41Cr4 Low Alloy Seamless Precision Steel Round Tube for Engineering

Material

41Cr4 (EN 1.7035) is a heat-treatable Cr-alloy steel commonly supplied in quenched & tempered (+QT) condition for engineering components that require a strong strength–toughness balance, stable hardenability, and reliable machining performance.

Specifications

• Product form: Seamless precision round tube (cold-drawn / cold-rolled as required)

• Delivery condition (typical options): +C / +LC (cold-finished), +SR (stress relieved), +A (annealed), +N (normalized), +QT (quenched & tempered)

• Dimensional & geometric requirements: Tight OD/ID/wall tolerances, concentricity, and straightness can be agreed (including reduced tolerances as options).

• Surface quality: Surface condition and roughness measurement can be specified as a purchasing option.

• Inspection & NDT options: Longitudinal imperfection NDT and leak-tightness verification can be specified; NDT personnel qualification requirements are stated.

Key Features

• High strength with good toughness after +QT heat treatment (well-suited for dynamic loads and fatigue-sensitive parts).

• Good hardenability and heat-treatment response, supporting consistent properties through section thickness in many engineering sizes.

• Precision-ready geometry from cold finishing for efficient machining and predictable fit-up in assemblies.

Our Advantages

1. “Can you guarantee tight tolerances and surface finish for automated machining?”
   Yes. Precision tube supply can follow EN 10305-1 options for reduced diameter/wall tolerances and even concentricity control, and roughness measurement can be specified contractually—ideal for CNC/robotic production lines.

2. “How do you ensure property consistency lot-to-lot?”
   We control steel chemistry and heat-treatment routes (+QT / +SR / +N as agreed) and verify by tensile testing, dimensional inspection, and (when required) NDT per EN 10305-1 inspection/testing structure.

3. “What documents and traceability will we receive for audits?”
   We can provide inspection documentation aligned with EN 10204 pathways referenced in EN 10305-1 (e.g., test report 2.2 by default; 3.1 certificates when specific inspection is requested), including chemistry and mechanical test identifiers for traceability.

Chemical Composition 

Mechanical Properties 

Standards 

• EN (Precision & engineering tubes): EN 10305-1 (precision cold-drawn tubes; tolerances, options, inspection framework).
  EN (Material family): 41Cr4 is typically referenced under EN heat-treatable alloy steel systems (e.g., EN/ISO 683-2 family in datasheet practice).

• ASTM (Mechanical tubing): ASTM A519 (seamless carbon & alloy steel mechanical tubing, hot-finished or cold-finished).

• GOST (Alloy structural steels): GOST 4543-2016 (structural alloy steel products—specifications).

• JIS (Alloy steels system): JIS G 4053 (low-alloyed steels for machine structural use; note: the document states it is not applicable to steel tubes and points to JIS tube standards separately).

• GB (Alloy structural steels / precision tubes): GB/T 3077 (Alloy structure steels) and GB/T 3639 (seamless cold-drawn or cold-rolled steel tubes for precision applications).

Application Areas

Typical industries: mechanical engineering, automotive components, hydraulics & power transmission, general machinery.

Where the tube is used (examples):

• Power transmission: shafts, torque tubes, couplings, spline sleeves (high torsional strength need).

• Machinery structures: precision bushings, sleeves, spacers, structural members requiring tight ID/OD fit.

• Tooling & wear parts: rollers, pins, guides (often with +QT then machining; optional surface hardening depending on design).

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,

it is according to quantity.

Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

If you have another question, pls feel free to contact with me.