08ГДНФ steel is used: for the manufacture of litho-welded and composite structures, performance parts, requirements of high viscosity and of sufficient strength, operating at temperatures from -50 to +350 °C; castings and forgings; casting parts of pipe fittings; casting parts, steam, gas, hydraulic turbines, and axial compressors; various forgings of large parts for shipbuilding-sections up to 750 mm, die forging parts for shipbuilding and ship repair.

Note

Dispersion-hardening steel of pearlitic class.

Standards

Name	Code	Standards
Steel castings	В82	GOST 977-88, OST 108.961.04-80, OST 5Р.9285-95, TU 108.11.352-87, TU 108-978-80, TU 108-989-80
Processing of metals by pressure. Forgings	В03	OST 5Р.9125-84
Welding and cutting metals. Soldering, riveting	В05	RTM 108.020.122-78
Thermal and thermochemical treatment of metals	В04	ST ЦКБА 026-2005
Sheets and strips	В33	TU 108.1273-84, TU 14-1-2707-79
Blanks. Of the workpiece. Slabs	В31	TU 14-1-2788-79, TU 108-11-514-80

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V
TU 108.1273-84	≤0.1	≤0.03	≤0.03	0.8-1.2	≤0.3	0.15-0.4	1.15-1.55	Rest	0.8-1.2	0.08-1.2
OST 5Р.9125-84	≤0.1	≤0.04	≤0.04	0.8-1.2	≤0.3	0.15-0.4	1.15-1.55	Rest	0.8-1.2	0.08-0.12
TU 108-11-514-80	≤0.1	≤0.04	≤0.04	0.8-1.2	≤0.3	0.15-0.4	1.15-1.55	Rest	0.8-1.2	0.08-0.12
GOST 977-88	≤0.1	≤0.035	≤0.035	0.6-1	-	0.15-0.4	1.15-1.55	Rest	0.8-1.2	0.1

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d	y, %	KCU, kJ/m²	HB, MPa
The sheets in the delivery condition on the other 108.1273-84
-	≥343	≥441	≥18	-	≥40	-	-
Blank pieces of pipe armature. Quenching in water from 900-940 °C (exposure for 2.5-4.5 hours depending on the thickness and weight of the workpiece) + vacation at 590-630 °C, air cooling
200	440	539	-	20	45	392	159-208
Normalization 920-930 °C, air. Vacation 580-600 °C, cooling for 1 hour with the oven, then in air (indicated as the place of clippings sample)
200	395-400	500-510	-	28-36	58-72	191-251	156-170
Casting a cross section of 30 mm. Normalization at 920-930 °C + vacation at 580-600 °C, 1 h cooling with the furnace, then air
-	355-450	450-560	-	21-28	60-72	-	-
Blank pieces of pipe armature. Annealing in air from 900-940 °C (exposure for 2.5-4.5 hours depending on the thickness and weight of the workpiece) + vacation at 500-560 °C, air cooling
200	395	490	-	20	45	392	159-192
Normalization 920-930 °C, air. Vacation 580-600 °C, cooling for 1 hour with the oven, then in air (indicated as the place of clippings sample)
10	410-460	540-620	-	22-31	57-74	174-206	170-178
Casting a cross section of 30 mm. Normalization at 920-930 °C + vacation at 580-600 °C, 1 h cooling with the furnace, then air
-	345-410	460-540	-	18-22	54-68	-	-
Normalization 920-930 °C, air. Vacation 580-600 °C, cooling for 1 hour with the oven, then in air (indicated as the place of clippings sample)
200	380-390	420-510	-	11-31	28-61	239-245	156
Casting a cross section of 30 mm. Normalization at 920-930 °C + vacation at 580-600 °C, 1 h cooling with the furnace, then air
-	310-420	460-540	-	15-20	43-58	-	-
Normalization 920-930 °C, air. Vacation 580-600 °C, cooling for 1 hour with the oven, then in air (indicated as the place of clippings sample)
30	400-455	510-560	-	25-31	47-69	186-220	162-178
Casting parts of gas turbines. Normalization at 930-970 °C, air cooling + normalization at 920-950 °C, air cooling + vacation at 590-650 °C, air cooling
-	≥343	≥441	-	≥18	≥30	≥490	130-180
Casting a cross section of 30 mm. Normalization at 920-930 °C + vacation at 580-600 °C, 1 h cooling with the furnace, then air
-	310-370	440-500	-	18-22	43-58	-	-
Normalization 920-930 °C, air. Vacation 580-600 °C, cooling for 1 hour with the oven, then in air (indicated as the place of clippings sample)
50	395-400	495-520	-	28-33	71-74	186-236	156-162
Castings for shipbuilding. 1-I Normalization at 930-970 °C + 2-I Normalization at 920-950 °C + vacation at 590-650 °C, air cooling
-	≥380	≥480	-	≥20	≥45	≥800	159-192
Casting a cross section of 30 mm. Normalization at 920-930 °C + vacation at 580-600 °C, 1 h cooling with the furnace, then air
-	245-325	295-390	-	12-31	39-66	-	-
Normalization at 900-920 °C, air cooling + vacation at 600-650 °C, air cooling (named place of clippings sample)
20	400-445	510-540	-	14-29	42-63	74-117	-
Castings for shipbuilding. Normalization at 930-970 °C + quenching in water from 920-950 °C + vacation at 590-650 °C, air cooling
-	≥400	≥500	-	≥20	≥45	≥800	159-192
Casting. Normalization at 920-950 °C or Normalizing at 920-950 °C + vacation at 590-650 °C, air cooling
100	≥343	≥441	-	≥18	≥30	≥491	-
Normalization at 900-920 °C, air cooling + vacation at 600-650 °C, air cooling (named place of clippings sample)
40	395-465	475-570	-	13-29	39-71	82-166	-
Forgings for parts resistant to the ICC. Quenching in water from 900-940 °C + vacation at 590-630 °C, air cooling
200	440	540	-	20	45	392	159-229
Normalization at 930-970 °C, air cooling + normalization at 900-920 °C, air cooling + vacation at 600-650 °C, air cooling
100	385-425	500-550	-	12-22	25-39	81-115	-
Forgings for parts resistant to the ICC. When normalizing 900-940 °C, air cooling + vacation at 590-630 °C, air cooling
200-300	343	441	-	20	45	294	159-192
Normalization at 930-970 °C, air cooling + normalization at 900-920 °C, air cooling + vacation at 600-650 °C, air cooling
100	390-425	510-540	-	21-29	35-63	90-169	-
Forgings for parts resistant to the ICC. When normalizing 900-940 °C, air cooling + vacation at 590-630 °C, air cooling
300-450	294	392	-	20	45	294	159-192
Normalization at 930-970 °C, air cooling + normalization at 900-920 °C, air cooling + vacation at 600-650 °C, air cooling
175	380	480	-	20	37	159	-
Forgings for parts resistant to the ICC. When normalizing 900-940 °C, air cooling + vacation at 590-630 °C, air cooling
200	392	490	-	20	45	392	159-192
Normalization at 930-970 °C, air cooling + normalization at 900-920 °C, air cooling + vacation at 600-650 °C, air cooling
175	380-390	480-490	-	30	52-57	175-190	-
250	380-390	490-495	-	17-18	23-30	35-48	-
250	395-400	510	-	25-27	48-51	107-112	-

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
d	Elongation after rupture
y	The relative narrowing
KCU	Toughness
HB	Brinell hardness number

Physical characteristics

Temperature	Е, HPa	G, HPa	l, W/(m · °C)	R, Mr. · m	a, 10^-6 1/°C	С, J/(kg · °C)
200	201	78	39	367	113	500
500	167	64	35	753	136	554
800	127	48	28	1125	125	697

A description of the physical symbols

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

Technological properties

Name	The value
Weldability	Welded without any restrictions. The welding process - SMAW. With a significant amount of welding it is recommended that subsequent vacation.
Склонность к отпускной хрупкости	Tend not.
Flock-sensitive sensitivity	not sensitive.
Welding defects	Welding defects of castings after cutting is usually carried out without prior and concomitant heating. By semiautomatic welding in carbon dioxide environment used welding wire SV-08G2S diameter of 2 mm at a current of 380-420 A. Welding defects by manual welding is done with electrodes type e-50A (GOST 9467) brand SSSI-13/55. When the welding of defects of samples with a volume of more than 10000 cm3 you need to make thinning after filling half of the sample.

Steel 08ГДНФ (SL-2; 08GDNFL)

Designation

Description