Low Alloy Steel Plate
What is low alloy steel plate?
Low alloy steel refers to alloy steel with a total alloying element content of less than 5%. Low alloy steel is relative to carbon steel. On the basis of carbon steel, one or several alloying elements are intentionally added to the steel in order to improve the properties of the steel. When the amount of alloy added exceeds the normal content of carbon steel produced by normal production methods, the steel is called alloy steel.
Characteristics of low alloy plates
Low alloy plate is a kind of steel mainly composed of carbon, manganese, silicon and other elements, but it is different from ordinary steel plate in that a certain amount of alloying elements are added, such as vanadium, chromium, nickel, molybdenum, etc. These alloying elements can significantly improve the strength and corrosion resistance of steel. The characteristics of low alloy plates are as follows:
1. High strength: The strength of low alloy plate is more than 30% higher than that of ordinary carbon steel, so it is widely used in fields such as machinery manufacturing, construction and shipbuilding.
2. Good corrosion resistance: Low alloy plates add a certain amount of alloy elements, which can significantly improve the corrosion resistance of steel, especially in harsh environments, such as marine, chemical and other fields.
3. Good weldability: The low alloy plate has good weldability and can improve the strength and corrosion resistance after welding.
low alloy steel sheet me
All Steel Grades Chart for Low Alloy Steel Plate
| STANDARD | STEEL GRADE |
| DIN 17100 DIN 17102 | St44-2,St44-3,St52-3,St50-2,St60-2,St70-2,StE285, WStE285,TstE285,EstE285,StE315,WstE315,TstE315, EstE315,StE355,WstE355,TstE355,EstE355,StE380,WstE380, TstE380,EstE380,StE420,WstE420,TstE420,EstE420,StE460, WstE460,TstE460,EstE460,StE500,WstE500,TstE500,EstE500,etc |
| EN10025 | S275JR,S275J0,S275J2,S355JR,S355J0,S355J2,S355K2,S450J0 S275M,S275ML,S355M,S355ML,S420M,S420ML,S460M, S460ML,S275N,S275NL,S355N,S355NL,S420N,S420NL,S460N,S460NL,etc |
| ASTM ASME | A572/A572M SA572/SA572M A572 Grade 42,A572 Grade 50,A572 Grade 60,A572 Grade 65 SA572 Grade 42,SA572 Grade 50,SA572 Grade 60,SA572 Grade 65 A633/A633M SA633/SA633M A633 Grade A,A633 Grade C,A633 Grade D,A633 Grade E SA633 Grade A,SA633 Grade C,SA633 Grade D,SA633 Grade E A709/A709M SA709/SA709M A709 Grade 36,A709 Grade 50,A709 Grade 50W, A709 Grade HPS 50W,A709 Grade HPS 70W SA709 Grade 36,SA709 Grade 50,SA709 Grade 50W, SA709 Grade HPS 50W,SA709 Grade HPS 70W,etc |
| GB/T1501 | Q295A,Q295B,Q345A,Q345B,Q345C,Q345D,Q345E,Q390A, Q390B,Q390C,Q390D,Q390E,Q420A,Q420B,Q420C,Q420D, Q420E, Q460A,Q460B,Q460C,Q460D,Q460E,etc |
| JIS G3106 | SM490A,SM490B,SM490C,SM490YA,SM490YB,SM520B, SM520C,SM570,etc |
Advantages of low alloy plates
Excellent mechanical properties
Low alloy plates have high strength and hardness, excellent tensile, yield and impact strength, and can meet the requirements of heavy load, high strength and high durability.
good corrosion resistance
The corrosion resistance of low-alloy plates is better than that of ordinary steel plates, and they can maintain a long service life, especially in harsh environments such as oceans and chemical industries.
good plasticity
Low alloy plates have good plasticity and can meet various complex shapes, sizes and requirements.
Lightweight design
Low alloy plates have the characteristics of high strength and lightweight, and can meet the needs of various lightweight designs, such as automobiles, aerospace and other fields.
The difference between low alloy steel and high alloy steel
1、Different definitions
Low alloy steel refers to alloy steel with less than 5% total alloying elements. Low alloy steel is relative to carbon steel, is based on carbon steel, in order to improve the performance of the steel, and intentionally add one or more alloying elements to the steel. When the amount of alloy added exceeds the general content of carbon steel by normal production methods, the steel is called alloy steel.
High-alloy steel refers to the steel in the alloying elements in more than 10% of the alloy steel. Its brand name is crowned with the letter X, followed by the average carbon content of the number (parts per million) and alloying element symbols (arranged by content), and finally the average percentage of the content of the main alloying element is marked (rounded to the nearest whole number).
2、The nature of different:
The yield point of low-composite steel structural components determines the stress that the structure can withstand without permanent deformation. The minimum yield point of typical carbon structural steel is 235MPa. and the minimum yield point of typical low alloy high strength steel is 345MPa. therefore, according to the proportionality of its yield point, the use of low alloy high strength steel allowable stress than carbon structural steel 1.4 times higher.
High alloy steel after quenching and tempering, the organization are slat martensite, hardness is maintained at about 50HRC; corrosion resistance are slightly reduced, but still in a level, that is, the 7th level is still corrosion resistance. When the other components remain unchanged, molybdenum content reduced to 0.5%, the impact toughness of the specimen to improve.
3、Different uses:
Low-alloy steel in construction machinery, ships, bridges, high-rise buildings, boilers and pressure vessels, electric power, a variety of vehicle manufacturing has been widely used. This is inseparable from its characteristics (eg: plasticity, toughness, welding performance).
High-alloy steel has a high-quality alloy steel, special alloy steel; according to the characteristics and uses are divided into alloy structural steel, stainless steel, acid-resistant steel, wear-resistant steel, heat-resistant steel, alloy tool steel, rolling bearing steel, alloy spring steel, and special properties of the steel (eg, soft magnetic steel, permanent magnetic steel, non-magnetic steel) and so on.
Production process of low alloy steel plate
Primary smelting → LF refining → VD treatment → continuous casting (die casting) → cleaning, heating → rolling → (stacking) → surface inspection → batching → flaw detection → heat treatment → cutting and sampling → performance inspection → storage.
Introduction Of Alloying Elements In Low Alloy Steel Plate
The most commonly used alloying elements in low alloy steels are manganese, silicon, chromium and nickel. If corrosion resistance must be improved, copper is added to the steel. Such elements (with the exception of chromium and nickel) increase the strength limit, change the plasticity slightly and reduce the impact toughness.
Low-alloy steels contain no more than 1% nickel. This element is not significant enough to strengthen the steel, but has a good effect on plasticity and impact toughness, and improves the resistance of steel to brittle damage. The amount of nickel is often limited by its scarcity.
In the case of multiple alloying, chromium increases the strength of the steel and has a good effect on low-temperature stability. In the case of low alloy steels in general (≤0.9%) chromium has no adverse effect on weldability.
Low-alloy steels are usually supplemented with 0.3% copper. At this content, copper improves corrosion resistance and results in improved strength properties. In addition, such a copper content has no adverse effect on the weldability of the steel and does not cause red brittleness.
Our Factory
We have established long-term cooperative relationships with dozens of factories in China to ensure that our products are manufactured using high-quality materials and in sync with various international standards, with an annual export volume of more than 80,000 tons. Gnee Group is committed to becoming the world's most internationally competitive supply chain group, meeting the different needs of different customers, and truly realizing: one-stop service, making choice easier.
FAQ
Q: What is low alloy steel plate?
Q: What are the uses of low alloy steel plates?
Q: What are the implementation standards for low alloy steel plates?
Q: What are the properties of low alloy steel plates?
Q: What are the delivery states for low alloy steel plates?