Designation
| Name |
The value |
| Designation GOST Cyrillic |
25Г2С |
| Designation GOST Latin |
25G2C |
| Transliteration |
25G2S |
| By chemical elements |
25Mn2С |
Description
Steel 25G2S is used: for the manufacture of reinforcement steel classes At600, At600c, At600k, At800, designed for conventional reinforcement and prestressed concrete structures.
Standards
| Name |
Code |
Standards |
| Bars and shapes |
В22 |
GOST 5781-82, GOST 10884-94, GOST 2590-2006, TU 14-2-949-91, TU 14-1-5254-94 |
| Bars and shapes |
В32 |
TU 14-11-245-88 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
As |
| GOST 5781-82 |
0.2-0.29 |
≤0.045 |
≤0.04 |
1.2-1.6 |
≤0.3 |
0.6-0.9 |
≤0.3 |
Rest |
≤0.3 |
- |
| GOST 10884-94 |
0.2-0.29 |
≤0.045 |
≤0.04 |
1.2-1.6 |
≤0.3 |
0.6-0.9 |
≤0.3 |
Rest |
≤0.3 |
≤0.08 |
Fe is the basis.
According to GOST 5781-82 and GOST 10884-94, the admixture of Ti (titanium) is allowed from the calculation of its mass fraction in the finished rolled product 0.01-0.03%.
According to GOST 10884-94 in steel, intended for the production of reinforcing steel classes AT600, AT600C, At600K and At800, it is possible to increase the mass fraction of sulfur and phosphorus to 0.045%.
Mechanical properties
| Section, mm |
t отпуска, °C |
sT|s0,2, MPa |
σU, MPa |
d5, % |
| Reinforcing steel in the delivery state according to GOST 10884-94 (the Holy column of the delivery condition specified strength grade and temperature of electrical heating) |
| 10-40 |
- |
≥600 |
≥800 |
≥12 |
| Rod hot-rolled |
| 16 |
- |
420-430 |
660-690 |
23-28 |
| Rod rebar section 14-16 mm. Quenching in water from 900 °C + Vacation |
| - |
150 |
≥1220 |
≥1310 |
≥8 |
| Reinforcing steel in the delivery state according to GOST 10884-94 (the Holy column of the delivery condition specified strength grade and temperature of electrical heating) |
| 10-32 |
- |
≥800 |
≥1000 |
≥8 |
| Rod hot-rolled |
| 25 |
- |
380-400 |
590-620 |
23-31 |
| Rod rebar section 14-16 mm. Quenching in water from 900 °C + Vacation |
| - |
300 |
≥1100 |
≥1210 |
≥6 |
| Rod hot-rolled |
| 40 |
- |
420-435 |
660-680 |
25-29 |
| Rod rebar section 14-16 mm. Quenching in water from 900 °C + Vacation |
| - |
400 |
≥960 |
≥1060 |
≥9 |
| Rod, cold-formed |
| ≤16 |
- |
580-660 |
640-730 |
15-18 |
| Rod rebar section 14-16 mm. Quenching in water from 900 °C + Vacation |
| - |
500 |
≥830 |
≥910 |
≥14 |
| Rod, cold-formed |
| 16-32 |
- |
≥785 |
≥980 |
≥7 |
| Rod rebar section 14-16 mm. Quenching in water from 900 °C + Vacation |
| - |
600 |
≥690 |
≥740 |
≥17 |
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 |
Technological properties
| Name |
The value |
| Weldability |
Welded without any restrictions. |
| Склонность к отпускной хрупкости |
Tend not. |
| The temperature of forging |
Start - 1200 °C, the end - 850 °C. |
| Flock-sensitive sensitivity |
not sensitive. |
