Brand:Unite Steel
MOQ:5
Quantity:3000
42CrMo4/1.7225/SCM440TK/4140 Alloy Steel Seamless Tube
Applications
42CrMo4/4140/1.7225/SCM440TK Alloy Steel Seamless Tubes, can bemade into Shafts, gears and parts subject to mechanical wear.
Steel Grade Comparison
| EN 10297 | JIS G3441 | ASTM A519 |
| 42CrMo4/1.7225 | SCM440TK | 4140 |
Chemical Composition(%)
| C | Mn | Si | P | S | Cr | Mo |
|---|---|---|---|---|---|---|
| 0.38-0.45 | 0.60-0.90-1.70 | 0.40 max | 0.035 max | 0.035 max | 0.90-1.20 | 0.15-0.30 |
Mechanical Properties( T=20°C if not differently stated )
| Wall Thickness(mm) | Tensile Strength Rm (Mpa) | Yield Strength R2 (Mpa) | Elongation in the longitudinal direction Al (%) | Elongation in the transverse direction At (%) | Impact properties in delivery condition Q+T (longitudinal) | Impact properties in delivery condition Q+T (transverse) |
|---|---|---|---|---|---|---|
| 8 max | 1100 min | 900 min | 10 min | 8 min | 30 min(KV, J, at 20 °C) | /(KV, J, at 20 °C) |
| 8-20 | 1100 min | 750 min | 11 min | 9 min | 35 min(KV, J, at 20 °C) | 22 min(KV, J, at 20 °C) |
| 20-50 | 900 min | 650 min | 12 min | 10 min | 35 min(KV, J, at 20 °C) | 22 min(KV, J, at 20 °C) |
| 50-80 | 800 min | 550 min | 13 min | 11 min | 35 min(KV, J, at 20 °C) | 22 min(KV, J, at 20 °C) |
Dimensions Tolerance
| Outer Diameter Scope | Outer Diameter Tolerance | Wall Thickness/Outer Diameter ratio | Wall Thickness Tolerance | Length Scope | Length Tolerance |
|---|---|---|---|---|---|
| OD219mm max | ±1% or ±0.5 mm whichever is the greater | any | ±12.5% or ±0.4 mm whichever is the greater | 6000mm max | -0mm,+10mm |
| OD219mm min | ±1% | 0.025 max | ±20% | 6000mm-12000 | -0mm,+15mm |
| OD219mm min | ±1% | 0.025-0.050 | ±15% | 12000mm min | minus not allowed |
| OD219mm min | ±1% | 0.050 min | ±12.5% | / | / |
Straightness
The deviation from straightness of tubes with an outside diameter Dequal to or greater than 33,7 mm shall not exceed 0,0015 L (L =Length of the tube). The deviation from straightness, for tubeswith D less than 33,7 mm, is not specified.
Surfaces Protection
The tubes are protected internally and externally with oil, whichprovides temporary protection against oxidisation whenundercover.
Tube ends
The tubes come with square cut and deburred ends.
Certification
Theproduct is supplied with 3.1.B inspection certificate,according tothe standards EN 10204 and ISO 10474.
Identification andMarking
Thetubes are marked in indelible ink, the details being repeated alongthe entire length of each tube and on a label, asfollows:
Manufacturer`strademark – manufacturing standard – dimensions -steel grade –supply condition – cast no. – item number.
Packaging
Thetubes come in strapped bundles. The minimum weight of each bundleis 2000kg; the maximum bundle weight being 5000kg, with a minimumof 4 pieces
