D15 / D20 Yüksek Mukavemetli Çekme Çubukları

Name: D15 / D20 Yüksek Mukavemetli Çekme Çubukları
Brand: Qianheng Fastener
Availability: InStock

D15 ve D20 kalıp çekme çubukları, 8.8 / 10.9 sınıf, siyah oksit veya galvanizli.

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D15 / D20 Yüksek Mukavemetli Çekme Çubukları

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D15 / D20 Yüksek Mukavemetli Çekme Çubukları

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.

Özellikler

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

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Teknik Özellikler

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

MalzemeD15/D20: Q235 · 45# · 40Cr (selectable by load)

Yüzey İşlemiPlain (black) · Electro-galvanized · Hot-dip galvanized · Dacromet

Nominal YükD15: 150 kN rated · D20: 230 kN rated (up to 430 kN on D25/D26.5 sets)

Birim AğırlıkD15: 1.5 kg/m · D20: 2.6 kg/m

PaketlemeBundled on pallet · VCI wrap · seaworthy cartons · marked per BOM

Üretim Süreci

**Cutting & forming**Bar cutting, cold heading and plate forming to drawing dimensions.

**CNC thread rolling**Rolled threads for fatigue strength and consistent pitch diameter.

**Heat treatment**Quenching and tempering for class 8.8 and above, with process records.

**Surface treatment**Black oxide, zinc plating or hot-dip galvanizing to the specified thickness.

**Gauge & batch test**Thread gauging, hardness and tensile checks with batch test reports.

**Packing & marking**Set or BOM packing, VCI protection and seaworthy crates.

Malzeme Sınıfları Açıklaması

Sınıf	Notlar
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.