S43120, new grade: 17Cr16Ni2, old grade: 1Cr17Ni2, American standard: ASTMA standard: S43100 431 in the large family of stainless steel, X22CrNi17 (14057) stainless steel is a material with special properties, which is widely used in various fields with its excellent corrosion resistance and mechanical properties. This article will introduce the characteristics, applications, chemical composition, heat treatment specifications and delivery status of X22CrNi17 stainless steel in detail to help readers better understand this excellent stainless steel material.
1. Characteristics and applications.
X22CrNi17 stainless steel, also known as 14057 stainless steel, is a German standard stainless steel material. It is equivalent to 1Cr17Ni2 stainless steel in China and 431 stainless steel in the United States. This stainless steel is known for its high corrosion resistance and mechanical properties, and is resistant to corrosion by a variety of media such as atmosphere, water, and acids.
In terms of application, X22CrNi17 stainless steel is widely used in chemical, food, pharmaceutical, petroleum and other fields. Due to its excellent corrosion resistance, it is used in the manufacture of various acid-base reactors, pipelines, valves and other equipment. In addition, due to its good mechanical properties, it is also used in the manufacture of various high-strength parts such as bolts, nuts, etc.
Second, the chemical composition.
The chemical composition of X22CrNi17 stainless steel has a significant impact on its properties. Its main chemical components are as follows:
Carbon (c): 014~0.23
Silicon (Si): 100
Manganese (mn): 100
Phosphorus (p): 0045
Sulfur (s): 0030
Chromium (cr): 1550~17.50
Molybdenum (Mo): —
Nickel (Ni): 150~2.50
Vanadium (v): —
The precise ratio of these chemistries gives X22CrNi17 stainless steel excellent corrosion resistance and mechanical properties. Among them, the content of chromium and nickel plays a crucial role in the performance of stainless steel. Chromium improves the corrosion resistance of stainless steel, while nickel helps improve its mechanical properties.
3. Heat treatment specifications and metallographic structure.
For optimal performance, X22CrNi17 stainless steel needs to be properly heat-treated. Its heat treatment specifications are as follows:
Annealing: 680 700 high temperature tempering air cooling;
Quenching: 950 1050 oil cooled;
Tempering: 275 350 air-cooled.
With these heat treatment specifications, the microstructure of stainless steel can be adjusted to improve its performance. In addition, the structural characteristics of X22CrNi17 stainless steel are martensitic type. This structure gives it high strength and hardness, as well as good corrosion resistance.
Fourth, the delivery status.
X22CrNi17 stainless steel is usually delivered in a heat-treated condition. According to the requirements of the contract, the type of heat treatment should be specified in the contract. If not indicated, it will be delivered in a non-heat-treated state. In the state of no heat treatment, stainless steel material is relatively soft and easy to process. After proper heat treatment, the material will achieve the best performance.
Summary: x22crni17 (1.)4057) stainless steel is a material with excellent corrosion resistance and mechanical properties, which is widely used in various fields. Knowledge of its properties, applications, chemical composition, heat treatment specifications, and delivery status will help to better select and use this excellent stainless steel material. Whether it is for engineers or materials researchers, it is necessary to master the basic knowledge of X22CrNi17 stainless steel.