DIN1.7147 SAE5120 20MnCr5 Case Hardening Steel

DIN1.7147 SAE5120 20MnCr5 Case Hardening Steel case hardening steel DIN1.7147 SAE5120 20MnCr5 Case Hardening Steel DIN1

DIN1.7147 SAE5120 20MnCr5 Case Hardening Steel

Applications

Alloyed case hardening steel for parts with a required core tensile strength of 1000 – 1300 N/mm² and good wearing resistance as boxes, piston bolts, spindles, camshafts, gears, shafts and other mechanical controlling parts.

All Grades Comparison:

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DIN Material No. AFNOR SAE UNI
20MnCr5 1.7147 20MC 5120 20MnCr5

Quality Standard:

BS EN 10084 2008 Case hardening steels

Chemical Composition(%)

C Mn Si P S Cr
0.17–0.22 1.10–1.40 0.40 max 0.035 max 0.035 max 1.00–1.30

Mechanical Properties( T=20°C if not differently stated )

Heat treatment state Diameter(mm) Rm (Mpa)
QUENCHED AND TEMPERED 16 max 1200 min
QUENCHED AND TEMPERED 16-40 1000 min
QUENCHED AND TEMPERED 40-100 800 min

HEAT TREATMENT AND HOT PLASTIC DEFORMATION TEMPERATURES

Process TEMPERATURE ° C Cooling Medium
Forging or hot rolling 850-1100 air
Normalizing 840-870 air
Soft Annealing 650-700 furnace 217HB max
Carburising 880-980 /
Core hardening 860-900 oil
Intermediate annealing 650-700 /
Case hardening 780-820 oil
Tempering 150-200 /

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