АЦ28ХГН2АФБ steel is used: for the production of bars in high precision, used for the manufacture of sucker rods and other highly loaded parts of oil production equipment; wellhead rods for connection of the column of sucker rods from the pumping unit in oil sucker-rod pumps.

Note

Steel high strength high workability.

Standards

Name	Code	Standards
Bars and shapes	В32	TU 14-1-4495-88

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	Al	V	Nb	Ca	Sr
TU 14-1-4495-88	0.24-0.34	≤0.035	≤0.035	1-1.3	0.8-1.1	0.2-0.4	2-2.5	Rest	≤0.35	0.005-0.03	0.02-0.05	0.09-0.15	0.01-0.03	0.003-0.02	0.001-0.003

Fe is the basis.
According to TU 14-1-4495-88, deviations from the norms of chemical composition in accordance with GOST 4543: niobium +0.005%, nitrogen +0.002% are allowed in finished rolled steel provided that the requirements of TU 14-1-4495-88 on mechanical properties are fulfilled. Calcium and strontium are administered with a complex ligation according to calculation and chemical or other analysis does not determine.

Mechanical properties

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, MPa
Bars high precision in the delivery condition on the other 14-1-4495-88. Normalization at 900±15 °C, air cooling + Vacation, air cooling
25	67030	≥635	≥800	≥17	≥55	≥780	241-260
25	64030	≥780	≥910	≥14	≥50	≥390	286-321

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
HB	Brinell hardness number

Technological properties

Name	The value
Macrostructure and pollution	The macrostructure of rolled on the other 14-1-4495-88 should not have residues shrinkage, podnasadochnogo looseness, bubbles, cracks, placenow. Obesplozhennym layer on the surface of bars is not allowed.
Particularities of production of goods	Bars on the other 14-1-4495-88 are supplied in a normalized (air cooling with temperature end of rolling) of vacation. Depending on the hardness of the bars is divided into 2 groups of hardness - see Table mechanical properties.

Steel АЦ28ХГН2АФБ

Designation

Description