Steel Wire Rope Selection – Understanding Tensile Strength from 1570 to 2160 MPa

Statistics show that more than 60% of lifting accidents are directly related to improper wire rope selection. For both purchasing staff and project managers, choosing the right rope can often be confusing. With many models available, technical data full of numbers, and significant price differences in the market, many buyers wonder: which rope should I trust?

Common Tensile Strength Grades

Wire Ropes are classified by tensile strength, measured in MPa. The most common grades are:

1570 MPa – Economical and suitable for light-duty work, such as ordinary construction lifting of materials and equipment.

1770 MPa – The most widely used general-purpose grade, applied in factories, logistics, and medium lifting operations.

1960 MPa – High-strength type, ideal for heavy loads like bridge construction, steel beams, and port handling of oversized cargo.

2160 MPa – Ultra-high strength, required in extreme cases such as core lifting in super high-rise buildings or specialized scientific installations.

Key Factors in Selection

Application Scenario

Standard lifting equipment (tower cranes, factory cranes): 1770 MPa is generally sufficient, though 1960 MPa may be used for added reliability.

Heavy-duty equipment (port gantry cranes, mining hoists): 1960 MPa is recommended. In some cases, 1770 MPa may be acceptable after safety evaluation.

Special industries (aerospace, deep-sea): 2160 MPa may be necessary, but higher strength comes with increased brittleness, so careful design and testing are required.

Environmental Conditions

Dry environments: 1770–1960 MPa ropes are effective.

Corrosive environments (marine, chemical plants): 1570–1770 MPa is safer, as higher-strength wires are prone to hydrogen embrittlement.

High temperatures: Use heat-resistant ropes; tensile strength can be moderately reduced to ensure stability.

Load Requirements

Light load: 1570–1770 MPa.

Heavy load: 1960 MPa with a safety factor ≥ 5.

Extreme load: 2160 MPa, but strict monitoring is essential.

By considering strength grade, environment, and load, users can avoid common pitfalls and ensure both safety and cost-effectiveness in wire rope selection.