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21MnCr5 / 1.2162 is a widely used case-hardening steel compliant with the European standard EN 17350. With a carbon content of 0.18–0.24%, this low-carbon alloy steel delivers high surface hardness, good core toughness, and excellent wear resistance after case hardening and subsequent heat treatment.
Its superior hardenability and good machinability make it a preferred choice for high-stress, wear-resistant components. Commonly employed in automotive transmissions, gear systems, shafts, and heavy-duty drivetrain parts, 21MnCr5 offers reliable performance and durability in demanding mechanical applications.
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DIN 21MnCr5 (also designated as 1.2162) is a widely acclaimed low-carbon alloy cold work tool steel compliant with the European standard EN 17350. This case-hardening steel stands out for its unique combination of high surface hardness and excellent core toughness—achieved through specialized heat treatment—making it a top choice for high-stress, wear-resistant components. With a carbon content of 0.18-0.24%, it offers exceptional hardenability and machinability, ensuring easy processing while delivering reliable performance in demanding mechanical applications. From automotive transmissions to heavy-duty industrial gearboxes, DIN 21MnCr5 is trusted for its durability and versatility across diverse industries.
After carburizing heat treatment, DIN 21MnCr5 forms a hard, wear-resistant surface (minimum HRC60 after hardening and tempering) paired with a tough core that absorbs impact loads—ideal for components subjected to friction and shock.
The alloy’s composition ensures uniform hardening throughout the material, even for large or complex parts. Its good machinability reduces production time and costs, allowing for precise shaping and finishing.
With chromium content of 1.00-1.30% and manganese levels of 1.10-1.40%, DIN 21MnCr5 resists wear and tear in high-contact applications, extending component service life and reducing maintenance needs.
Adhering to EN 17350 (ISO 4957 equivalent), DIN 21MnCr5 meets global quality benchmarks, making it suitable for international manufacturing projects and supply chains.
1: Steel equivalent
Country | ISO | Germany |
Standard | ISO 4957 | DIN17350 |
Grade | 21MnCr5 | 21MnCr5/1.2162 |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr |
21MnCr5/1.2162 | 0.18-0.24 | 0.15-0.35 | 1.10-1.40 | 0.030Max | 0.030Max | 1.00-1.30 |
3: Surface hardness and hardenability
Heat Treatment | Hardness |
Annealed (+A) | HB217Max |
| Hardening and Tempering (+HT) | HRC60 Min |
| Quenched and tempred (+QT) | HRC28-32(Common Range) |
4: Supply size & Tolerance & Stock size
Product type | Size range | Length |
Hot rolled bar | Φ10-Φ190mm | 2000-5800mm |
Hot forged bar | Φ200-Φ600mm | 2000-5800mm |
Hot rolled plate/sheet | T:10-60mm; W:310-810mm | 2000-5800mm |
Hot forged plate | T:70-250mm; W:310-810mm | 2000-5800mm |
Hot Forged block | T: 260-500mm; W: 300-1000mm | 2000-5800mm |
Surface Finish | Turned | Milled | Grinding(Best) | Polished(Best) | Peeled(Best) | Black Forged | Black Rolled |
Tolerance | +0/+3mm | +0/+3mm | +0/+0.05mm | +0/+0.05mm | +0/+0.1mm | +0/+5mm | +0/+1mm |
Straighness | 1mm/1000mm max. | 3mm/1000mm max. | |||||
For 1.2162 steel, because we don’t use them in domestic market, so there is no stocks for that material.
5: Ultrasonic Test
EN10228-3 class III or Sep 1921-84 D/D
6：Steel making & Forging processing
1): Steel making process:
EF+LF+VD
EAF+LF+VD
EF+LF+VD+ESR
EAF+LF+VD+ESR
2): Forging processing:
Pre-heat 1.2162 steel to 700-900℃
Initial temperature: 1150-1200℃
Final temperature: ≥850℃
Cooling in the air
7: Heat treatment
1): Annealed:
Heat 1.2162 steel to 850-880℃
Slowly cool in the furnace to below approximately 600°C, then remove from the furnace and air cool.
2): Quenching and tempering:
Heat 1.2162 steel to 840-870℃ in the salt bath furnace
Quench in oil
Temper steel at 550-580℃ in the furnace
Cooling in the water or in the oil.
Above curve in figure is a rough guide to the tempering behaviour of steels.
Gears: Transmission gears, differential gears, and engine timing gears.
Driveshaft Components: Output shafts, half-shafts, and splined shafts.
Clutch Components: Clutch shafts and ring gears.
Steering System Parts: Piston pins and steering linkages.
Heavy-Duty Gearboxes: Large gears and drive shafts for wind turbines, mining machinery, and marine transmissions.
High-Load Bearings: Bearing rings and rolling elements for impact-loaded applications.
Shaft Components: Shafts requiring high surface wear resistance and core strength.
Connecting Rods: For internal combustion engines and compressors.
Oil and Drilling Tools: Drill collars and drill pipe joints for high-strength, wear-resistant needs.
Molds: Cores and inserts for plastic or die-casting molds, leveraging machinability and heat treatment properties.
High-Stress Pins and Levers: Hydraulic system pins and control levers.
DIN 21MnCr5 (1.2162) adheres to the European standard EN 17350, with an ISO equivalent of 21MnCr5 (ISO 4957).
Annealed hardness is maximum HB217; after hardening and tempering, the minimum hardness is HRC60, with a common range of HRC28-32 for quenched and tempered parts.
Available sizes include hot rolled bars (Φ10-Φ190mm), hot forged bars (Φ200-Φ600mm), hot rolled plates (T:10-60mm; W:310-810mm), hot forged plates (T:70-250mm), and hot forged blocks (T:260-500mm), all with lengths of 2000-5800mm.
No, there is no domestic stock for DIN 21MnCr5 (1.2162), but it can be produced to order based on specific requirements.
DIN 21MnCr5 (also designated as 1.2162) is a widely acclaimed low-carbon alloy cold work tool steel compliant with the European standard EN 17350. This case-hardening steel stands out for its unique combination of high surface hardness and excellent core toughness—achieved through specialized heat treatment—making it a top choice for high-stress, wear-resistant components. With a carbon content of 0.18-0.24%, it offers exceptional hardenability and machinability, ensuring easy processing while delivering reliable performance in demanding mechanical applications. From automotive transmissions to heavy-duty industrial gearboxes, DIN 21MnCr5 is trusted for its durability and versatility across diverse industries.
After carburizing heat treatment, DIN 21MnCr5 forms a hard, wear-resistant surface (minimum HRC60 after hardening and tempering) paired with a tough core that absorbs impact loads—ideal for components subjected to friction and shock.
The alloy’s composition ensures uniform hardening throughout the material, even for large or complex parts. Its good machinability reduces production time and costs, allowing for precise shaping and finishing.
With chromium content of 1.00-1.30% and manganese levels of 1.10-1.40%, DIN 21MnCr5 resists wear and tear in high-contact applications, extending component service life and reducing maintenance needs.
Adhering to EN 17350 (ISO 4957 equivalent), DIN 21MnCr5 meets global quality benchmarks, making it suitable for international manufacturing projects and supply chains.
1: Steel equivalent
Country | ISO | Germany |
Standard | ISO 4957 | DIN17350 |
Grade | 21MnCr5 | 21MnCr5/1.2162 |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr |
21MnCr5/1.2162 | 0.18-0.24 | 0.15-0.35 | 1.10-1.40 | 0.030Max | 0.030Max | 1.00-1.30 |
3: Surface hardness and hardenability
Heat Treatment | Hardness |
Annealed (+A) | HB217Max |
| Hardening and Tempering (+HT) | HRC60 Min |
| Quenched and tempred (+QT) | HRC28-32(Common Range) |
4: Supply size & Tolerance & Stock size
Product type | Size range | Length |
Hot rolled bar | Φ10-Φ190mm | 2000-5800mm |
Hot forged bar | Φ200-Φ600mm | 2000-5800mm |
Hot rolled plate/sheet | T:10-60mm; W:310-810mm | 2000-5800mm |
Hot forged plate | T:70-250mm; W:310-810mm | 2000-5800mm |
Hot Forged block | T: 260-500mm; W: 300-1000mm | 2000-5800mm |
Surface Finish | Turned | Milled | Grinding(Best) | Polished(Best) | Peeled(Best) | Black Forged | Black Rolled |
Tolerance | +0/+3mm | +0/+3mm | +0/+0.05mm | +0/+0.05mm | +0/+0.1mm | +0/+5mm | +0/+1mm |
Straighness | 1mm/1000mm max. | 3mm/1000mm max. | |||||
For 1.2162 steel, because we don’t use them in domestic market, so there is no stocks for that material.
5: Ultrasonic Test
EN10228-3 class III or Sep 1921-84 D/D
6：Steel making & Forging processing
1): Steel making process:
EF+LF+VD
EAF+LF+VD
EF+LF+VD+ESR
EAF+LF+VD+ESR
2): Forging processing:
Pre-heat 1.2162 steel to 700-900℃
Initial temperature: 1150-1200℃
Final temperature: ≥850℃
Cooling in the air
7: Heat treatment
1): Annealed:
Heat 1.2162 steel to 850-880℃
Slowly cool in the furnace to below approximately 600°C, then remove from the furnace and air cool.
2): Quenching and tempering:
Heat 1.2162 steel to 840-870℃ in the salt bath furnace
Quench in oil
Temper steel at 550-580℃ in the furnace
Cooling in the water or in the oil.
Above curve in figure is a rough guide to the tempering behaviour of steels.
Gears: Transmission gears, differential gears, and engine timing gears.
Driveshaft Components: Output shafts, half-shafts, and splined shafts.
Clutch Components: Clutch shafts and ring gears.
Steering System Parts: Piston pins and steering linkages.
Heavy-Duty Gearboxes: Large gears and drive shafts for wind turbines, mining machinery, and marine transmissions.
High-Load Bearings: Bearing rings and rolling elements for impact-loaded applications.
Shaft Components: Shafts requiring high surface wear resistance and core strength.
Connecting Rods: For internal combustion engines and compressors.
Oil and Drilling Tools: Drill collars and drill pipe joints for high-strength, wear-resistant needs.
Molds: Cores and inserts for plastic or die-casting molds, leveraging machinability and heat treatment properties.
High-Stress Pins and Levers: Hydraulic system pins and control levers.
DIN 21MnCr5 (1.2162) adheres to the European standard EN 17350, with an ISO equivalent of 21MnCr5 (ISO 4957).
Annealed hardness is maximum HB217; after hardening and tempering, the minimum hardness is HRC60, with a common range of HRC28-32 for quenched and tempered parts.
Available sizes include hot rolled bars (Φ10-Φ190mm), hot forged bars (Φ200-Φ600mm), hot rolled plates (T:10-60mm; W:310-810mm), hot forged plates (T:70-250mm), and hot forged blocks (T:260-500mm), all with lengths of 2000-5800mm.
No, there is no domestic stock for DIN 21MnCr5 (1.2162), but it can be produced to order based on specific requirements.
