01 Wind Energy & Foundations
Anchor the load path before the tower rises.
JOTAIN can support alloy steel bar and processed-component routes for wind foundation anchorage, bolting, and rotating-part blanks when the purchaser defines the design basis, drawings, load inputs, and inspection plan.
Component catalogue / 01
Where we can enter the supply route
Start with the component, then define the material condition, processing boundary, inspection plan, and documentary release.
Anchor rods and cage material
Bar and prepared threaded material for purchaser-designed foundation assemblies.
- Raw or heat-treated bar
- Thread-ready preparation
- Cut length and marking
High-strength fastener bar
Alloy steel bar routes for purchaser-specified bolting and stud manufacture.
- QT bar
- Peeled bar
- Machining allowance
Shaft and pin blanks
Heat-treated, peeled, or rough-machined blanks for heavy rotating or articulated parts.
- Forged or rolled route
- QT condition
- UT when specified
Couplers, nuts, and prepared ends
Drawing-defined processed components subject to confirmed dimensions and acceptance criteria.
- Machining
- Thread route
- Protective finish when specified
Engineering conditions / 02
Define the service before the grade
The candidate route becomes meaningful only after load, environment, geometry, interfaces, and acceptance criteria are controlled.
Loading
Material selection follows the purchaser's fatigue and preload model.
- Design load spectrum
- Preload and relaxation
- Thread-root fatigue detail
Environment
Temperature and exposure affect toughness and protection requirements.
- Minimum service temperature
- Corrosion category
- Coating-related hydrogen risk
Interfaces
Thread, nut, coupler, template, and erection tolerances must be compatible.
- Thread standard and class
- Nut and coupler engagement
- Straightness and length tolerance
Material route / 03
Material selection boundary
Candidate routes are reviewed against section size, target properties, fatigue inputs, thread route, and the purchaser's approved specification.
| Grade | Condition | Why it enters review | Application guardrail |
|---|---|---|---|
| 42CrMo4 / 4140 | QT or prepared blank | Common high-strength, hardenable route for load-bearing parts. | Final suitability depends on section size and project requirements. |
| 34CrNiMo6 | QT or forged route | Higher hardenability and toughness route for heavy sections. | Use only when the purchaser's specification permits it. |
| 35CrMo | QT or thread-ready | Candidate fastener and threaded-component route. | Fastener class and assembly performance remain purchaser-defined. |
Processing sequence / 04
A route that can be inspected
- 01Bar or forging route
- 02Heat treatment
- 03Peeling or rough machining
- 04Thread preparation
- 05Protective finish when specified
- 06Final inspection and packing
Verification / 05
Evidence travels with the route
Define test location, acceptance criteria, inspection timing, marking, and release records before production.
Material identity
- Heat number traceability
- Chemical analysis record
- Delivery-condition record
Mechanical acceptance
- Tensile and hardness testing
- Impact testing when specified
- Test location defined by order
Geometry and integrity
- Thread and dimensional inspection
- Straightness
- UT or other NDT when specified
Standards context / 06
Reference the rule set—do not imply approval
The purchaser's approved drawing, project specification, inspection and test plan, and contractual standard editions control the order.
IEC 61400-6
Tower and foundation design context; purchaser and OEM requirements control material procurement.
Open reference ↗ISO 898-1
Fastener-property context within its stated dimensional and temperature scope.
Open reference ↗Technical enquiry / 07
Send an enquiry engineering can review.
Include these inputs to reduce assumptions, shorten technical clarification, and keep the proposed route inside the purchaser's design boundary.
- 01Component and drawing
- 02Design or procurement specification
- 03Grade or approved material list
- 04Diameter and length
- 05Thread standard and class
- 06Delivery condition
- 07Target mechanical properties
- 08NDT and inspection plan
- 09Surface protection
- 10Quantity and destination