33KHS steel is used: for the manufacture of improved parts spring type of relatively small cross-sections, which require high strength, durability and elasticity.

Note

Structural steel high-quality chromium-silicon.

Standards

Name	Code	Standards
Sheets and strips	В23	GOST 103-2006
Bars and shapes	В32	GOST 1051-73, GOST 4543-71, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-1-2118-77, TU 14-11-245-88, TU 14-1-1271-75, TU 14-1-5228-93, TU 14-136-367-2008
Bars and shapes	В22	GOST 1133-71, GOST 8319.0-75, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-4944-90

Mechanical properties

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, MPa
Quenching in water or oil from 920 °C to + leave at 630 °C, cooling in water or oil
≤25	-	690	880	13	50	780	-
Quenching in water from 910 °C to + vacation at 600-620 °C, cooling in water
≤80	-	720	900	16	50	580	262
Quenching in oil from 900 °C + vacation at 200-400 °C (exposure 2 hours), air cooling
-	200	1610	1750	10	48	863	510
Quenching in oil with 920-940 °C + vacation at 250-270 °C, air cooling
≤40	-	-	1670	8	45	480	444-514
Quenching in water from 910 °C to + vacation at 600-620 °C, cooling in water
120-160	-	510	720	16	50	580	212
Quenching in oil from 900 °C + vacation at 200-400 °C (exposure 2 hours), air cooling
-	320	1490	1640	10	49	765	470
Normalizing at 920 °C, air cooling + vacation at 650-670 °C, air cooling
≤240	-	295	590	17	40	285	179
Quenching in water from 910 °C to + vacation at 600-620 °C, cooling in water
160-200	-	410	670	16	50	580	-
Quenching in oil from 900 °C + vacation at 200-400 °C (exposure 2 hours), air cooling
-	400	1340	1470	10	52	579	430
Quenching in water from 910 °C to + vacation at 600-620 °C, cooling in water
200-240	-	390	670	16	50	580	-
Quenching in oil from 900 °C + vacation at 520-600 °C (exposure 2 hours), cooling in water
-	520	1070	1180	14	59	863	350
Quenching in water from 910 °C to + vacation at 600-620 °C, cooling in water
80-120	-	650	840	16	50	580	-
Quenching in oil from 900 °C + vacation at 520-600 °C (exposure 2 hours), cooling in water
-	600	900	1110	18	63	1158	300
Quenching in oil from 910 °C to + vacation at 600-620 °C, cooling in water
≤30	-	780	940	12	50	580	285
30-50	-	670	860	12	50	580	255

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	Е, HPa	G, HPa	r, kg/m³	l, W/(m · °C)	a, 10^-6 1/°C	С, J/(kg · °C)
0	214	84	7640	40	-	-
20	214	-	7640	40	-	-
100	206	80	-	38	12	466
200	196	76	-	37	128	508
300	186	73	-	37	134	529
400	176	69	-	35	137	563
500	168	65	-	33	143	592
600	157	61	-	31	147	622
700	137	53	-	29	15	634
800	127	49	-	27	15	634
1000	-	-	-	-	124	664

A description of the physical symbols

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

Technological properties

Name	The value
Weldability	difficult weldability. Welding methods: RDS - necessary heating and subsequent heat treatment. CCC - a necessary subsequent heat treatment.
Склонность к отпускной хрупкости	inclined
The temperature of forging	Start - 1200 °C, the end - 850 °C.
Flock-sensitive sensitivity	not sensitive
Machinability	if NV are 229-269 Kn TV.SPL.=0.7 Kn b.St.=0.4

Steel 33KHS

Designation

Description