Steel 10 (st 10)
Description
Steel 10 (st 10)
Steel 10 (article 10): 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 10 (Art 10).
General information steel 10 (st 10)
| Substitute brand |
| steel: 08, 15, 08kp |
| Delivery type |
| Circle 10, sheet 10, long products, including shaped: GOST 1050−74, GOST 2590−71, GOST 2591−71, GOST 2879−69, GOST 8509−86, GOST 8510−86, GOST 8240−72, GOST 8239−72. Calibrated bar GOST 10702−78, GOST 7417−75, GOST 8559−75, GOST 8560−78. Polished bar and silver bar GOST 10702−78, GOST 14955−77. Thick sheet GOST 1577−81, GOST 19903−74. Thin sheet GOST 16523−70. Tape GOST 6009−74, GOST 10234−77. Strip GOST 1577−81, GOST 103−76, GOST 82−70. Wire GOST 17305−71, GOST 5663−79. Pipes GOST 8731−87, GOST 8732−78, GOST 8733−87, GOST 8734−74, GOST 10705−80, GOST 10704−91, GOST 1060−83, GOST 5654−86, GOST 550−75. |
| Application |
| Parts operating at temperatures from -40 to 450 ° C, which are subject to high plasticity requirements, after chemical-thermal treatment — parts with high surface hardness and low core strength. |
Chemical composition of steel 10 (st 10)
| Chemical element |
% |
| Silicon (Si) |
0.17−0.37 |
| Manganese (Mn) |
0.35−0.65 |
| Copper (Cu), no more |
0.25 |
| Arsenic (As), no more |
0.08 |
| Nickel (Ni), no more |
0.25 |
| Sulfur (S), no more |
0.04 |
| Carbon (C) |
0.07−0.14 |
| Phosphorus (P), no more |
0.035 |
| Chromium (Cr), no more |
0.15 |
Mechanical properties of steel 10 (st 10)
| Heat treatment, delivery condition |
σ B, MPa |
δ 5 ,% |
δ 4 ,% |
ψ,% |
HB |
HRC e |
| Hot-rolled steel, forged calibrated and silver grade 2 after normalization |
335 |
31 |
|
55 |
|
|
| Calibrated and calibrated steel with special finishing: after annealing or tempering |
335−450 |
|
|
55 |
143 |
|
| Steel calibrated and calibrated with special finishing: after spheroidizing annealing |
315−410 |
|
|
55 |
143 |
|
| Calibrated and calibrated steel with special finishing: work-hardened without heat treatment |
390 |
8 |
|
50 |
187 |
|
| Normalized or hot rolled strips |
335 |
31 |
|
55 |
|
|
| Hot rolled sheet |
295−410 |
|
24 |
|
|
|
| Cold rolled sheet |
295−410 |
|
25 |
|
|
|
| Heat-treated sheet of the 1st-2nd category |
295−420 |
32 |
|
|
117 |
|
| Hot-deformed heat-treated pipes |
355 |
24 |
|
|
137 |
|
| Cold and heat-deformed heat-treated pipes |
345 |
24 |
|
|
137 |
|
| Cementation 920−950 ° C. Hardening 790−810 ° С, water. Vacation 180−200 ° C, air. |
390 |
25 |
|
55 |
137 |
57−63 |
Mechanical properties at elevated temperatures
| test t, ° C |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
KCU, J / m 2 |
| 20 |
260 |
420 |
32 |
69 |
221 |
| 200 |
220 |
485 |
20 |
55 |
176 |
| 300 |
175 |
515 |
23 |
55 |
142 |
| 400 |
170 |
355 |
24 |
70 |
98 |
| 500 |
160 |
255 |
19 |
63 |
78 |
Technological properties of steel 10 (st 10)
| Forging temperature |
| Beginning 1300, end 700. Air cooling. |
| Weldability |
| It can be welded without restrictions, except for parts after chemical-heat treatment; welding methods: RDS, ADS submerged arc and gas shielded, KTS. |
| Machinability by cutting |
| In the hot-rolled state at HB 99−107 and σ B = 450 MPa, K υ tv.spl. = 2,1, K υ b.st. = 1.6. |
| Tendency to release ability |
| Not inclined. |
| Flock sensitivity |
| Not sensitive. |
Temperature of critical points of steel 10 (st 10)
| Critical point |
° C |
| Ac1 |
732 |
| Ac3 |
870 |
| Ar3 |
854 |
| Ar1 |
680 |
Impact strength of steel 10 (st 10)
Impact strength, KCU, J / cm 2
| Delivery status, heat treatment |
+20 |
-20 |
-thirty |
-40 |
-50 |
-60 |
| Proctok with a diameter of 35 mm. |
235 |
196 |
|
157 |
|
78 |
| Proctok with a diameter of 35 mm. Normalization |
73−265 |
|
203−216 |
|
179 |
|
| Proctok with a diameter of 35 mm. Annealing |
59−245 |
49−174 |
|
45−83 |
|
19−42 |
Endurance limit steel 10 (st 10)
| σ -1, MPa |
τ -1, MPa |
n |
Heat treatment, steel condition |
| 157−216 |
51 |
1E + 6 |
Normalization 900−920 C. |
Hardenability of steel 10 (st 10)
Hardness for strips of calcination, HRCэ
| Distance from the end, mm / HRC e |
| 1.5 |
3 |
4.5 |
6 |
| 31 |
29 |
26 |
20.5 |
Physical properties of steel 10 (st 10)
| Test temperature, ° С |
20 |
100 |
200 |
300 |
400 |
500 |
600 |
700 |
800 |
900 |
| Normal elastic modulus, E, GPa |
206 |
199 |
195 |
186 |
178 |
169 |
157 |
|
|
|
| Torsional shear elastic modulus G, GPa |
78 |
77 |
76 |
73 |
69 |
66 |
59 |
|
|
|
| Density of steel, pn, kg / m 3 |
7856 |
7832 |
7800 |
7765 |
7730 |
7692 |
7653 |
7613 |
7582 |
7594 |
| Thermal conductivity coefficient W / (m ° С) |
|
58 |
54 |
49 |
45 |
40 |
36 |
32 |
29 |
27 |
| Ud. electrical resistance (p, Nom. m) |
|
190 |
263 |
352 |
458 |
584 |
734 |
905 |
1081 |
1130 |
| Test temperature, ° С |
20−100 |
20−200 |
20−300 |
20−400 |
20−500 |
20−600 |
20−700 |
20−800 |
20−900 |
20−1000 |
| Linear expansion coefficient (a, 10−6 1 / ° С) |
12.4 |
13.2 |
13.9 |
14.5 |
14.9 |
15.1 |
15.3 |
12.1 |
14.8 |
12.6 |
| Specific heat (C, J / (kg ° C)) |
466 |
479 |
|
512 |
|
567 |
|
|
|
|
