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34CrNiMo6

34CrNiMo6 / AISI 4340 / 1.6582 alloy steel round bar.

34CrNiMo6 is commonly reviewed for mechanical parts where toughness, fatigue resistance, and high-load application requirements need careful confirmation.

34CrNiMo6 / AISI 4340 / 1.6582 alloy steel round bar.

Route Decision

Review 34CrNiMo6 by shaft duty, section size, and inspection route

For 34CrNiMo6 / 4340 enquiries, treat the grade as one part of the route decision. Buyers should connect part duty, section size, QT condition, machining allowance, UT requirement, traceability, packing, and destination with the inquiry.

  • State whether the part is a heavy shaft, gear shaft, mining component, oil and gas part, or other load-bearing item
  • Confirm the required standard first, then list accepted cross-reference grades where applicable
  • Clarify QT, forged or hot rolled supply, rough machining, and final machining allowance
  • Add UT, MTC, heat number traceability, third-party inspection, packing, and destination details if specified

Standards

34CrNiMo6, 1.6582, and AISI 4340 cross-reference grades

Use the required project standard first because heavy-duty shaft and machinery parts often need precise chemistry, QT condition, mechanical targets, and inspection wording.

  • EN 34CrNiMo6 / 1.6582
  • AISI 4340
  • GB 34CrNiMo6
  • Project standard and acceptance criteria confirmed during RFQ review

Delivery Route

34CrNiMo6 QT condition, section size, and machining route

34CrNiMo6 buyers should state target condition, section size, machining allowance, rough or finish machining route, and any UT requirement for quotation review.

  • QT delivery support by order review
  • Forged or hot rolled supply route
  • Rough machining or precision machining
  • UT and third-party inspection if specified

Application Fit

34CrNiMo6 applications for heavy-duty shafts and load-bearing parts

34CrNiMo6 is commonly reviewed when toughness, fatigue resistance, hardenability, and high-load requirements are important for demanding mechanical components.

  • Heavy-duty shafts and gear shafts
  • Mining machinery components
  • Oil and gas equipment parts
  • Load-bearing industrial machinery components

Inspection / RFQ

Inspection and RFQ details for 34CrNiMo6 / 4340 round bar

Before quotation, state part type, grade standard, size, quantity, QT condition, mechanical-property target if specified, machining route, UT, MTC, traceability, packing, and destination.

  • Chemical composition and mechanical testing
  • UT requirement and acceptance criteria if specified
  • MTC, heat number traceability, and third-party inspection
  • Packing, marking, destination, and drawings when available

Production route

Start with a likely route

Use this page as a starting point. Load the route, then adjust each selection to match your order.

Starting point only. The exact route depends on grade, dimensions, application, specification, and order requirements.

  1. 01
    Heat treatmentQuenched and tempered
  2. 02
    Surface processingGround or rough-machined
  3. 03
    InspectionUT and dimensional checks
  4. 04
    PackingExport protection and marking
Load this route

Buyer Questions

34CrNiMo6 buyer questions before RFQ

What is 34CrNiMo6 / 4340 round bar used for?

34CrNiMo6 / 4340 round bar is commonly reviewed for heavy-duty shafts, gear shafts, mining machinery, oil and gas equipment, and load-bearing parts where toughness, fatigue resistance, and hardenability matter.

When should buyers choose 34CrNiMo6 instead of 42CrMo4?

Buyers often compare 34CrNiMo6 and 42CrMo4 when the part has heavier load, larger section size, tougher service, fatigue exposure, or stricter UT and mechanical-property requirements.

What should a 34CrNiMo6 RFQ include?

A 34CrNiMo6 RFQ should include part type, standard, diameter, length, quantity, QT condition, machining route, mechanical-property target if specified, UT or third-party inspection needs, packing, and destination.

Related Buying Guides

34CrNiMo6 buying guides and RFQ references

Shaft bar applicationsConnect 34CrNiMo6 grade review to shaft duty, size, machining route, and inspection needs.Wind, marine, and heavy machineryReview heavy-duty application routes where toughness, fatigue, packing, and documentation matter.Processing routesReview heat treatment, peeling, grinding, machining, straightening, and preparation routes before RFQ.Quality and documentsAlign MTC, heat number traceability, UT, third-party inspection, and shipment documentation expectations.34CrNiMo6 vs 42CrMo4 for shaftsCompare heavy-duty shaft routes by toughness, heat treatment, section size, and inspection needs.UT for steel round barsPrepare UT, acceptance criteria, traceability, and report expectations.Third-party inspection for steel barsPlan inspection scope, witness points, and shipment-release timing.Request a quoteSend 34CrNiMo6 grade, size, condition, inspection, packing, and destination details.42CrMo4 vs 4140 vs SCM440Compare grade naming and RFQ language for Cr-Mo alloy steel routes.Steel bar inspection requirements for RFQPrepare mechanical testing, UT, and document details.Hydraulic cylinder rod steel selectionReview rod grade selection where strength and toughness matter.MTC requirements for steel barsPrepare certificate, heat number, and inspection document requirements before RFQ.Heat number traceabilityConnect MTC, marking, packing list, and shipment document expectations.

FAQ

34CrNiMo6 quotation questions

Is 34CrNiMo6 the same as AISI 4340?

34CrNiMo6 and AISI 4340 are commonly reviewed as related Ni-Cr-Mo alloy steel routes, but buyers should specify the required standard first. Chemistry, condition, mechanical properties, and inspection requirements need order-specific review.

Why do 34CrNiMo6 buyers often mention UT inspection?

Heavy-duty shaft and load-bearing applications may require internal soundness review. If UT is required, the buyer should state the standard, acceptance criteria, report requirement, inspection timing, and third-party witness needs if applicable.

What delivery condition should be discussed for 34CrNiMo6?

34CrNiMo6 is commonly reviewed with QT condition for demanding parts, but the RFQ should state the required delivery condition, mechanical-property target, section size, machining allowance, surface route, and document requirements.

34CrNiMo6 Buyer Details

34CrNiMo6 / 4340 standards, QT condition, heavy-duty applications, and inspection points.

Review common cross-reference grades, strength and toughness data, QT delivery, shaft and heavy-machinery applications, and UT inspection needs.

Grade focus34CrNiMo6
Key pointReviewed for high load-bearing requirements when toughness, fatigue resistance, and application conditions are specified.
Suitable useWell suited to large shafts, gear shafts, and heavy machinery.
Review focusHigh-strength alloy steel for demanding industrial machinery.

34CrNiMo6 cross-reference grades

Cross-reference grades must be confirmed against the required project standard before quotation.

EN
34CrNiMo6 / 1.6582
ASTM
4340
GB
34CrNiMo6

34CrNiMo6 chemical composition

C
0.30 - 0.38
Si
0.15 - 0.40
Mn
0.50 - 0.80
Cr
1.30 - 1.70
Ni
1.30 - 1.70
Mo
0.15 - 0.30

34CrNiMo6 mechanical properties

Tensile strength
900 - 1100 MPa
Yield strength
≥ 750 MPa

34CrNiMo6 supply specifications

Diameter
20 - 400 mm
Length
3 - 12 m
Condition
QT
Heavy duty shafts
Gear shafts
Oil & gas equipment
Mining machinery components

34CrNiMo6 inspection points

  • Chemical analysis
  • Mechanical testing
  • UT inspection
  • Dimensional review

34CrNiMo6 manufacturing options

  • QT delivery support
  • Forged or hot rolled supply
  • Rough machining and precision machining
Detailed RFQ guidanceOpen details

34CrNiMo6 procurement summary

  • High-strength alloy steel for demanding industrial machinery.
  • The normalized content keeps the same technical intent as the source note while presenting it in a buyer-friendly format.

34CrNiMo6 technical overview

  • 34CrNiMo6 (EN 1.6582) is a high-strength alloy steel commonly reviewed where toughness, fatigue resistance, and high load-bearing requirements are specified for heavy-duty mechanical components.

34CrNiMo6 RFQ

Send a 34CrNiMo6 / 4340 round bar requirement for heavy-duty part review.

Include part type, target condition, diameter, length, quantity, inspection needs, machining route, and destination.

Request a Quote