Steel 58 (55пп)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
58 |
| Designation GOST Latin |
58 |
| Transliteration |
58 |
| The chemical elements |
58 |
| Name |
The value |
| Designation GOST Cyrillic |
55пп |
| Designation GOST Latin |
55pp |
| Transliteration |
55pp |
| The chemical elements |
55 |
Description
58 steel is used: for the manufacture of parts with thin cross sections uprochneniya elements — gear of the middle module, bushings, plates and other parts; after surface hardening with heating HDTV — details, requirements high wear resistance in the viscous core operating at large speeds and medium specific pressures; automotive components.
Note
The degree of deoxidation — SP.
Steel with low hardenability.
Standards
| Name |
Code |
Standards |
| Sectional and shaped rolling |
В32 |
GOST 1050-88, GOST 7417-75, GOST 8559-75, GOST 14955-77, GOST 1050-2013, TU 14-1-5414-2001, TU 14-1-1926-76, TU 14-1-2118-77, TU 14-170-110-90, TU 14-11-245-88, TU 14-136-367-2008 |
| Sheets and stripes |
В23 |
GOST 14918-80, GOST 103-2006 |
| Pipes steel and connecting parts to them |
В62 |
GOST 3262-75, GOST 20295-85, GOST 24950-81, TU 14-3-1428-86 |
| Tapes |
В24 |
GOST 3560-73 |
| Steel wire medium- and high-carbon |
В72 |
GOST 3920-70, GOST 7372-79, GOST 9389-75, GOST 9850-72, GOST 26366-84 |
| Sectional and shaped rolling |
В22 |
GOST 8319.0-75, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006 |
| Bulls. Blanks. Slabs |
В31 |
OST 3-1686-90, TU 14-1-4944-90 |
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
HRC |
| Rolled sheet. Annealing 850 °C (the speed of induction heating 30 °C/s) cooling water shower + Vacation at 180 °C (delay of 1,5 hours) |
| ≤6 |
1900-2100 |
2100-2300 |
3-5 |
25-30 |
196-392 |
58-69 |
| Bars hot rolled on the other 14-1-1926-76. Normalization at 840-860 °C, air cooling |
|
≥314 |
≥598 |
≥12 |
≥28 |
- |
- |
| Rolled steel. Normalization at 850 °C |
| ≤130 |
≥300 |
≥600 |
≥10 |
≥25 |
≥343 |
≥22 |
| Steel, hot-rolled, forged, calibrated and silverfish 2nd category. Normalization at 850 °C |
| ≤25 |
≥315 |
≥600 |
≥12 |
≥28 |
- |
- |
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 |
| HRC |
Rockwell hardness (indenter diamond spheroconical) |
Technological properties
| Name |
The value |
| Weldability |
Not priymayutsya for welded structures. |
| Propensity to temper brittleness |
Tend not. |
| Forging temperature |
Start - 1265 °C, the end - 1080 °C. |
| Flock-sensitive sensitivity |
not sensitive. |
| Microstructure |
Rentals on the other 14-1-1926-76 comes with a normalized value of the austenite grain, which size should be not larger than 5 numbers according to GOST 5639. |
