Steel 50
Steel 38 (38-PV)
Steel 20-KS
20-KHS steel
20K steel
Steel 20kp
20ps steel
20YuA steel
20YUCH steel (20YUCH)
Steel 22ZhR
22K Steel
Steel 25
Steel 25ps
Steel 30
Steel 35
Steel 20 (20A; 20B)
Steel 40 (40A)
Steel 43 (43-PV)
Steel 45
Steel 45T (45ST)
Steel 50
Steel 54 (54pp)
Steel 55
Steel 58 (55pp)
Steel 60
Steel 60pp (60pp-PV)
Steel 90 (BP5)
Steel D
Steel DB
E55 steel (NIPRA)
Steel 11kp
Steel 0501
Steel 05kp
Steel 08
Steel 08kp
08ps steel
Steel 08Fkp
Steel 08U (08UA; 08U2 (08U2A))
08YUP steel
08YuPR steel
Steel 10
10kp steel
10ps steel
10YuA (10Yu) steel
18YuA steel
Steel 11MTUA
11YuA steel
12K Steel
Steel 15 (15A)
15K Steel
Steel 15kp
15ps steel
15FSA steel
15YuA steel
16GNMA steel
16K Steel
18K Steel
18kp steel
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 50 |
| Designation GOST Latin | 50 |
| Transliteration | 50 |
| The chemical elements | 50 |
Description
50 steel is used: after normalization with the release or quenching a vacation — for the manufacture of gear wheels, rolling shafts, rods, heavy-duty axles, tires, light duty springs and leaf springs, coulters, finger track links, couplings gear boxes, housings of the injectors and other parts operating friction; cold-rolled heat-treated ribbon with a thickness of 0.05 to 1.30 mm for the manufacture of spring details and springs, with the exception of the winding; tinned wire for the manufacture of tires rotors of electric machines; remisol heat-treated tin-plated wire, designed for the manufacture of galev to reminyl devices of textile machines; forging rolls for hot and cold rolling of metals without mechanical processing.
Note
The degree of deoxidation — SP.
Standards
| Name | Code | Standards |
|---|---|---|
| Sectional and shaped rolling | В32 | GOST 1050-88, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 10702-78, GOST 14955-77, GOST В 5160-89, GOST 1050-2013, TU 14-1-5414-2001, TU 14-1-2118-77, TU 14-1-2884-80, TU 14-11-245-88, TU 14-1-5480-2004, TU 0950-295-00187211-2000, TU 14-1-2252-2007, TU 14-1-1271-75, TU 14-1-5228-93, TU 14-136-367-2008 |
| Armature, units and details of rolling stock of railways | Д55 | GOST 11530-93 |
| Sheets and stripes | В33 | GOST 1577-93, TU 14-1-4516-88, TU 14-1-4561-88 |
| Tapes | В34 | GOST 2284-79, GOST 10234-77, GOST 21996-76, TU 14-4-1011-79, TU 14-4-105-72, TU 14-4-860-77 |
| 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 9124-85, GOST 9161-85, GOST 9389-75, GOST 9850-72, GOST 17305-91, GOST 26366-84 |
| Machines and equipment for metallurgical and foundry industry | Г44 | GOST 5399-69 |
| Sectional and shaped rolling | В22 | GOST 5422-73, GOST 8239-89, GOST 8240-97, GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 8319.0-75, GOST 8509-93, GOST 8510-86, GOST 9234-74, GOST 11474-76, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006, OST 5.9087-84 |
| Sheets and stripes | В23 | GOST 82-70, GOST 14918-80, GOST 16523-97, GOST 19903-74, GOST 16523-89, GOST 16523-70, GOST 103-2006, GOST 19903-90, TU 14-1-486-73, TU 14-1-1934-76 |
| Metal forming. Forgings | В03 | GOST 8479-70, TU 108-11-905-87, ST ЦКБА 010-2004 |
| Bulls. Blanks. Slabs | В31 | OST 3-1686-90, TU 14-1-4944-90 |
Mechanical characteristics
| Section, mm | t отпуска, °C | sT|s0,2, MPa | σB, MPa | d5, % | d4 | d | y, % | kJ/m2, кДж/м2 | Brinell hardness number, MPa | HV, MPa |
|---|---|---|---|---|---|---|---|---|---|---|
| Tape flatted average strength of 0.1-4.0 mm according to GOST 10234-77 in the state of delivery (indicated delivery) | ||||||||||
| - | - | - | 780-1130 | - | - | - | - | - | - | - |
| - | - | - | 830-980 | - | - | - | - | - | - | - |
| - | - | - | 980-1130 | - | - | - | - | - | - | - |
| - | - | - | ≤740 | - | - | ≥10 | - | - | - | - |
| - | - | - | ≤520 | - | - | - | - | - | - | - |
| Cold-rolled steel strip of 0.1-4.0 mm in the delivery state according to GOST 2284-79 | ||||||||||
| - | - | - | 740-1080 | - | - | - | - | - | - | - |
| - | - | - | 440-740 | - | ≥13 | - | - | - | - | - |
| - | - | - | 440-610 | - | ≥13 | - | - | - | - | - |
| Steel, hot-rolled, forged, calibrated and silverfish 2nd category after normalization | ||||||||||
| ≤25 | - | - | ≥630 | ≥14 | - | - | ≥40 | - | - | - |
| Steel grooved 5-th category | ||||||||||
| - | - | - | ≥660 | ≥6 | - | - | ≥30 | - | - | - |
| - | - | - | ≥560 | ≥12 | - | - | ≥40 | - | - | - |
| Forgings. Normalization | ||||||||||
| 100-300 | - | ≥275 | ≥530 | ≥17 | - | - | ≥38 | ≥334 | 156-197 | - |
| 100 | - | ≥315 | ≥570 | ≥17 | - | - | ≥38 | ≥383 | 167-207 | - |
| Hot-rolled sheet in the delivery condition. Group strength К490В | ||||||||||
| ≤2 | - | - | 490-720 | - | ≥12 | - | - | - | - | - |
| 2-3.9 | - | - | 490-720 | - | ≥13 | - | - | - | - | - |
| Cold-rolled sheet in the delivery condition. Group strength К490В | ||||||||||
| ≤2 | - | - | 490-720 | - | ≥13 | - | - | - | - | - |
| 2-3.9 | - | - | 490-720 | - | ≥14 | - | - | - | - | - |
| Tape cold-rolled heat-treated (0,05-1,30 mm) for spring parts and springs according to GOST 21996-76 (listed group strength tape) | ||||||||||
| - | - | - | 1270-1570 | - | - | - | - | - | - | 375-485 |
| - | - | - | 1580-1860 | - | - | - | - | - | - | 486-600 |
| - | - | - | ≥1860 | - | - | - | - | - | - | ≥600 |
| Forgings. Hardening in water from 850 °C + Vacation at 580-600 °C, air cooling | ||||||||||
| ≤50 | - | ≥530 | ≥760 | ≥15 | - | - | ≥50 | ≥579 | - | - |
| 120-160 | - | ≥450 | ≥740 | ≥13 | - | - | ≥40 | ≥383 | - | - |
| 160-200 | - | ≥430 | ≥720 | ≥13 | - | - | ≥35 | ≥196 | - | - |
| 50-120 | - | ≥470 | ≥740 | ≥13 | - | - | ≥40 | ≥383 | - | - |
| Forgings. Normalization at 830-860 °C, air cooling + Vacation at 580-650 °C air cooling or furnace | ||||||||||
| 101-200 | - | ≥305 | ≥610 | ≥16 | - | - | ≥38 | ≥334 | - | - |
| 201-300 | - | ≥305 | ≥610 | ≥14 | - | - | ≥33 | ≥285 | - | - |
| 301-500 | - | ≥295 | ≥590 | ≥12 | - | - | ≥30 | ≥245 | - | - |
| 501-800 | - | ≥285 | ≥570 | ≥12 | - | - | ≥28 | ≥196 | - | - |
| Steel heat-treated, hot-rolled and hot-rolled with special surface finishing calibrated and calibrated with special surface finish | ||||||||||
| - | - | - | - | - | - | - | - | - | ≤217 | - |
| Sheet autogeny or vysokoopasnye | ||||||||||
| ≤80 | - | - | ≥580 | ≥17 | - | - | - | - | - | - |
| Workpiece diameter of 40 mm. Quenching in water 840 °C | ||||||||||
| - | 400 | ≥600 | ≥830 | ≥14 | - | - | ≥50 | ≥628 | ≥240 | - |
| - | 500 | ≥530 | ≥760 | ≥15 | - | - | ≥56 | ≥863 | ≥215 | - |
| - | 600 | ≥450 | ≥680 | ≥17 | - | - | ≥64 | ≥1364 | ≥190 | - |
| Workpiece diameter 60 mm. Quenching in water 840 °C | ||||||||||
| - | 400 | ≥550 | ≥770 | ≥14 | - | - | ≥48 | ≥549 | ≥217 | - |
| - | 500 | ≥490 | ≥710 | ≥15 | - | - | ≥55 | ≥687 | ≥200 | - |
| - | 600 | ≥420 | ≥630 | ≥19 | - | - | ≥63 | ≥1060 | ≥180 | - |
| A sample with diameter 10 mm, length 50 mm, deformed. The rate of deformation of 5 mm/min strain Rate of 0.002 1/s | ||||||||||
| - | - | ≥87 | ≥115 | ≥39 | - | - | ≥97 | - | - | - |
| - | - | ≥45 | ≥81 | ≥45 | - | - | ≥100 | - | - | - |
| - | - | ≥16 | ≥50 | ≥43 | - | - | ≥100 | - | - | - |
| - | - | ≥11 | ≥36 | ≥35 | - | - | ≥100 | - | - | - |
| - | - | ≥8 | ≥28 | ≥41 | - | - | ≥100 | - | - | - |
| - | - | ≥8 | ≥22 | ≥49 | - | - | ≥100 | - | - | - |
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 |
| d4 | Elongation after rupture |
| d | Elongation after rupture |
| y | The relative narrowing |
| kJ/m2 | Toughness |
| HV | The Vickers hardness |
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 | 216 | 88 | 7810 | 48 | 272 | - | - |
| 20 | 216 | - | 7810 | 48 | 272 | - | - |
| 100 | 213 | 87 | - | 48 | - | 112 | 487 |
| 200 | 207 | 84 | - | 47 | - | 12 | 500 |
| 300 | 200 | 81 | - | 44 | - | 128 | 517 |
| 400 | 180 | 71 | - | 41 | - | 134 | 533 |
| 500 | 171 | 67 | - | 38 | - | 139 | 559 |
| 600 | 154 | 61 | - | 35 | - | 142 | 559 |
| 700 | 136 | 54 | - | 31 | - | 145 | - |
| 800 | 123 | 49 | - | 27 | - | 145 | 584 |
| 1000 | - | - | - | - | - | 134 | - |
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 |
| a | The coefficient of linear expansion |
| С | Specific heat |
Technological properties
| Name | The value |
|---|---|
| Weldability | Difficult weldability. The welding methods of the RDS and CBS. Recommended heating and subsequent heat treatment. |
| Propensity to temper brittleness | tend not |
| Forging temperature | Start - 1250 °C, the end - of 800 °C. the cross Sections up to 400 mm are cooled in air. |
| Flock-sensitive sensitivity | insensitive |
| Workability by cutting | In the hot rolled condition when blower SB 270 and HB=630 MPa Kn TV.SPL.=0.85 Kn b.St.=0.80 |
