Steel 15kp
Description
Steel 15kp
Steel 15kp: brand of steels and alloys. Below is a systematized information about the purpose, chemical composition, types of supplies, substitutes, temperature of critical points, physical, mechanical, technological and casting properties for the grade — Steel 15kp.
General information of steel 15kp
| Substitute brand |
| steel: 10kp, 20kp |
| Delivery type |
| Long products, including shaped: GOST 2590−71, GOST 2591−71, GOST 2879−69, GOST 19771−74, GOST 8278−83, GOST 10772−74, GOST 8281−80, GOST 8282−83, GOST 18283 -77, GOST 10702−78. Calibrated bar GOST 7417−75, GOST 8559−75, GOST 8560−78, GOST 10702−78. Polished rod and silverware GOST 14955−77. Thick sheet GOST 19903−74, GOST 4041−71, GOST 1577−81. Thin sheet GOST 19903−74, GOST 16523−70, GOST 19904−74. Tape GOST 10234−77, GOST 1530−78. Strip GOST 82−70, GOST 103−76, GOST 1577−81. Wire GOST 17305−71, GOST 2771−81, GOST 5663−79. Pipes GOST 10704−91, GOST 10705−80. |
| Application |
| Elements of pipe connections, fittings, plugs and other details of boiler and turbine construction, operating at temperatures from -40 to 425 ° С; after carburizing and cyanidation — parts that require high surface hardness and low core strength (fasteners, axles, levers, etc. parts). |
Chemical composition of steel 15kp
| Chemical element |
% |
| Silicon (Si), no more |
0.07 |
| Manganese (Mn) |
0.25−0.50 |
| 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) |
0.12−0.19 |
| Phosphorus (P), no more |
0.035 |
| Chromium (Cr), no more |
0.25 |
Mechanical properties of steel 15kp
Mechanical properties of rolled products
| Heat treatment, delivery condition |
σ B, MPa |
δ 5 ,% |
δ 4 ,% |
ψ,% |
HB |
| Calibrated and calibrated steel with special finishing after annealing or tempering |
365−470 |
|
|
55 |
149 |
| Steel calibrated and calibrated with a special finish, work-hardened without heat treatment |
390 |
8 |
|
50 |
187 |
| Normalized and hot rolled sheets |
345 |
thirty |
|
|
|
| Normalized or hot rolled strips |
355 |
29 |
|
55 |
|
| Hot rolled sheets |
315−440 |
|
23 |
|
|
| Cold rolled sheets |
315−440 |
|
|
|
|
| Heat-treated sheets of the 1st-2nd category |
325−440 |
thirty |
|
|
121 |
Technological properties of steel 15kp
| Forging temperature |
| Beginning 1300, end 700. Air cooling. |
| Weldability |
| Can be welded without restrictions. Welding methods: RDS, ADS submerged arc and gas shielded, KTS. |
| Machinability by cutting |
| In the hot-rolled state at HB 143 K υ tv.spl. = 1.8. |
| Tendency to release ability |
| not inclined |
| Flock sensitivity |
| not sensitive |
Temperature of critical points of steel 15kp
| Critical point |
° C |
| Ac1 |
735 |
| Ac3 |
863 |
| Ar3 |
840 |
| Ar1 |
685 |
Impact strength of steel 15kp
Impact strength, KCU, J / cm 2
| Delivery status, heat treatment |
+20 |
-20 |
-thirty |
-40 |
-50 |
| After normalization |
274 |
108 |
59 |
34 |
20 |
Physical properties of steel 15kp
| Test temperature, ° С |
20 |
100 |
200 |
300 |
400 |
500 |
600 |
700 |
800 |
900 |
| Normal elastic modulus, E, GPa |
201 |
192 |
185 |
172 |
156 |
|
|
|
|
|
| Torsional shear elastic modulus G, GPa |
83 |
80 |
77 |
74 |
71 |
68 |
63 |
|
|
|
| Density of steel, pn, kg / m 3 |
7850 |
7828 |
7794 |
7759 |
7724 |
7687 |
7648 |
7611 |
7599 |
7584 |
| Thermal conductivity coefficient W / (m ° С) |
|
53 |
53 |
49 |
46 |
43 |
39 |
36 |
32 |
thirty |
| Ud. electrical resistance (p, Nom. m) |
|
233 |
296 |
387 |
487 |
607 |
753 |
904 |
1092 |
1140 |
| 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 |
14.4 |
14.8 |
15.1 |
15.3 |
14.1 |
13.2 |
13.3 |
| Specific heat (C, J / (kg ° C)) |
465 |
486 |
515 |
532 |
565 |
586 |
620 |
691 |
708 |
|
