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20MnB5 Low-Alloy Steel EN10083-3

20MnB5 Low-Alloy Steel EN10083-3

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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...

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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.

Conventional Dimensions:

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.

Chemical Composition of 20MnB5 Alloy Steel

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

Mechanical Properties of 20MnB5 Alloy Steel

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

Equivalent Grades of 20MnB5 Alloy Steel

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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