GB/T 43357-2023 in English

This standard systematically specifies the test methods for 39 performance parameters of wire ropes, including testing systems such as geometric properties, mechanical properties, durability and material analysis, and is applicable to quality control and acceptance of various types of wire rope products.

1. Breaking tensile test

A three-level loading system is adopted: initial load ≤3%F_min→gradual loading until fracture, and the effective gauge length is set in sections according to the diameter of the wire rope:

• D≤6mm: ≥200mm
• 6＜D≤20mm: ≥500mm
• D＞20mm: ≥1000mm

2. Elastic modulus determination

Distinguish between three state moduli:

1. Initial elastic modulus E_i: measured in the first loading range of 10%-30%F_min
2. Stable elastic modulus E_f: measured after ≥50 load cycles
3. Calculation formula: E=L₀×(F_30%-F_10%)/[S₀(x₂-x₁)]

Specimen Preparation Specifications

When cutting specimens, the ends must be tied to prevent loosening. When straightening the stranded wire, a wooden/rubber hammer should be used to avoid thermal damage.

Dispute handling principles

When there is a dispute over geometric parameters such as diameter and out-of-roundness, it is necessary to retest under 5%F_min tension; if the fracture position of the breaking tensile test does not meet the requirements of GB/T 8358, it should be retested.

Data rounding rules

According to YB/T 081: Breaking tensile <10kN is rounded to 0.01kN, 10-100kN is rounded to 0.1kN, ≥1000kN is rounded to 10kN.