Automotive Door Hinge Pins
We take a φ10 mm hinge pin as an example. The double shear failure load is ≥35 kN. This force can hold a heavy SUV or MPV door. We follow GB/T 13683 or ISO 3800 for axial fatigue testing. Under a cyclic load (load ratio R=0.1, max stress 500 MPa), the fatigue life is ≥5,000,000 cycles.
Hold Car Doors Steady with Our Door Hinge Pins
Do you make car door hinges? Car doors open and close every day. The hinge pin takes a lot of shock. If the pin is weak, the door will sag. Our Automotive Door Hinge Pins are grade 10.9 high load fasteners. They connect the upper and lower hinge parts. They let the door swing smoothly. We are a Shanghai factory. We have made fasteners for 20 years.
Check Our Shear Load Data and Fatigue Life
We take a φ10 mm hinge pin as an example. The double shear failure load is ≥35 kN. This force can hold a heavy SUV or MPV door. We follow GB/T 13683 or ISO 3800 for axial fatigue testing. Under a cyclic load (load ratio R=0.1, max stress 500 MPa), the fatigue life is ≥5,000,000 cycles. This is much higher than a car door design life (usually 100,000 cycles). The material is SCM435 or 40Cr high carbon steel. The strength grade is 10.9. Tensile strength is ≥1000 MPa. Yield strength is ≥900 MPa. Elongation is ≥9%. Hardness is HRC 32-39. The outer diameter tolerance is h7 or h8 (±0.010-0.022 mm). Surface roughness is Ra≤0.8 μm. We use high carbon steel SCM435, 40Cr, or ML40Cr. It gets heat treatment (quenching and high temperature tempering). This gives a tempered sorbite structure.
|
Parameter |
Standard / Value |
|
Double Shear Load (φ10mm) |
≥ 35 kN |
|
Fatigue Life (10.9 grade) |
≥ 5,000,000 cycles (ISO 3800) |
|
Tensile Strength (10.9 grade) |
≥ 1000 MPa |
|
Outer Diameter Tolerance |
h7 or h8 (±0.010-0.022 mm) |
Why Our Coating and Custom Options Work for You
The pin is cold headed or machined. After heat treatment, the pin deformation is ≤0.05 mm. No straightening is needed. The recommended fit gap between the pin and hinge hole is 0.05-0.10 mm. This gives smooth rotation and no noise. Surface finish is zinc-nickel alloy. The coating thickness is 8-15 μm. The nickel content is 12-15%. Neutral salt spray test per ASTM B117 gives ≥720 hours with no red rust. This is 5-10 times better than normal zinc plating. The zinc-nickel coating has a surface hardness of about HV 350-450. When it works with a hinge bushing (copper alloy or plastic), the wear rate is ≤0.01 mm per 100,000 cycles under dry friction. Our factory is in Shanghai Jiading. We have 2300 square meters and 20 workers. We started in 2006. That is 20 years now. We support custom orders. Length, head shape (flat, round, with snap ring groove), and end chamfer angle can follow your drawings. We passed IATF 16949:2016 certification.
The entire product line is fully customizable.
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