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The chemical composition of DIN 46Cr2 1.7006 is precisely controlled to ensure its mechanical performance.
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Below is the standard composition range (by weight percentage):
Element | Content Range |
C (Carbon) | 0.42-0.50% |
Si (Silicon) | Max 0.40% |
Mn (Manganese) | 0.50-0.80% |
P (Phosphorus) | Max 0.025% |
S (Sulfur) | Max 0.035% |
Cr (Chromium) | 0.40-0.60% |
The moderate chromium content (0.40-0.60%) enhances hardenability and wear resistance, while strict limits on phosphorus and sulfur (max 0.025% and 0.035% respectively) minimize brittleness and improve machining performance. This composition also ensures compatibility with standard heat treatment processes, allowing manufacturers to achieve desired hardness and toughness levels consistently.
DIN 46Cr2 1.7006 exhibits distinct mechanical properties based on its form (quenched/tempered steel or open die forgings) and size range, as specified by EN standards.
Size Range | Tensile Strength | Yield Strength | Elongation | Area of Reduction | Impact Value (At RT) |
d ≤ 16mm / t ≤ 8mm | 900-1100 Mpa | Min 650 Mpa | Min 12% | Min 35% | / |
16mm < d ≤ 40mm / 8mm < t ≤ 20mm | 800-950 Mpa | Min 550 Mpa | Min 14% | Min 40% | Min 35 J |
40mm < d ≤ 100mm / 20mm < t ≤ 60mm | 650-800 Mpa | Min 400 Mpa | Min 15% | Min 45% | Min 35 J |
Sampling for these tests follows EN 10083-1, with samples taken 12.5mm below the heat-treated surface to ensure accuracy.
For open die forgings of DIN 46Cr2 1.7006, the mechanical properties meet the following standards for sizes ≤ 70mm:
· Tensile Strength: Min 650 Mpa
· Yield Strength: Min 400 Mpa
· Elongation: Min 15%
· Impact Value (At RT): Min 35 J
Sampling for forgings adheres to EN 10250-1, with samples taken 4/T below the surface (minimum 20mm, maximum 80mm) and t/2 from the end (where t = equivalent thickness of the forging’s ruling section).
DIN 46Cr2 1.7006 offers excellent hardenability, with surface hardness varying by heat treatment method:
Heat Treatment Method | Hardness |
Flame or Induction Hardening | 54 HRC |
Treated for Shearability (+S) | Max 255 HB |
Soft Annealed (+A) | Max 223 HB |
Quenched & Tempered (+QT) | 28-32 HRC (Common Range) |
For applications requiring specific hardenability (e.g., +H, +HH, +HL), the Rockwell C (HRC) hardness at different distances from the quenched end is standardized as follows:
Distance from Quenched End (mm) | +H (Min HRC) | +H (Max HRC) | +HH (Min HRC) | +HH (Max HRC) | +HL (Min HRC) | +HL (Max HRC) |
1.5 | 54 | 63 | 57 | 63 | 54 | 60 |
3 | 49 | 61 | 53 | 61 | 49 | 57 |
5 | 40 | 59 | 46 | 59 | 40 | 53 |
7 | 32 | 57 | 40 | 57 | 32 | 49 |
9 | 28 | 53 | 36 | 53 | 28 | 45 |
Hunan Qilu Steel provides DIN 46Cr2 1.7006 in multiple forms, with strict size tolerances to meet diverse machining needs:
Product Type | Size Range | Length |
Cold Drawn Bar | Φ3-Φ80mm | 6000-9000mm |
Hot Rolled Bar | Φ16-Φ310mm | 6000-9000mm |
Hot Forged Bar | Φ100-Φ1200mm | 3000-5800mm |
Hot Rolled Plate/Sheet | Thickness: 3-200mm; Width: 1500-2500mm | 2000-5800mm |
Hot Forged Block | Thickness: 80-800mm; Width: 100-2500mm | 2000-5800mm |
Surface Finish | Tolerance | Straightness |
Turned | +0/+3mm | Max 1mm/1000mm |
Milled | +0/+3mm | Max 1mm/1000mm |
Grinding (Best) | +0/+0.05mm | Max 1mm/1000mm |
Polished (Best) | +0/+0.05mm | Max 1mm/1000mm |
Peeled (Best) | +0/+0.1mm | Max 1mm/1000mm |
Black Forged | +0/+5mm | Max 3mm/1000mm |
Black Rolled | +0/+1mm | Max 3mm/1000mm |
Common stock sizes for hot-rolled bars include Φ16mm, Φ18mm, Φ20mm, ..., Φ310mm (full range available upon request), while hot-forged bars stock includes Φ310mm to Φ550mm. Stock levels update daily, so customers are advised to contact sales for real-time availability.
DIN 46Cr2 1.7006 responds well to standard heat treatment processes, with parameters tailored to achieve desired properties:
· Soft Annealing: Heat to 820-850℃, soak at temperature, cool in furnace (≤30℃/h) to 600℃, then air cool. This reduces hardness for easy machining.
· Normalized: Heat to 850-880℃, soak, then air cool. Improves microstructure uniformity and prepares the material for quenching.
· Quenching & Tempering: Heat to 820-860℃ (lower end for water quenching, upper end for oil quenching), soak, quench in water/oil, then temper at 540-680℃ and air cool. This process delivers the material’s signature high strength and toughness.
DIN 46Cr2 1.7006 has relatively poor weldability due to its carbon content (0.42-0.50%)—a threshold above 0.25% typically leads to reduced weldability. Without proper precautions (e.g., preheating to 200-300℃, post-weld annealing), welds may develop cracks or exhibit reduced strength. For applications requiring welding, alternative low-carbon alloys are recommended, or consultation with Hunan Qilu Steel’s technical team for customized solutions.
DIN 46Cr2 1.7006 is a staple in the automotive industry, where its high strength and wear resistance meet the demands of critical drivetrain and chassis components:
· Drive Shafts & Axles: Withstands high torsional stress and impact loads during acceleration and braking, ensuring long service life.
· Gears & Synchronizer Rings: The material’s 28-32 HRC hardness (after QT) resists tooth wear, while its toughness prevents chipping—essential for smooth gear engagement.
· Steering System Components: Precision-machined parts (e.g., tie rods, steering knuckles) benefit from the steel’s dimensional stability and load-bearing capacity, enhancing driving safety.
Below is the standard composition range (by weight percentage):
Element | Content Range |
C (Carbon) | 0.42-0.50% |
Si (Silicon) | Max 0.40% |
Mn (Manganese) | 0.50-0.80% |
P (Phosphorus) | Max 0.025% |
S (Sulfur) | Max 0.035% |
Cr (Chromium) | 0.40-0.60% |
The moderate chromium content (0.40-0.60%) enhances hardenability and wear resistance, while strict limits on phosphorus and sulfur (max 0.025% and 0.035% respectively) minimize brittleness and improve machining performance. This composition also ensures compatibility with standard heat treatment processes, allowing manufacturers to achieve desired hardness and toughness levels consistently.
DIN 46Cr2 1.7006 exhibits distinct mechanical properties based on its form (quenched/tempered steel or open die forgings) and size range, as specified by EN standards.
Size Range | Tensile Strength | Yield Strength | Elongation | Area of Reduction | Impact Value (At RT) |
d ≤ 16mm / t ≤ 8mm | 900-1100 Mpa | Min 650 Mpa | Min 12% | Min 35% | / |
16mm < d ≤ 40mm / 8mm < t ≤ 20mm | 800-950 Mpa | Min 550 Mpa | Min 14% | Min 40% | Min 35 J |
40mm < d ≤ 100mm / 20mm < t ≤ 60mm | 650-800 Mpa | Min 400 Mpa | Min 15% | Min 45% | Min 35 J |
Sampling for these tests follows EN 10083-1, with samples taken 12.5mm below the heat-treated surface to ensure accuracy.
For open die forgings of DIN 46Cr2 1.7006, the mechanical properties meet the following standards for sizes ≤ 70mm:
· Tensile Strength: Min 650 Mpa
· Yield Strength: Min 400 Mpa
· Elongation: Min 15%
· Impact Value (At RT): Min 35 J
Sampling for forgings adheres to EN 10250-1, with samples taken 4/T below the surface (minimum 20mm, maximum 80mm) and t/2 from the end (where t = equivalent thickness of the forging’s ruling section).
DIN 46Cr2 1.7006 offers excellent hardenability, with surface hardness varying by heat treatment method:
Heat Treatment Method | Hardness |
Flame or Induction Hardening | 54 HRC |
Treated for Shearability (+S) | Max 255 HB |
Soft Annealed (+A) | Max 223 HB |
Quenched & Tempered (+QT) | 28-32 HRC (Common Range) |
For applications requiring specific hardenability (e.g., +H, +HH, +HL), the Rockwell C (HRC) hardness at different distances from the quenched end is standardized as follows:
Distance from Quenched End (mm) | +H (Min HRC) | +H (Max HRC) | +HH (Min HRC) | +HH (Max HRC) | +HL (Min HRC) | +HL (Max HRC) |
1.5 | 54 | 63 | 57 | 63 | 54 | 60 |
3 | 49 | 61 | 53 | 61 | 49 | 57 |
5 | 40 | 59 | 46 | 59 | 40 | 53 |
7 | 32 | 57 | 40 | 57 | 32 | 49 |
9 | 28 | 53 | 36 | 53 | 28 | 45 |
Hunan Qilu Steel provides DIN 46Cr2 1.7006 in multiple forms, with strict size tolerances to meet diverse machining needs:
Product Type | Size Range | Length |
Cold Drawn Bar | Φ3-Φ80mm | 6000-9000mm |
Hot Rolled Bar | Φ16-Φ310mm | 6000-9000mm |
Hot Forged Bar | Φ100-Φ1200mm | 3000-5800mm |
Hot Rolled Plate/Sheet | Thickness: 3-200mm; Width: 1500-2500mm | 2000-5800mm |
Hot Forged Block | Thickness: 80-800mm; Width: 100-2500mm | 2000-5800mm |
Surface Finish | Tolerance | Straightness |
Turned | +0/+3mm | Max 1mm/1000mm |
Milled | +0/+3mm | Max 1mm/1000mm |
Grinding (Best) | +0/+0.05mm | Max 1mm/1000mm |
Polished (Best) | +0/+0.05mm | Max 1mm/1000mm |
Peeled (Best) | +0/+0.1mm | Max 1mm/1000mm |
Black Forged | +0/+5mm | Max 3mm/1000mm |
Black Rolled | +0/+1mm | Max 3mm/1000mm |
Common stock sizes for hot-rolled bars include Φ16mm, Φ18mm, Φ20mm, ..., Φ310mm (full range available upon request), while hot-forged bars stock includes Φ310mm to Φ550mm. Stock levels update daily, so customers are advised to contact sales for real-time availability.
DIN 46Cr2 1.7006 responds well to standard heat treatment processes, with parameters tailored to achieve desired properties:
· Soft Annealing: Heat to 820-850℃, soak at temperature, cool in furnace (≤30℃/h) to 600℃, then air cool. This reduces hardness for easy machining.
· Normalized: Heat to 850-880℃, soak, then air cool. Improves microstructure uniformity and prepares the material for quenching.
· Quenching & Tempering: Heat to 820-860℃ (lower end for water quenching, upper end for oil quenching), soak, quench in water/oil, then temper at 540-680℃ and air cool. This process delivers the material’s signature high strength and toughness.
DIN 46Cr2 1.7006 has relatively poor weldability due to its carbon content (0.42-0.50%)—a threshold above 0.25% typically leads to reduced weldability. Without proper precautions (e.g., preheating to 200-300℃, post-weld annealing), welds may develop cracks or exhibit reduced strength. For applications requiring welding, alternative low-carbon alloys are recommended, or consultation with Hunan Qilu Steel’s technical team for customized solutions.
DIN 46Cr2 1.7006 is a staple in the automotive industry, where its high strength and wear resistance meet the demands of critical drivetrain and chassis components:
· Drive Shafts & Axles: Withstands high torsional stress and impact loads during acceleration and braking, ensuring long service life.
· Gears & Synchronizer Rings: The material’s 28-32 HRC hardness (after QT) resists tooth wear, while its toughness prevents chipping—essential for smooth gear engagement.
· Steering System Components: Precision-machined parts (e.g., tie rods, steering knuckles) benefit from the steel’s dimensional stability and load-bearing capacity, enhancing driving safety.
