Technological properties of 0Cr17Ni12Mo2 (AISI316) and 00Cr17Ni14Mo2 (AISI316L) steels

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Introduction

00Cr17Ni12Mo2 (AISI316) and 00Cr17Ni14Mo2 (AISI316L) steel are two different types of stainless steel that are used in the production of various industrial components and products. Both steels have excellent corrosion and oxidation resistance, as well as high strength and good formability. In this paper, the differences between these two steels will be examined in terms of their physical, mechanical and processing properties, as well as their applications.

Physical and mechanical properties

AISI316 and AISI316L steel have similar chemical compositions and can therefore be considered as very similar types of steel. The major differences between them are the levels of carbon content. AISI316L steel has a lower carbon content (0.03%) than AISI316 steel (0.08%). This results in differences in their physical and mechanical properties.

AISI316 steel has a higher tensile strength (515 MPa) than AISI316L steel (490 MPa). The yield strength of AISI316 steel is also higher (205 MPa) than that of AISI316L steel (170 MPa). This enables AISI316 steel to better resist localized plastic deformation and bending. In terms of hardness, AISI316 steel has a higher Brinell Hardness (HB) of 217.7 compared to AISI316L steel (175.5 HB). Overall, the higher hardening properties of AISI316 steel enable it to be used in more demanding applications.

Processing properties

The different levels of carbon content between AISI316 and AISI316L steel have a direct effect on their processing properties. AISI316L steel is more formable and weldable as it cold works and hardens less than AISI316 steel during processing. This makes AISI316L steel more suitable for cold forming and welding processes than AISI316 steel.

The thermal conductivity of AISI316 steel (15.4 W/mK) is higher than that of AISI316L steel (11.7 W/mK). This means that AISI316 steel will dissipate heat better than AISI316L steel during machining and welding processes. AISI316 steel also has higher thermal diffusivity (6.1 mm2/s) than AISI316L steel (5.1 mm2/s). This allows AISI316 steel to maintain a more uniform temperature during machining and welding operations due to its faster response to temperature changes.

Applications

AISI316 steel is often used in the production of fasteners, pumps, valves and other components that require high levels of strength and corrosion resistance, such as in chemical and oil & gas industries. On the other hand, AISI316L steel is often used in applications that require greater formability and weldability, such as in the production of kitchen sinks, containers, and other kitchenware.

Conclusion

In conclusion, AISI316 and AISI316L steel are two different types of stainless steels with excellent corrosion and oxidation resistance. AISI316 steel has higher strength and hardness than AISI316L steel, but is less formable and weldable. AISI316 steel is often used in applications that require high strength and corrosion resistance, whereas AISI316L steel is often used in applications that require greater formability and weldability.

，包括AISI316和AISI316L

AISI316 and AISI316L are stainless steel materials that belong to the same family but have different chemical composition. AISI316 is a kind of austenitic stainless steel, containing Cr17Ni12Mo2, with good resistance to heat and corrosion. It has good weldability and has excellent mechanical properties in the work temperature range of -253℃~ 850℃. AISI316L is an austenitic low carbon stainless steel, which is basically the same as AISI316, except that the carbon content of the latter is lower. It has the same corrosion resistance, but higher strength and good workability.

AISI316L has better performance than AISI316 in terms of toughness, rust resistance and corrosion resistance, but the price of AISI316L is much higher than that of AISI316. In practical applications, AISI316 is usually used as construction materials, such as in housing and other structures, while AISI316L is mostly used in chemical, petrochemical and other industrial applications. In many fields, AISI316 is suitable for use at temperatures lower than 650℃. While in those occasions requiring higher temperatures, the AISI316L should be used.

AISI316 and AISI316L have similar machinability, but due to their difference in carbon content, different types of machining tools may be required depending on the material. AISI316L is much easier to weld than AISI316, which is why it is often used in parts with larger complexity. But during welding, it may lead to the appearance of hardened zones, resulting in increased brittleness. Both AISI316 and AISI316L are excellent acids and alkali-resistant materials. In most applications, the two steels can work in quite good condition in the temperature range of -253℃~ 600℃. However, AISI316L alloy is preferred in cases requiring better weldability and galvanic corrosion resistance.