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2023
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Free cutting steel 1215 and 45 steel
Source：
1215 free-cutting steel is an environmentally friendly material. Compared with 12L14, it does not contain lead and harmful substances to the environment. It has good machinability and is suitable for general electroplating axes, cutting materials and general parts. 1215, due to its accurate precision and good surface condition, easy-cutting steel products can be directly used, such as spraying, sanding, bending, drilling, or direct electroplating after fine drawing according to actual requirements, it saves a lot of machining time and saves the cost of configuring the processing machinery.
It is mainly used to make instruments, watches, parts, automobiles, machine tools and other machines with small force and strict requirements on size and smoothness.
| Tensile strength σb (MPa) | ≥ 42 |
| Conditional yield strength σ0.2 (MPa) | — |
| Elongation δ5 (%) | ≥ 22 |
| Section shrinkage ψ (%) | ≥ 34 |
| Hardness |
| AISI No. &[UNS No.] |
Chemical composition (%) | ||||||||||
| C | Si | Mn | P | S | Sn | Cr | Cu | Other | |||
| 1215 | 0.06 | 0.01 | 1.27 | 0.07 | 0.32 | 0.006 | 0.031 | 0.039 | |||
The difference between free cutting steel 1215 and 45 steel
Features and Uses of 1. Free Cutting Steel 1215 and 45 Steel
Free-cutting steel 1215 is a kind of low-carbon steel with high sulfur content and good cutting performance. It can be used to make instruments, watch parts, automobiles, machine tools and other parts used in various machines with small force and strict requirements on size and finish. At the same time, 1215 steel can be directly used due to its accurate surface condition, such as spraying, sanding, bending and drilling, and can also be directly electroplated after precision pulling according to actual requirements.
45 steel is a kind of carbon structural steel with carbon content of about 0.45, high hardness and good toughness. It is commonly used to make molds such as templates, pins, guide posts, etc. and is widely used in mechanical manufacturing. The quenched and tempered parts have good comprehensive mechanical properties and are widely used in various important structural parts, especially connecting rods, bolts, gears and shafts that work under alternating loads. In addition, 45 steel can also be carburized, generally used for surface wear-resistant, core impact-resistant heavy-duty parts.
2. how to distinguish between free cutting steel 1215 and 45 steel mixed
If free cutting steel 1215 and 45 steel are mixed together, how to distinguish it? We can distinguish according to the color and weight of the steel.
The color of free-cutting steel 1215 is usually light gray or silvery white, and the weight is relatively light. The color of No. 45 steel is darker, dark gray or black, and the weight is heavier than that of 1215 steel. Therefore, it is possible to judge the mixing of free-cutting steel 1215 and No. 45 steel by observing the color and weight of the steel.
In short, although free-cutting steel 1215 and 45 steel have differences in morphology and performance, they each play an important role in different fields and uses. In actual production, we should choose suitable steel according to needs and requirements, and avoid the mixed use of two kinds of steel to ensure product quality and use effect.
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