Boiler steel. History and Interesting.
Are you interested in interesting information and the history of boiler steel? Supplier Evek GmbH offers to buy boiler steel in any quantity at an affordable price in a wide range. We provide delivery of products to any point on the continent. The price is optimal.
Technical characteristics
Based on the operating conditions of boiler equipment, the main characteristics of steels of this group include:
- High strength, especially against the bursting loads created by steam and liquids heated to high temperatures;
- Heat resistance - the ability not to reduce the level of allowable stresses at high temperatures;
- Resistance to scale formation;
- Stability of initial structure.
Thermomechanical stability is especially important for boiler steels, because at elevated temperatures in many alloys of iron with carbon spheroidization occurs - the collapse of the plates of iron carbide into separate parts, having a spherical shape. Spheroidization significantly reduces the heat resistance. This fact is particularly important for unalloyed boiler steels that have a pearlitic structure. The austenitic boiler steel exhibits the highest heat resistance. Evek GmbH offers to buy boiler steel at an affordable price in a wide range. We provide delivery of products to any point of the continent. The price is optimal.
Chemical composition of boiler steel, GOST 5520-79
According to
- 15K, 16K, 18K, 20K, 22K - carbon;
- 09G2S, 16GS, 10G2S1; 17GS, 17GS1S, 14GS - low-alloy;
- 12CrM, 10Cr2M, 12Cr1MoF - alloyed.
Percentage composition
| Steel grade | Carbon | Silicon | Manganese | Sulfur | Phosphorus | Chrome | Nickel | Molybdenum |
| not more than | ||||||||
| 15К | 0,12-0,20 | 0,15-0,30 | 0,35-0,65 | 0,040 | 0,040 | - | - | - |
| 16К | 0,12-0,20 | 0,17-0,37 | 0,45-0,75 | 0,040 | 0,040 | - | - | - |
| 18К | 0,14-0,22 | 0,17-0,37 | 0,55-0,85 | 0,040 | 0,040 | - | - | - |
| 20К | 0,16-0,24 | 0,15-0,30 | 0,35-0,65 | 0,040 | 0,040 | - | - | - |
| 22К | 0,19-0,26 | 0,17-0,40 | 0,7-1,0 | 0,035 | 0,040 | - | - | - |
| 12CRM | ≤ 0,16 | 0,17-0,37 | 0,4-0,7 | 0,025 | 0,025 | 0,8-1,10 | ≤ 0,30 | 0,40-0,55 |
| 10CR2M | 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 |
| 12CR1MOF* | 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 | - | - | - |
| 10G2C1 | ≤ 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 | - | - | - |
| 17G1S | 0,15-0,20 | 0,4-0,6 | 1,15-1,6 | 0,040 | 0,035 | - | - | - |
| 14CGS | 0,11-0,16 | 0,4-0,7 | 0,9-1,3 | 0,040 | 0,035 | 0,5-0,8 | - | - |
| _________________ * Vanadium 0.15%-0.30%. | ||||||||
At the request of the consumer in the carbon and low-alloy steels mass fraction of sulfur shall not exceed 0,025, 0,030 or 0,035%; phosphorus - 0,030 or 0,035%.
In sheet thicknesses over 20 mm of steel grades 15K and 20K allowed percentage of manganese up to 0.8%.
Chromium, nickel and copper content in carbon and low-alloy steels should not exceed 0,30% each, and their total percentage - up to 0,60%.
Copper content in alloyed steels must not exceed 0.20%, and when manufactured by the scrap process - up to 0.30%.
In low-alloy steels addition of aluminum and titanium is allowed in the calculation of obtaining in the rolled steel mass fraction of aluminum up to 0,05%, titanium - not more than 0,03%.
The percentage of aluminum in alloy steels must not exceed 0.02%.
Mass fraction of arsenic in carbon and low-alloy steels - up to 0,08%. When smelting steel from Kerch ores allowed percentage of arsenic up to 0.15%, and the mass fraction of phosphorus - no more than 0.030%.
1.7 The mass fraction of residual nitrogen in carbon and low alloy steel should be less than 0.008%, and when melting in electric furnaces - not more than 0.012%.
Buy. Supplier, price.
Are you interested in interesting information and history of boiler steel? Supplier Evek GmbH offers to buy boiler steel in any quantity at the manufacturer's price. We provide delivery of products to any point on the continent. The price is optimal. We invite you to partner cooperation/
