АЦ28ХГН3ФТ steel is used: for bars in high precision, used for the manufacture of sucker rods (to transfer the reciprocating or rotational motion from ground drive to the downhole oil pump); shaft hydroprotection (diameter 25, 30 and 35 mm); the shafts of submersible motors.

Note

Steel high strength high workability.

Standards

Name	Code	Standards
Bars and shapes	В32	TU 14-1-4398-88

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	V	Ti
TU 14-1-4398-88	0.24-0.34	≤0.035	≤0.035	1-1.3	0.8-1.1	0.2-0.4	2-2.5	Rest	0.09-0.15	0.005-0.025

Fe is the basis.
According to TU 14-1-4398-88, 0.02-0.03% calcium is calculated for microalloying to steel (0.001-0.020% for obtaining in finished metal) and 0.004-0.006% for barium (for the production of 0.001- 0.005%); chemical or other methods of analysis of calcium and barium do not determine. In the finished rolled products deviations from the norms of chemical composition are allowed in accordance with GOST 4543.

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 14-1-4398-88. Normalization at 900±15 °C, air cooling + Vacation, air cooling. In the delivery condition specified group hardness
24.99-37.99	67030	≥635	≥830	≥15	≥55	≥765	241-269
24.99-37.99	65030	≥835	≥930	≥13	≥45	≥383	285-321

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	In the macrostructure of bars on the other 14-1-4398-88 should not be the remnants of a shrinkage pipe, podnasadochnogo looseness, bubbles, cracks,placenow. Obesplozhennym layer on the surface And bars are not allowed.
Features of heat treatment	Bars on the other 14-1-4398-88 put in normalized (air cooling with temperature end of rolling) and the released condition with surface cold deformation during dressing-grinding. Depending on the hardness of the bars are subdivided into 2 groups (see Table mechanical properties).

Steel АЦ28ХГН3ФТ

Designation

Description