42CrMo Cold Drawn Honed Tube OD 16mm ID 8.6–15mm 500mm Length For Machinery

42CrMo Cold Drawn Honed Tube is a high-strength alloy steel tube designed for precision mechanical and engineering applications. Manufactured from 42CrMo chromium-molybdenum steel, the tube combines the strength and hardenability of 42CrMo with the dimensional accuracy and smooth internal surface achieved through cold drawing and precision honing.
42CrMo Honed Tube Specifications

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Product Overview

This product features a 16mm outside diameter (OD), 8.6–15mm inside diameter (ID) options, and a 500mm standard length. The honed internal bore provides controlled internal dimensions and a smooth surface, making the tube suitable for applications where accurate fit, consistent bore quality, and reliable mechanical performance are required.

The 42CrMo honed tube is commonly used in machinery, automotive components, hydraulic equipment, precision mechanical assemblies, and engineering applications. For international procurement, 42CrMo is commonly compared with grades such as 42CrMo4 / 1.7225, AISI 4140, and JIS SCM440, subject to the applicable material standard and delivery condition.

With its combination of high-strength alloy steel, cold-drawn construction, precision honing, and flexible ID options, this 42CrMo honing tube provides a practical solution for demanding precision tube applications.

Chemical Composition of 42CrMo

Physical Properties of 42CrMo

Property	Typical Value
Density	~7.85 g/cm³
Elastic Modulus	~205 GPa
Poisson's Ratio	~0.29
Thermal Conductivity	~42–46 W/(m·K)
Specific Heat Capacity	~460 J/(kg·K)
Electrical Resistivity	~0.20–0.25 μΩ·m
Coefficient of Thermal Expansion	~11.5–12.5 × 10⁻⁶ /K
Melting Range	~1,420–1,460°C
Magnetic Property	Ferromagnetic

Mechanical Properties of 42CrMo
For 42CrMo Cold Drawn Honed Tube, mechanical properties depend significantly on the heat-treatment condition, tube size, manufacturing process, and applicable standard. The following values can be used as typical reference values for 42CrMo alloy steel:

Mechanical Property	Typical Value
Tensile Strength (Rm)	≥ 980 MPa
Yield Strength (Re)	≥ 835 MPa
Elongation (A)	≥ 12%
Reduction of Area (Z)	≥ 45%
Impact Toughness (Charpy)	≥ 39 J
Hardness	Approx. 28–32 HRC
Elastic Modulus	Approx. 205 GPa
Poisson's Ratio	Approx. 0.29

Applicable Standards
The 42CrMo Cold Drawn Honed Tube can be manufactured according to applicable international standards for alloy steel tubes and precision cold-drawn seamless tubes. The exact standard should be confirmed according to the required material grade, manufacturing process, dimensional tolerances, heat treatment, and application.

Standard	Scope / Application	Related Grade
GB/T 8162	Seamless steel tubes for structural purposes	42CrMo
EN 10305-1	Seamless cold drawn steel tubes for precision applications	42CrMo4 / 1.7225
EN 10297-1	Seamless circular steel tubes for mechanical and general engineering applications	42CrMo4 / 1.7225
ASTM A519	Seamless carbon and alloy steel mechanical tubing	4140 / Comparable 42CrMo
DIN 2391	Cold drawn precision steel tubes	Comparable alloy steel grades

International Equivalent Grades of 42CrMo

42CrMo Equivalent Grade42CrMo is a chromium-molybdenum alloy structural steel commonly used for high-strength mechanical components. International standards contain several grades that are commonly considered equivalent or comparable to 42CrMo.
The most commonly referenced international grades include 42CrMo4, 1.7225, AISI 4140, SAE 4140, JIS SCM440, and EN19.

42CrMo Equivalent MaterialWhen searching for a 42CrMo equivalent material, buyers commonly compare 42CrMo with 42CrMo4, 1.7225, AISI 4140, and JIS SCM440. These alloy steels share similar chromium-molybdenum alloying characteristics and are widely used for high-strength engineering components.
For honed tube applications, however, material grade equivalence is only one consideration. The buyer should also confirm the manufacturing process, dimensional tolerances, internal surface roughness, heat treatment condition, and required mechanical properties.

42CrMo4 Equivalent

42CrMo4 is the European grade most commonly associated with 42CrMo. It is designated as 1.7225 under the European material numbering system.

42CrMo4 / 1.7225 is widely used for shafts, gears, mechanical components, hydraulic components, and other applications requiring high strength and good hardenability.

For a 42CrMo4 honed tube, the applicable product standard and delivery condition should be confirmed before treating it as a direct replacement for a 42CrMo tube.

42CrMo4 vs 42CrMo

42CrMo and 42CrMo4 are closely related chromium-molybdenum alloy steels, but they belong to different standard systems.

Feature	42CrMo	42CrMo4
Standard System	Chinese GB/T	EN / DIN
Material Family	Cr-Mo Alloy Steel	Cr-Mo Alloy Steel
Typical Application	Machinery and engineering components	Machinery and engineering components
Common Material Number	—	1.7225
Typical US Comparable Grade	AISI 4140	AISI 4140

42CrMo vs 4140

42CrMo vs SCM440

42CrMo and JIS SCM440 are commonly compared in international steel procurement. Both belong to the chromium-molybdenum alloy steel family and are widely used in machinery, automotive components, shafts, gears, and other high-strength applications.

The two grades have similar alloying concepts, but their standard specifications are different. When purchasing 42CrMo honed tubing, customers should confirm the exact grade, chemical composition, heat treatment condition, and mechanical properties required by the application.

42CrMo4 1.7225

42CrMo4 1.7225 is a commonly used European chromium-molybdenum alloy steel designation. The material is widely used where high strength, toughness, hardenability, and resistance to mechanical loading are required.

Typical applications include:

• Hydraulic components
• Mechanical shafts
• Gears
• Automotive components
• Heavy machinery
• Engineering components
• High-strength structural parts

For precision tube applications, 42CrMo4 / 1.7225 can be processed into cold drawn and honed tubes when the required material condition and manufacturing specification are met.

42CrMo 4140 Steel

42CrMo and AISI 4140 steel are commonly compared international alloy steel grades. Both are chromium-molybdenum steels used in applications requiring a combination of strength, toughness, and hardenability.

AISI 4140 is widely used in:

• Automotive components
• Machinery parts
• Hydraulic components
• Shafts and axles
• Gears
• Heavy-duty engineering equipment

When used for precision tubing, the material can be combined with cold drawing and honing processes to produce 42CrMo honed tube with controlled internal dimensions and a smooth bore.

42CrMo SCM440 Equivalent

JIS SCM440 is another international grade frequently compared with 42CrMo. Both are Cr-Mo alloy steels and are widely used in machinery and automotive applications.

For international procurement, buyers may encounter 42CrMo, 42CrMo4, 1.7225, AISI 4140, and SCM440 depending on the supplier's standard and target market.

Before replacing one grade with another, the relevant material standard, chemical composition, mechanical properties, heat treatment, and certification requirements should be reviewed.

42CrMo4 Steel Tube

42CrMo4 steel tube is a high-strength alloy steel tube used for demanding mechanical and engineering applications. When manufactured by cold drawing, the tube can achieve improved dimensional accuracy and surface quality compared with conventional hot-finished tubing.

For applications requiring a precise internal diameter, 42CrMo4 steel tube can be further honed to produce a smooth internal bore and controlled ID.

Typical applications include hydraulic cylinders, machinery, automotive components, precision mechanical assemblies, and engineering equipment.

42CrMo Honed Tube

A 42CrMo honed tube is a precision steel tube manufactured from 42CrMo alloy steel and finished by honing the internal surface.

The honing process is designed to improve:

• Internal diameter accuracy
• Bore surface quality
• Internal surface roughness
• Dimensional consistency
• Straightness and roundness, depending on manufacturing requirements

Our 42CrMo honed tube is available with an OD of 16mm, ID range of 8.6–15mm, and 500mm length for applications requiring compact precision tubing.

42CrMo4 Honed Tube

42CrMo4 honed tube combines the European 42CrMo4 / 1.7225 material designation with precision honing technology. It is suitable for applications requiring high-strength alloy steel together with accurate internal dimensions and a smooth bore.

Depending on the required specification, 42CrMo4 honed tubing can be used in hydraulic components, machinery, automotive systems, precision equipment, and other engineering applications.

Cold Drawing and Honing Process

The manufacturing process generally combines cold drawing with precision honing.

Cold Drawing

Cold drawing reduces the tube dimensions through a controlled deformation process. It can improve dimensional accuracy, surface quality, and consistency while producing the required OD and wall thickness.

Honing

Honing is an internal finishing process used to improve the bore quality of the tube. It allows tighter control of the internal diameter and produces a smooth internal surface suitable for precision applications.

The combination of cold drawn + honed processing makes the tube suitable for applications where both material strength and precise internal dimensions are important.

Applications

The 42CrMo cold drawn honed tube can be used in a variety of mechanical and engineering applications, including:

• Machinery components
• Automotive components
• Hydraulic equipment
• Hydraulic cylinder components
• Precision mechanical assemblies
• Engineering machinery
• Transmission components
• Industrial equipment

Why Choose 42CrMo Honed Tube?

• High-strength chromium-molybdenum alloy steel
• Cold drawn manufacturing process
• Precision honed internal bore
• Controlled 16mm outside diameter
• 8.6–15mm inside diameter options
• 500mm standard length
• Suitable for precision mechanical applications
• Available for machinery and automotive applications
• Custom dimensions can be discussed according to project requirements
• Material documentation and inspection available upon request

FAQ

Q1: What is a 42CrMo honed tube?

A: A 42CrMo honed tube is a precision alloy steel tube manufactured from 42CrMo material and finished by honing the internal bore to achieve improved dimensional accuracy and surface quality.

Q2: Is 42CrMo equivalent to 42CrMo4?

A: 42CrMo and 42CrMo4 are commonly considered comparable grades in different standard systems, but they are not automatically interchangeable. The applicable standard, chemical composition, heat treatment, and mechanical properties should be verified before substitution.

Q3: Is 42CrMo equivalent to AISI 4140?

A: AISI 4140 is commonly referenced as a comparable international grade to 42CrMo. However, the specific material requirements should be checked against the applicable standards before substitution.

Q4: What is the OD of this 42CrMo honed tube?

A: The standard outside diameter is 16mm.

Q5: What ID options are available?

A: The standard inside diameter range is 8.6–15mm. Other dimensions may be available according to production requirements.

Q6: What is the standard length?

A: The specified standard length is 500mm. Other lengths can be discussed according to customer requirements.

Q7: What applications are suitable for 42CrMo honed tubing?

A: Typical applications include machinery, automotive components, hydraulic equipment, precision mechanical assemblies, and engineering machinery.

Q8: Can you provide material certificates?

A: Material test certificates and inspection documentation can be provided according to the agreed order requirements and applicable material standard.