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4140 / 42CrMo4 / 1.7225 / SCM440TK Alloy Steel Honed Tube For Hydraulic Cylinder Skiving pipe DIN2391 BKS 20-520mm OD

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  • 4140 / 42CrMo4 / 1.7225 / SCM440TK Alloy Steel Honed Tube For Hydraulic Cylinder Skiving pipe DIN2391 BKS 20-520mm OD

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Description

4140 / 42CrMo4 / 1.7225 / SCM440TK Alloy Steel Honed Tube for Hydraulic Cylinder – Skiving Pipe DIN 2391 BKS

Dimensions:

  • Outer Diameter (O.D): 20 mm – 520 mm
  • Inner Diameter (I.D): 12 mm – 510 mm

Tolerances and Specifications:

  • I.D Tolerance (mm): H7 – H10
  • Roughness (I.D): ≤ 0.3 μm
  • Straightness: 0 – 0.60 mm/meter
  • Minimum Order Quantity (MOQ): 1.0 – 3.0 tons

Inspection and Quality Control:

  • Inspection Types: Chemical analysis, Mechanical analysis, Roughness, Straightness, Surface quality, and Dimension report
  • Third-party Inspection: Acceptable

Origin:

  • Place of Origin: Jiangsu/Hubei, China

Applications of 4140 Alloy Steel Honed Tube

The 4140 / 42CrMo4 / 1.7225 / SCM440TK alloy steel honed tube is widely utilized in various applications, including:

  • Hydraulic cylinders
  • Hydraulic jacks
  • Hydraulic oil cylinders
  • Pneumatic cylinders
  • Swivel cranes
  • Injection machines
  • Petrifaction oil pumps
  • Coal mining machinery
  • Engineering machinery
  • Crane and transport machinery
  • Auto transmission axes
  • Plastic machinery
  • Absorbers
  • Spin printing and dyeing

Quality Standards

Our honed tubes conform to the following quality standards:

  • DIN 2391: Seamless Precision Steel Tubes
  • EN 10305: Steel Tubes for Precision Applications (Seamless Cold Drawn Tubes)

Comparison of All Grades

ASTM EN JIS GB
4140 42CrMo4/1.7225 SCM440TK 42CrMo

Chemical Composition (%)

Steel Grade C Si Mn P S Cr Mo
4140 0.38-0.43 0.15-0.35 0.75-1.00 0.040 max 0.040 max 0.80-1.10 0.15-0.25
42CrMo4 0.38-0.45 0.40 max 0.60-0.90 0.025 max 0.035 max 0.90-1.20 0.15-0.30
SCM440TK 0.38-0.43 0.15-0.35 0.60-0.90 0.030 max 0.030 max 0.90-1.20 0.15-0.30
42CrMo 0.38-0.45 0.17-0.37 0.50-0.80 0.030 max 0.030 max 0.90-1.20 0.15-0.25

Tolerances for Inner Diameter (mm)

Inner Diameter Range (mm) H7 H8 H9 H10
10 < ID ≤ 18 -0, +0.018 -0, +0.027 -0, +0.043 -0, +0.070
18 < ID ≤ 30 -0, +0.021 -0, +0.033 -0, +0.052 -0, +0.084
30 < ID ≤ 50 -0, +0.025 -0, +0.039 -0, +0.062 -0, +0.100
50 < ID ≤ 80 -0, +0.030 -0, +0.046 -0, +0.074 -0, +0.120
80 < ID ≤ 120 -0, +0.035 -0, +0.054 -0, +0.087 -0, +0.140
120 < ID ≤ 180 -0, +0.040 -0, +0.063 -0, +0.100 -0, +0.160
180 < ID ≤ 250 -0, +0.046 -0, +0.072 -0, +0.115 -0, +0.185
250 < ID ≤ 315 -0, +0.052 -0, +0.081 -0, +0.130 -0, +0.210
315 < ID ≤ 400 -0, +0.057 -0, +0.089 -0, +0.140 -0, +0.230
400 < ID ≤ 500 -0, +0.063 -0, +0.097 -0, +0.155 -0, +0.250

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

Condition Tensile Strength Rm (MPa) Yield Strength R2 (MPa) Elongation in 2 in or 50 mm A (%)
+BKS 830 min 660 min 10 min

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