Carbon steels refer to a group of steels whose chemical composition is primarily made up of iron and carbon. These steels typically lack significant amounts of alloying elements such as chromium, nickel, or molybdenum. The key feature of carbon steels lies in their simple composition and processing, which has made them one of the most widely used types of steel in various industries.
Common applications of carbon steels include the construction of engineering structures, production of building components, and design of pressure hydraulic equipment. Due to their favorable mechanical properties and low production cost, carbon steels are considered an economical and efficient choice in many industrial and construction projects.
On the other hand, low-alloy steels, by adding alloying elements such as chromium, molybdenum, and nickel to their composition, offer superior mechanical and physical properties. These elements improve the strength, tensile resistance, and flexibility of the steel. Additionally, low-alloy steels exhibit greater resistance to wear and corrosion compared to carbon steels. These advantages are primarily due to the stronger structures created within the steel and the formation of protective layers against environmental destructive factors.
Due to these characteristics, low-alloy steels are highly suitable for industries that require high performance and long service life. Important applications of low-alloy steels include the production of equipment used in petrochemical industries, power plants, and other systems exposed to harsh operational conditions. Therefore, the choice between carbon and low-alloy steels depends on the specific needs of the project and the operating environment.
Steel Grade | C (%) | Mn (%) | Si (%) | Cr (%) | Mo (%) | Ni (%) | Other Elements (%) |
St 37 | 0-0.2 | 0.2-0.5 | 0.30 max | – | – | – | – |
Ck 45 | 0.42-0.5 | 0.5-0.8 | 0.35 Max | – | – | – | – |
Ck 35 | 0.32-0.39 | 0.5-0.8 | 0.15-0.35 | – | – | – | – |
St 52 | 0.22 Max | <1.6 | 0.55 Max | – | – | – | – |
1.6582(BOZ) | 0.3-0.38 | 0.5-0.8 | 0.4 | 1.3-1.7 | 0.15-0.3 | 1.3-1.7 | – |
WS140 | 065-0.75 | 0.70-0.85 | 0.45-0.65 | 2.0-2.3 | 0.30-0.40 | 0.1-0.3 | – |
WS170 | 0.80-0.90 | 0.70-0.85 | 0.70-1.20 | 2.0-2.4 | 0.30-0.45 | 0.1-0.5 | – |
GS20Mn5 | 0.17-0.23 | 1-1.5 | 0.6 Max | 0.3 Max | 0.15 Max | 0.4 Max | – |
1.7225(Mo40) | 0.38-0.45 | 0.6-0.9 | 0.4 Max | 0.9-1.2 | 0.15-0.3 | – | – |
1.2766 | 0.32-0.38 | 0.4-0.6 | 0.15-0.3 | 1.2-1.5 | 0.2-0.4 | 3.8-4.3 | – |
4140 | 0.38-0.43 | 0.75-1.00 | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 | – | – |
4130 | 0.28-0.33 | 0.40-0.60 | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 | – | – |
4340 | 0.38-0.43 | 0.60-0.80 | 0.15-0.35 | 0.70-0.90 | 0.20-0.30 | 1.65-2.00 | – |
8620 | 0.18-0.23 | 0.70-0.90 | 0.15-0.35 | 0.40-0.60 | 0.15-0.25 | 0.40-0.70 | – |
6150 | 0.47-0.54 | 0.70-0.90 | 0.15-0.35 | 0.80-1.10 | – | – | V: 0.10-0.15 |
5160 | 0.56-0.64 | 0.75-1.00 | 0.15-0.35 | 0.70-0.90 | – | – | – |
4145 | 0.43-0.48 | 0.75-1.00 | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 | – | – |
8630 | 0.28-0.33 | 0.60-0.90 | 0.15-0.35 | 0.40-0.60 | 0.15-0.25 | 0.40-0.70 | – |
12L14 | 0.15 max | 0.85-1.15 | 0.15 max | – | – | – | Pb: 0.15-0.35 |
4345 | 0.42-0.47 | 0.60-0.90 | 0.15-0.35 | 0.70-0.90 | 0.20-0.30 | 1.65-2.00 | – |
8625 | 0.23-0.28 | 0.70-0.90 | 0.15-0.35 | 0.40-0.60 | 0.15-0.25 | 0.40-0.70 | – |
9310 | 0.08-0.13 | 0.40-0.60 | 0.15-0.35 | 1.00-1.40 | 0.08-0.15 | 3.00-3.50 | – |
5140 | 0.38-0.43 | 0.70-0.90 | 0.15-0.35 | 0.70-0.90 | – | – | – |
8615 | 0.13-0.18 | 0.70-0.90 | 0.15-0.35 | 0.40-0.60 | 0.15-0.25 | 0.40-0.70 | – |
8640 | 0.38-0.43 | 0.70-0.90 | 0.15-0.35 | 0.40-0.60 | 0.15-0.25 | 0.40-0.70 | – |
5145 | 0.43-0.48 | 0.70-0.90 | 0.15-0.35 | 0.70-0.90 | – | – | – |
41B30 | 0.28-0.33 | 0.60-0.90 | 0.15-0.35 | 0.70-0.90 | 0.15-0.25 | – | B: 0.0005-0.003 |
8635 | 0.33-0.38 | 0.70-0.90 | 0.15-0.35 | 0.40-0.60 | 0.15-0.25 | 0.40-0.70 | – |
5130 | 0.28-0.33 | 0.70-0.90 | 0.15-0.35 | 0.70-0.90 | – | – | – |
9260 | 0.56-0.64 | 0.75-1.00 | 0.15-0.35 | 0.70-0.90 | – | 1.80-2.20 | – |
Sepahan Foolad Atashgah Casting Industries Company, with over 30 years of experience in the casting industry, is committed to self-sufficiency by leveraging skilled personnel and experienced managers. The company proudly serves various industries, including steel, copper, mining, cement, and their related sectors, as well as producing cast iron balls required by different industries.
Isfahan – Najafabad – Najafabad Industrial Park 2 – Sanat Square – Doctor Hesabi Blvd – Sub-corner 28
