Boiler steel. History and interesting.
Are you interested in the history and properties of the boiler house? The supplier Avlob offers to buy a boiler steel at a bargain price. The supplier guarantees the timely delivery of products to any address in Europe or abroad. Regular customers receive a discount discount. The price is the best in this segment.
Technical specifications
Advantages of boiler equipment:
- High strength, especially from bursting loads created by steam and high-temperature liquids;
- Heat resistance — the ability not to reduce the level of allowable stresses at high temperatures;
- Resistance to scale formation;
- Stability of the initial structure.
Thermomechanical stability is particularly important for boiler steels, since at elevated temperatures, in many iron-carbon alloys, spheroidization occurs-the decomposition of iron carbide plates into separate parts having a spherical shape. Spheroidization significantly reduces heat resistance. This fact is especially important for unalloyed boiler steels, which have pearlite structure. The maximum heat resistance has austenitic boiler steel.
Chemical composition of boiler steels
Domestic marks of boiler steels are produced in accordance with the requirements of GOST 5520−79 .
- 15К, 16К, 18К, 20К, 22К — carbon;
- 09G2S, 16GS, 10G2S1; 17GS, 17G1S, 14HGS — low-alloyed;
- 12ХМ, 10Х2М, 12Х1МФ — alloyed.
The supplier Avlob offers to buy a boiler steel at a bargain price. The price is the best in this segment of rental.
| steel grade | Mac% of elements,% | |||||||
| Carbon | Silicon | Manganese | Sulfur | Phosphorus | Chromium | Nickel | Molybdenum | |
| no more | ||||||||
| 15K | 0.12−0.20 | 0.15−0.30 | 0.35−0.65 | 0.040 | 0.040 | - | - | - |
| 16K | 0.12−0.20 | 0.17−0.37 | 0.45−0.75 | 0.040 | 0.040 | - | - | - |
| 18K | 0.14−0.22 | 0.17−0.37 | 0.55−0.85 | 0.040 | 0.040 | - | - | - |
| 20K | 0.16−0.24 | 0.15−0.30 | 0.35−0.65 | 0.040 | 0.040 | - | - | - |
| 22K | 0.19−0.26 | 0.17−0.40 | 0.7−1.0 | 0.035 | 0.040 | - | - | - |
| 12ХМ | ≤0.16 | 0.17−0.37 | 0.4−0.7 | 0.025 | 0.025 | 0.8−1.10 | ≤0.30 | 0.40−0.55 |
| 10X2M | 0.08−0.12 | 0.17−0.37 | 0.4−0.7 | 0.020 | 0.020 | 2.0−2.5 | ≤0.30 | 0.60−0.80 |
| 12Х1МФ * | 0.08−0.15 | 0.17−0.37 | 0.4−0.7 | 0.025 | 0.025 | 0.9−1.2 | ≤0.30 | 0.25−0.35 |
| 09G2S | ≤0.12 | 0.5−0.8 | 1.3−1.7 | 0.040 | 0.035 | - | - | - |
| 16GS | 0.12−0.18 | 0.4−0.7 | 0.9−1.2 | 0.040 | 0.035 | - | - | - |
| 10Г2С1 | ≤0.12 | 0.8−1.1 | 1.3−1.65 | 0.040 | 0.035 | - | - | - |
| 17GS | 0.14−0.20 | 0.4−0.6 | 1.0−1.4 | 0.040 | 0.035 | - | - | - |
| 17Г1С | 0.15−0.20 | 0.4−0.6 | 1.15−1.6 | 0.040 | 0.035 | - | - | - |
| 14HGS | 0.11−0.16 | 0.4−0.7 | 0.9−1.3 | 0.040 | 0.035 | 0.5−0.8 | - | - |
| _________________ * Mass fraction of vanadium is 0.15% -0.30%. | ||||||||
At the request of the consumer in carbonaceous and low-alloy steels, the mass fraction of sulfur should not exceed 0.025; 0.030 or 0.035%; phosphorus — 0.030 or 0.035%.
In sheets of grades 15K and 20K thicker than 20 mm is allowed up to 0.8% Mn.
The content of chromium, nickel and copper in carbonaceous and low-alloyed steel should not exceed 0.30% of each. At the request of the consumer in the sum of them should be up to 0,6%.
The content of copper in alloy steels should be up to 0.2%, and in the manufacture of scrap-process — up to 0.30%.
In low-alloy steels, aluminum is allowed to add up to 0.05% and titanium 0.03%.
Mass fraction of aluminum in alloy steels ≤0,02%.
The mass fraction of arsenic in carbonaceous and low-alloy steels is up to 0.08%. When smelting steel from the Kerch ores, the percentage of arsenic is allowed to be ≤0.15%, and the percentage of phosphorus ≤0.030%.
1.7. The percentage of residual nitrogen in carbonaceous and low-alloyed steel is ≤0.008%, and when smelting in electric furnaces ≤0.012%.
Delivery, price
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