Type: | Alloy Steel Bar |
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Standard: | AISI, ASTM, DIN, JIS, GB, BS |
Composition: | Ferrous Steel Scrap |
Technique: | Forged |
Shape: | Bar |
Surface Treatment: | Machined |
Samples: |
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Customization: |
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Alloyed case hardening steel for the parts which require high core tensile strength and high hardness. Susceptible to average seized parts with high wearing resistance and variable loading such as: gears, screws, bolts, bushing, camshafts.
Steel adjusted for cutting with a cutting machine. The carburising temperature range can be higher than provided in the file (depending on the carburising process)
Steel adjusted for cutting with a cutting machine. The carburising temperature range can be higher than provided in the file (depending on the carburising process)
C | Si | Mn | P | S | Cr | Mo | Ni | B |
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0,17 - 0,22 | Max 0,40 | 1,10 - 1,40 | Max 0,025 | Max 0,035 | 1,00 - 1,30 | - | - | - |
Hardness after | Symbol | Value | |
Soft annealing (+A) | HB | ≤ 217 | |
Heat treatment (carburising, quenching and tempering) (+QT) | HRC | ≥ 60 | |
Ultimate tensile strength Rm, after quenching and tempering at 200 °C: | |||
Diameter, d, mm | d ≤ 16 | 16 < d ≤ 40 | 40 < d ≤ 100 |
Rm, MPa | 1200 | 950 | 750 |
Property | Unit | Value |
Density, ρ | g·cm-3 | 7.85 |
EN10084:2008 |
Jominity test HRC mm (mm distance from quenched end) |
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1.5 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 20 | 25 | 30 | 35 | 40 | |
max. | 49 | 49 | 48 | 46 | 43 | 42 | 41 | 39 | 37 | 35 | 34 | 33 | 32 |
min. | 41 | 39 | 36 | 33 | 30 | 28 | 26 | 25 | 23 | 21 | - | - | - |
Technological treatment processes | Possible application | Temperature, °C | ||
Hot forming | Forging | + | 1150 - 850 | |
Rolling | + | 1150 - 850 | ||
Thermochemical treatment | Carburising | + | 880 - 980 | |
Carbonitriding | + | 860 - 950 | ||
Heat treatment | Annealing | Normalising | + | 870 - 910 |
Soft annealing | + | 650 - 700 | ||
Heat treatment after carburising1) | Core hardening | + | 860 - 900 | |
Intermediate annealing | + | 670 - 720 | ||
Case hardening | + | 780 - 820 | ||
Tempering | + | 150 - 200 | ||
1) If possible, hardening has to be performed with the temperature equal or close to the heat treatment temperature |
ISO | CEN | Russia | |||
20MnCr5 | ISO 683-11:1987 | 20MnCr5 | EN 10084:1998 | - | - |
US | Japan | China | |||
~5120 | ASTM A 322-91 | - | - | ~20CrMn | GB 3077-88 |
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