1.7147 Material 20MnCr5 Steel Equivalent, Properties, Composition

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20MnCr5 steel (DIN 1.7147 material)

20MnCr5 steel (1.7147 material) is an European standard carburized steel (case hardening steel) with high strength and toughness and good hardenability. The quenching deformation is small, the low temperature toughness and the machinability are good, but the welding performance is low. It’s generally used after carburizing quenching or quenching and tempering. (For specification and data sheet, please see the tables below)

1.7147 steel is used to manufacture and reload large-section tempered parts and small-section carburized parts. It can also be used to manufacture medium and small parts with medium load and low impact, such as gears, shafts, spindles, friction wheels and gears of variable speed equipment, and the sleeve of the governor, etc.

(1.7147) 20MnCr5 Steel Chemical Composition

The chemical composition of 20MnCr5 steel are displayed in the following table.

Mechanical Properties of (20MnCr5) 1.7147 Steel

1.7147, 20MnCr5 Material Brinell hardness

• Treated for cold shearability: ≤ 255 HBW
• Soft annealed: ≤ 217 HBW
• Treated to hardness: 170-217 HBW
• Treated to ferrite-pearlite structure and hardness: 152-201 HBW
• Normalized: 140-201 HBW

20MnCr5, 1.7147 Tensile strength (after hardening and tempering at 200 °C)

• Dia. ≤ 16mm: Min. 1200 MPa
• 16 < Dia. ≤ 40mm: Min. 900 Mpa
• 40 < Dia. ≤ 100mm: Min. 700 Mpa

Heat Treatment Specification of 1.7147 Steel

• End quench test Austenitizing temperature: 870℃ (30-35 minutes)
• Carburizing temperature: 880-980 ℃
• Core-hardening temperature: 860-900 ℃
• Case-hardening temperature: 780-820 ℃
• Tempering: 150 – 200 ℃ (≥ 1 hour)

Equivalent Grade

EN 20MnCr5, 1.7147 steel equivalent to ISO, US ASTM AISI SAE, Germany DIN, British BSI, France NF, Japanese JIS and Chinese GB standard. (For reference)

(a): The chemical compositon has big differences compared with EN 10084.

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