Steel 85
Description
Steel 85
Steel 85: a brand of steels and alloys. Below is a systematized information on the purpose, chemical composition, types of supplies, substitutes, temperature of critical points, physical, mechanical, technological and casting properties for the grade — Steel 85.
General steel 85
| Substitute brand |
| steel: 70, 75, 80. |
| Delivery type |
| Sections, including shaped: GOST 14959−79, GOST 2590−71, GOST 2591−71, GOST 2879−69, GOST 7419.0−78, GOST 7419.1−78, GOST 7419.3−78, GOST 7419.5−78 — GOST 7419.8 -78. Calibrated bar GOST 7417−75, GOST 8559−75, GOST 8560−78. Polished bar and silver bar GOST 14955−77, GOST 7419.0−78, GOST 7419.1−78, GOST 7419.3−78, GOST 7419.5−78 — GOST 7419.8−78. Tape GOST 2283−79. Strip GOST 103−76, 4405−75, GOST 82−70, GOST 7419.2−78, GOST 7419.4−78. Forgings and forged billets GOST 1133−71. |
| Application |
| springs, friction discs and other parts that require high strength and elasticity and wear resistance. |
Chemical composition of steel 85
| Chemical element |
% |
| Silicon (Si) |
0.17−0.37 |
| Manganese (Mn) |
0.50−0.80 |
| Copper (Cu), no more |
0.20 |
| Nickel (Ni), no more |
0.25 |
| Sulfur (S), no more |
0.035 |
| Carbon (C) |
0.82−0.90 |
| Phosphorus (P), no more |
0.035 |
| Chromium (Cr), no more |
0.25 |
Mechanical properties of steel 85
Mechanical properties
| Heat treatment, delivery condition |
Section, mm |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
HRC e |
| Steel categories: 3.3A, 3B, 3V, 3G, 4.4A, 4B. Hardening 820 ° С, oil, tempering 470 ° С. |
|
980 |
1130 |
8 |
thirty |
|
| Wire. Hardening 920 ° С, cooling in oil at 40 ° С, holding for 1 min. Vacation 500 ° С, exposure 15 min. |
6.5 |
|
1540 |
five |
42 |
|
| Hardening 1000 ° C, water. Hardening 870 ° C, water. Vacation 250 ° C. |
1.0 |
1650 |
1750 |
nine |
|
> 47 |
Technological properties of steel 85
| Forging temperature |
| Beginning 1180, end 800. Sections up to 220 mm are cooled in wells. |
| Weldability |
| not applicable for welded structures. |
| Tendency to release ability |
| not inclined |
| Flock sensitivity |
| insensitive |
Temperature of critical points of steel 85
| Critical point |
° C |
| Ac1 |
720 |
| Ac3 |
730 |
| Ar1 |
700 |
Physical properties of steel 85
| Test temperature, ° С |
20 |
100 |
200 |
300 |
400 |
500 |
600 |
700 |
800 |
900 |
| Normal elastic modulus, E, GPa |
191 |
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| Torsional shear elastic modulus G, GPa |
76 |
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