D15 / D20 High-Strength Tie Rods
High-strength formwork tie rods in D15 and D20, 8.8 / 10.9 grades, black oxide or galvanized.
Factory Direct
CNC In-House
Batch QC Reports
OEM to Drawing
1 / 3Tie Rods & Water Stop Rods
D15 / D20 High-Strength Tie Rods
Produced on CNC thread-rolling lines for burr-free threads and consistent geometry. DW15 (15mm root / 17mm outer thread, 7.5mm pitch) carries approximately 150 kN allowable tension, while Rd20 reaches approximately 230 kN. Threads follow DIN 976, A193 B7 or GB/T 15389; materials range from Q235 to 45#, 40Cr and 20MnTiB with plain, electro-galvanized, hot-dip galvanized or Dacromet finishes.
Specifications
- DW15 and Rd20 all-thread bars
- D15 ≈150 kN / D20 ≈230 kN allowable tension
- Length 200–9000mm, cut to length
- Q235 / 45# / 40Cr / 20MnTiB
- DIN 976 / A193 B7 / GB/T 15389 threads
- Plain, electro-galvanized, HDG or Dacromet
Engineering-reviewed quote within 24 hours.
Technical Specifications
| Thread | DW15 (15mm root / 17mm OD, 7.5mm pitch); Rd20 |
| Load Rating | ~150 kN (D15) / ~230 kN (D20) allowable tension |
| Grades | 4.8 / 8.8 / 10.9 per ISO 898-1 |
| Material | Q235 / 45# / 40Cr / 20MnTiB |
| Length | 200–9000mm, custom cut-to-length |
| Surface | Plain, electro-galvanized (8–25µm), HDG (45–85µm), painted, Dacromet |
| Packaging | Bundled on pallet, VCI wrap, seaworthy cartons |
MaterialD15/D20: Q235 · 45# · 40Cr (selectable by load)
Surface FinishPlain (black) · Electro-galvanized · Hot-dip galvanized · Dacromet
Rated LoadD15: 150 kN rated · D20: 230 kN rated (up to 430 kN on D25/D26.5 sets)
Unit WeightD15: 1.5 kg/m · D20: 2.6 kg/m
PackagingBundled on pallet · VCI wrap · seaworthy cartons · marked per BOM
Production Process
01
02
03
04
05
06Material Grades Explained
| Grade | Notes |
|---|---|
| Q235 | Plain carbon steel. Economic option for light and medium formwork loads. Not heat treated. |
| 45# | Medium carbon steel. The standard formwork tie rod grade in China; quenchable to class 8.8. |
| 40Cr | Alloy steel. Higher hardenability and better fatigue performance than 45#; used where repeated reuse matters. |
| Class 10.9 bolt | Quenched and tempered alloy steel bolt used in the climbing cone set. Not electroplated without a documented baking cycle. |
| QT450-10 | Ductile (nodular) iron with 450 MPa tensile and 10% elongation. Used for sleeves and embedded plates where toughness and castability matter. |
| HRB400 | Hot-rolled ribbed bar (threaded steel) to Chinese standard. Used for embedded foot bolts; good bond with concrete. |
Applications
Procurement Guide
- Confirm rod diameter and required load class with your structural engineer
- Match cone, sleeve and wing nut threads to the rod before ordering
- Request mill certificates (EN 10204 3.1) for structural applications
- For outdoor or aggressive environments, specify HDG 45–85µm or Dacromet
Procurement Information
- OEM / Custom
- Own drawing or label welcome
- MOQ
- Trial orders OK · mixed SKU welcome
- Lead time
- Stock 7-30d · Custom 20-35d
- Packaging
- Seaworthy: pallet + strapping + waterproof
- Payment
- T/T · L/C at sight
- Incoterms
- FOB Tianjin · CIF · CFR · EXW
Related Technical Reading
Related Products
Technical FAQ
D15 / D20 High-Strength Tie Rods — Answers for Engineers and Buyers
Standard diameters cover D15 and D20, with bar length cut to the wall thickness plus the required allowance for nuts, plates and walers. Non-standard diameters and lengths can be produced to drawing.