35ХН1М2ФА steel is used: for the manufacture of axles, shafts and other critical large parts with high requirements mechanical properties; workpieces disks of steam turbines with operating temperatures up to +350 °C.

Standards

Name	Code	Standards
Processing of metals by pressure. Forgings	В03	GOST 8479-70, TU 108-1028-81, ST ЦКБА 010-2004

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Mo
TU 108-1028-81	0.32-0.4	≤0.022	≤0.025	0.5-0.8	1.3-1.7	≤0.37	1.3-1.7	Rest	≤0.25	0.1-0.2	0.4-0.6

Fe is the basis.
According to TU 108-1028-81 the chemical composition is given for steel grade 35ХН1М2ФА. In the workpieces, deviations in the content of the elements indicated in the table are allowed: carbon ± 0.010%, silicon + 0.030%. In the manufacture of blanks with discs with hub heights from 450 to 650 mm, the content of phosphorus and sulfur in steel should not be more than 0.018% of each; for metal VDP and ELP, the deviation of manganese content +0.10% / - 0.15% is allowed. In the ESR steel, the sulfur content should not be more than 0.015%. When casting steel without evacuation, for the manufacture of disc blanks with a hub height of more than 300 mm, hydrogen content in the metal must be determined. The results of determination of the hydrogen content are not acceptance-delivery and, at the request of the consumer, are to be entered in the procurement certificate.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, MPa
Forged blanks of disks of steam turbines on the other 108-1028-81 (in the delivery condition specified strength; in cross-section, if regulated, see the recommended height of the hub)
≤450	664-833	≥815	≥12	≥40	≥490	-
Forgings according to ST CKBA 010-2004. Quenching in oil with 850-870 °C + Vacation at 570-640 °C, cooling with furnace or air
500-800	≥640	≥785	≥10	≥30	≥390	248-293
300-500	≥735	≥880	≥11	≥30	≥390	277-321
100-300	≥785	≥930	≥11	≥35	≥490	293-331
450	680-850	≥830	≥12	≥40	≥500	-

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

Physical characteristics

Temperature	r, kg/m³
0	7710

A description of the physical symbols

Name	Description
Е	The normal elasticity modulus
r	Density
l	Coefficient of thermal conductivity
R	UD. the resistivity

Technological properties

Name	The value
Weldability	Steel is not used for welded structures.
Склонность к отпускной хрупкости	Malosolone.
The temperature of forging	Start - 1200 °C, the end - of 800 °C. the cross Sections up to 100 mm are cooled in air, 101-300 mm in the pit.
Flock-sensitive sensitivity	A highly sensitive.

Steel 35ХН1М2ФА

Designation

Description