Steel 08ГДНФ (SL-2; 08GDNFL)

Designation

Name The value
Designation GOST Cyrillic 08ГДНФ
Designation GOST Latin 08GDHF
Transliteration 08GDNF
By chemical elements 08MnCuНV
Name The value
Designation GOST Cyrillic СЛ-2
Designation GOST Latin CL-2
Transliteration SL-2
By chemical elements СBe-2
Name The value
Designation GOST Cyrillic 08ГДНФЛ
Designation GOST Latin 08GDHFL
Transliteration 08GDNFL
By chemical elements 08MnCuНV

Description

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 sT|s0,2, MPa σU, 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
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU 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.