Duty inputs
What controls the part
- Tensile load
- Long-bar straightness
- Machined or rolled thread route
- Connection ends
Component route 05
Tie Rod Steel Bar & Threaded Component Material
Alloy steel bar and drawing-led semi-finished rods for tie rods, tension-bar components and load-bearing threaded parts.
High-strength bar supply for threaded and load-bearing rod applications where thread-processing and finishing must be planned together.
Supply requirements
Alloy steel bars for tie rods and threaded components.
Material, supplied condition, thread route and connection details are reviewed from the purchaser's drawing.
- 01ComponentTie rod & threaded material
- 02Grade42CrMo4 / 4140
- 03ConditionHeat-treated bar
- 04InspectionTensile properties
- 05RFQDrawing + destination
Candidate grades
Material routes to review
- 42CrMo4 / 4140Primary alloy route for drawing-defined tension-bar components.
- 35CrMoPrimary route for drawing-led threaded-bar review.
- 40CrAlternative after tensile load and thread review.
- Project-specific routeConfirm assembly, thread and connection-end requirements.
Supply and release
Condition before quotation
- Supply stages
- Heat-treated bar · Thread-ready bar · Semi-finished rod
- Inspection
- Tensile properties · Long-bar straightness · Thread dimensions
Supply scope
Drawing-based tie rod and threaded-component supply.
We supply alloy steel bars and drawing-based semi-finished components for tie-rod and load-bearing threaded applications. Complete system design and installation are outside our supply scope.
Part Function
Tension bar and tie rod sourcing needs thread-route clarity
We supply alloy steel bars and drawing-based semi-finished components for tie rods and load-bearing threaded parts. The drawing should define tensile load, thread route, end connections, surface protection and inspection.
- Tie rod and threaded-component bars
- Drawing-based semi-finished rods and prepared ends
- Thread and mating-interface requirements
Material Choice
Common material routes for threaded and tension applications
Common starting routes include 42CrMo4 / 4140, 35CrMo and 40Cr, selected for the required strength, heat treatment, section and threading process. Project-specific grades can be reviewed from the drawing.
- 42CrMo4 / 4140 for higher-strength routes
- 35CrMo or 40Cr for drawing-matched routes
- Project-specific material with the required standard and condition
Production handoff
Bar preparation for threaded component production.
Available work can include heat treatment, long-bar preparation, machining or rolling, connection-end preparation and approved protective finishing.
- Heat treatment
- Long-bar preparation
- Machined or rolled thread route
- Connection-end preparation
Source imagery
Tie rod and threaded-component forms.
Examples show long bars, prepared ends, sleeves and other interfaces reviewed against project drawings.
Prepared bar forms for threading and load-bearing service.
Forged and machined end forms are reviewed against the purchaser's drawing.
Coupler forms are reviewed against thread dimensions and mating interfaces.
Fork and spade forms are reviewed against connection geometry and the purchaser's drawing.
Turnbuckle forms are reviewed against thread direction, adjustment range and interface dimensions.
Threaded accessory forms are reviewed against mating threads, interface dimensions and the purchaser's drawing.
RFQ checks
Common tie rod material questions.
Typical RFQs include drawings, grade or standard, supplied stage, thread details, surface protection, dimensions and inspection requirements.
Should buyers specify thread machining or thread rolling?
Yes. Thread machining and thread rolling have different preparation, allowance, and inspection implications. If the route is not decided, buyers should state the final part requirement so the route can be reviewed.
When is surface protection important for tension bars?
Surface protection should be discussed when the part is exposed to outdoor, marine, storage, or project-specific conditions. The RFQ should state coating, packing, destination, and document requirements if they apply.
Which documents are useful for load-bearing threaded parts?
Useful documents may include MTC, heat number traceability, dimensional inspection, mechanical or hardness verification if specified, coating or surface-protection records when applicable, and packing documents.
Technical references
Tie rod material, threading and inspection guides.
Practical guidance on material choice, thread preparation, connection details and inspection.
Post-tensioning bars and machined couplersSee PT bars, machined couplers, bolts and the drawing-based supply scope.Compare prestressing and post-tension bar routesDistinguish PT bar, ordinary rebar, and drawing-defined tie rod scope before selecting the standard and supplier boundary.Threaded rod and tie bar RFQ checklistPrepare thread details, grade, condition, inspection, protection, and destination.
Component RFQLock the route before quotation.
Send the part, grade or acceptable alternatives, size, condition, inspection scope, quantity and destination.