Steel 12X17 (X17)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
12Х17 |
| Designation GOST Latin |
12X17 |
| Transliteration |
12H17 |
| The chemical elements |
12Cr17 |
| Name |
The value |
| Designation GOST Cyrillic |
Х17 |
| Designation GOST Latin |
X17 |
| Transliteration |
H17 |
| The chemical elements |
Cr17 |
Description
12X17 steel is used: for manufacturing of household articles and kitchen utensils, the equipment of factories of food and light industry; fasteners, rollers, bushings and other parts of machines and vessels working in dilute solutions of nitric, acetic, citric acids, solutions of salts having oxidative properties; for the production of heat exchangers and pipes.
Note
Steel ferritic corrosion-resistant and heat-resistant to +850 °C.
Temperature intense scaling in air +900 °C.
Usually applied, in the annealed condition.
Steel for the manufacture of welded structures is not recommended!
Standards
| Name |
Code |
Standards |
| Sheets and stripes |
В23 |
GOST 103-2006 |
| Sectional and shaped rolling |
В22 |
GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006 |
| Sheets and stripes |
В33 |
GOST 4405-75, GOST 5582-75, GOST 7350-77 |
| Classification, nomenclature and general norms |
В30 |
GOST 5632-72 |
| Sectional and shaped rolling |
В32 |
GOST 5949-75, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-11-245-88, TU 14-1-1271-75 |
| Pipes steel and connecting parts to them |
В62 |
GOST 9940-81, GOST 9941-81, TU 14-3-1654-89 |
| Bulls. Blanks. Slabs |
В31 |
OST 3-1686-90, TU 14-1-565-84 |
| Metal forming. Forgings |
В03 |
ST ЦКБА 010-2004, STP М386-79 |
| Thermal and thermochemical treatment of metals |
В04 |
ST ЦКБА 016-2005 |
| Castings with special properties (cast iron and steel) |
В83 |
TU 14-1-1650-76 |
| Tapes |
В34 |
TU 14-1-367-72 |
| Steel alloy wire |
В73 |
TU 14-4-740-76 |
| Steel wire medium- and high-carbon |
В72 |
TU 14-4-932-78 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Fe |
Cu |
V |
Ti |
Mo |
W |
| GOST 5632-72 |
≤0.12 |
≤0.025 |
≤0.035 |
≤0.8 |
16-18 |
≤0.8 |
The rest |
≤0.3 |
≤0.2 |
≤0.2 |
≤0.3 |
≤0.2 |
Fe is the basis.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
Brinell hardness number, MPa |
| Blank pieces of pipe fittings according to ST CKBA 016-2005. Annealing at 760-780 °C, air cooling or Annealing at 760-780 °C, air cooling |
| ≤60 |
≥245 |
≥392 |
≥20 |
≥50 |
≥294 |
126-197 |
| A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 1.1 mm/min strain Rate of 0.0004 1/s |
| - |
- |
≥84 |
≥67 |
≥97 |
- |
- |
| Blank pieces of pipe fittings according to ST CKBA 016-2005. Annealing at 760-780 °C, air cooling or Annealing at 780-810 °C (20 h exposure), cooling with the furnace |
| ≤60 |
≥157 |
≥392 |
≥25 |
≥55 |
≥49 |
126-197 |
| A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 1.1 mm/min strain Rate of 0.0004 1/s |
| - |
- |
≥40 |
≥64 |
≥98 |
- |
- |
| Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Annealing or vacation at 740-780 °C |
| - |
- |
≥490 |
≥20 |
- |
- |
- |
| A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 1.1 mm/min strain Rate of 0.0004 1/s |
| - |
- |
≥22 |
≥58 |
≥98 |
- |
- |
| Hot rolled sheet (4,0-25,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Annealing or vacation at 760-780 °C, air cooling or furnace |
| - |
- |
≥440 |
≥18 |
- |
- |
- |
| A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 1.1 mm/min strain Rate of 0.0004 1/s |
| - |
- |
≥21 |
≥81 |
≥97 |
- |
- |
| Bars hot rolled and forged according to GOST 5949-75. Annealing at 760-780 °C, air cooling or water |
|
≥245 |
≥390 |
≥20 |
≥50 |
- |
- |
| A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 1.1 mm/min strain Rate of 0.0004 1/s |
| - |
- |
≥14 |
≥73 |
≥97 |
- |
- |
| Seamless hot deformed tubes in the delivery condition according to GOST 9940-81 |
|
- |
≤441 |
≥17 |
- |
- |
- |
| A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 1.1 mm/min strain Rate of 0.0004 1/s |
| - |
- |
≥8 |
≥85 |
≥99 |
- |
- |
| Tubes in the delivery condition. Annealing or vacation at 740-780 °C (in cross-section shows the thickness of the wall) |
| 3.5-32 |
- |
≤441 |
≥17 |
- |
- |
- |
| A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 1.1 mm/min strain Rate of 0.0004 1/s |
| - |
- |
≥6 |
≥99 |
≥97 |
- |
- |
| Tubes in the delivery condition. Annealing or vacation at 740-780 °C (in cross-section shows the thickness of the wall) |
| 0.2-22 |
- |
≤441 |
≥17 |
- |
- |
- |
| Rolled steel. Annealing at 780 °C, air cooling |
| - |
≥310 |
≤510 |
≥28 |
≥70 |
- |
- |
| - |
≥290 |
≤450 |
≥27 |
- |
- |
- |
| - |
≥265 |
≤460 |
≥26 |
- |
- |
- |
| - |
≥255 |
≤440 |
≥25 |
- |
- |
- |
| - |
≥145 |
≤195 |
- |
- |
- |
- |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
| kJ/m2 |
Toughness |
Physical characteristics
| Temperature |
Е, ГПа |
G, ГПа |
r, кг/м3 |
l, Вт/(м · °С) |
R, НОм · м |
a, 10-6 1/°С |
С, Дж/(кг · °С) |
| 0 |
232 |
93 |
7720 |
- |
560 |
- |
- |
| 20 |
232 |
- |
7720 |
- |
560 |
- |
- |
| 100 |
227 |
89 |
- |
24 |
610 |
104 |
462 |
| 200 |
219 |
85 |
- |
24 |
680 |
105 |
- |
| 300 |
211 |
82 |
- |
25 |
770 |
108 |
462 |
| 400 |
201 |
78 |
- |
26 |
850 |
112 |
- |
| 500 |
192 |
85 |
- |
26 |
950 |
114 |
- |
| 600 |
182 |
69 |
- |
- |
1030 |
116 |
- |
| 700 |
165 |
61 |
- |
- |
1110 |
119 |
- |
| 800 |
148 |
- |
- |
- |
1150 |
119 |
- |
| 900 |
- |
- |
- |
- |
1160 |
- |
- |
| 1000 |
- |
- |
- |
- |
- |
121 |
- |
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 |
Difficult weldability. Welding methods: RDS, ARDS. Recommended subsequent heat treatment. |
| Propensity to temper brittleness |
Inclined at a temperature of +475 °C during long exposures. |
| Forging temperature |
Start - 1250 °C, the end of - 900 °C. the cross Sections up to 350 mm cooled in air. |
| Features of heat treatment |
To obtain characteristic values of mechanical properties and hardness set ST CKBA 010 and to achieve maximum corrosion resistance, parts (workpiece) valves shall be subjected to annealing. To reduce the residual magnetic induction in the magnetic circuit of the electromagnets of the details (blank) should be subjected to prolonged annealing. Prolonged annealing of workpieces is applied to reduce the residual magnetic induction in the magnetic circuit of the electromagnets and provides magnetic properties to steel grade 12X17 coercive force HC equal to 0,23 ka/m in residual magnetic induction, RF 0.3 Mm TL; the largest saturation induction Bs is 1.6 T at 20 Nm ka/I. Welded components and products of steel 12X17 for improving the corrosion resistance is subjected to annealing regime: heating up to 775-800 °C, exposure - 2-3 h, air cooling in the absence of the requirements of the resistance to the ICC; heating to 780-820 °C, exposure - 8 hours air cooling when the demand resistance to the ICC. |
