11-245-88, TU 14-136-367-2008

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	B
GOST 14959-79	0.52-0.6	≤0.035	≤0.035	0.9-1.2	0.9-1.2	0.17-0.37	≤0.25	Rest	≤0.2	0.001-0.003

Fe is the basis.

Mechanical properties

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HRC
Rolled steel. Steel categories: 3, 3A, 3B, 3C, 3D, 4, 4A, 4B. Quenching in oil from 850 °C + vacation at 470 °C
	-	≥1175	≥1270	≥7	≥35	-	-
Rolled steel. Hardened in oil from 830 °C to + Vacation
-	350	≥1760	≥1910	≥7	≥38	≥500	≥51
-	400	≥1620	≥1810	≥7	≥40	≥530	≥49
-	450	≥1420	≥1570	≥9	≥41	≥579	≥45
-	500	≥1180	≥1370	≥11	≥47	≥696	≥41
-	550	≥1080	≥1180	≥12	≥51	≥834	≥37

Description mechanical marks

Name	Description
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	Limit short-term strength
d₅	Elongation after rupture
y	The relative narrowing
KCU	Toughness
HRC	Rockwell hardness (indenter diamond spheroconical)