Steel G9
Designation
| Name |
The value |
| Designation GOST Cyrillic |
Р9 |
| Designation GOST Latin |
P9 |
| Transliteration |
R9 |
| The chemical elements |
- |
Description
P9 steel is used: for the manufacture of tools of simple shape without requiring a large volume grinding; tool handle common construction materials; springs and measuring tapes; Hach saws.
Standards
| Name |
Code |
Standards |
| Sectional and shaped rolling |
В22 |
GOST 1133-71, GOST 2590-2006, GOST 2591-2006 |
| Tapes |
В34 |
GOST 2283-79, GOST 23522-79 |
| Sheets and stripes |
В33 |
GOST 4405-75, TU 14-1-1408-75, TU 14-1-3508-82 |
| Sectional and shaped rolling |
В32 |
GOST 7417-75, GOST 14955-77, GOST 19265-73, TU 14-11-245-88 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
V |
Mo |
W |
Co |
| GOST 19265-73 |
0.85-0.95 |
≤0.03 |
≤0.03 |
≤0.5 |
3.8-4.4 |
≤0.5 |
≤0.4 |
The rest |
2.3-2.7 |
≤1 |
8.5-9.5 |
≤0.5 |
Fe is the basis.
The chemical composition is given in accordance with GOST 19265-73 in the edition of 1986. In GOST 19265-73 edition of 2003 information about this brand was not available.
Mechanical characteristics
| Section, mm |
t отпуска, °C |
σB, MPa |
HRB |
| Cold-rolled steel strip for Hach saws 0.65 mm in the delivery state according to GOST 23522-79 |
|
- |
≤880 |
100 |
| Rolled steel. Quenching in oil from 1230 °C to + Leave three times for 1 h |
| - |
200 |
≥1030 |
- |
| Cold-rolled steel strip otoshiana common quality of 0.1-4.0 mm according to GOST 2283-79 on delivery |
|
- |
≤880 |
- |
| Rolled steel. Quenching in oil from 1230 °C to + Leave three times for 1 h |
| - |
300 |
≥1080 |
- |
| - |
400 |
≥1270 |
- |
| - |
500 |
≥1470 |
- |
| - |
600 |
≥1960 |
- |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| σB |
Limit short-term strength |
| HRB |
Rockwell hardness (indenter steel, spherical) |
Physical characteristics
| Temperature |
Е, ГПа |
G, ГПа |
r, кг/м3 |
l, Вт/(м · °С) |
R, НОм · м |
| 20 |
220 |
83 |
8300 |
- |
380 |
| 100 |
- |
- |
- |
23 |
417 |
| 200 |
- |
- |
- |
25 |
505 |
| 300 |
- |
- |
- |
26 |
600 |
| 400 |
- |
- |
- |
28 |
695 |
| 500 |
- |
- |
- |
30 |
790 |
| 600 |
- |
- |
- |
31 |
900 |
| 700 |
- |
- |
- |
- |
1020 |
| 800 |
- |
- |
- |
- |
1160 |
| 900 |
- |
- |
- |
- |
1170 |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| G |
Modulus of elasticity shear torsion |
| l |
Coefficient of thermal conductivity |
Technological properties
| Name |
The value |
| Weldability |
When butt welding with steel 45 and 40CR good. |
| Forging temperature |
Start - 1200 °C, the end of - 900 °C. Cooling in the wells ranging from 750-800 °C. |
| Workability by cutting |
When HB 205-255 Kn TV.SPL.=0.8 Kn b.St.=0,6. |
| Features of heat treatment |
Prone to overheating during hardening. |
| Grindability |
Reduced. |
| Viscosity |
Good toughness and wear resistance. |
