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Standard: EN10083-3
Description: 20MnB5 steel is a high-strength low-alloy steel, classified as a quenched and tempered alloy structural steel. Its material number is 1.5530, and it complies with the EN10083-3 standard. 20MnB5 low-alloy steel boasts excellent comprehensive mechanical pro...
20MnB5 steel is a high-strength low-alloy steel, classified as a quenched and tempered alloy structural steel. Its material number is 1.5530, and it complies with the EN10083-3 standard. 20MnB5 low-alloy steel boasts excellent comprehensive mechanical properties, good weldability, and good heat treatment properties. 20MnB5 low-alloy steel is widely used in industrial applications requiring high strength, wear resistance, and toughness.
20MnB5 low-alloy steel is primarily used for mechanical components requiring high strength and wear resistance. Due to its boron content, 20MnB5 low-alloy steel exhibits excellent hardenability and wear resistance after proper heat treatment. 20MnB5 low-alloy steel is also widely used in the automotive industry, machinery manufacturing, and mold manufacturing.
Round bars: Diameter ranging from 10 mm to 200 mm.
Flat bars: Thickness from 5 mm to 50 mm, width from 20 mm to 300 mm.
Steel Plates: Thickness from 2 mm to 100 mm.
Forged components: Custom dimensions based on requirements.
The chemical composition of 20MnB5 steel is critical to its performance.
| Element | C | Si | Mn | P | S | Cr | B |
|---|---|---|---|---|---|---|---|
| Content (%) | 0.17-0.23 | ≤0.40 | 1.10-1.40 | ≤0.025 | ≤0.035 | 0.30-0.60 | 0.0008-0.0050 |
The mechanical properties of 20MnB5 alloy steel make it suitable for high-stress applications. These properties vary depending on the heat treatment process.
| Property | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| Value (Quenched & Tempered) | ≥800 | 1000-1250 | ≥10 | 300-400 |
20MnB5 alloy steel has equivalent grades in other international standards, which can be used interchangeably in certain applications.
| Standard | Equivalent Grade |
|---|---|
| EN | 20MnB5 |
| DIN | 1.5530 |
| SAE/AISI | 15B21 (approximate) |
| DIN, WNr | 19MnB4 |
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