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Minimum breaking strength in tons of 2000 lbs Actual strand construction varies by diameter.
For example, 3/8-3/4"" is typically 7x7, 1"" is typically 6x25.

Warning: Wire rope & aircraft cable should never be used at breaking strength. 10:1 safety factor minimum is recommended for critical/overhead application. Do not use for overhead lifting without consulting a wire rope rigging professional. End fittings may not hold to 100% of strength efficiency so a safety factor such as 5:1 should be divided into the assembly actual strength. A pull test is recommended for quality assurance.
ASTM A603
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Item #

Dia (in)

Class A Coating Throughout

Class A Coating Inner Wires/ Class B Coating Outer Wires

Class A Coating Inner Wires/ Class C Coating Outer Wires

Class C Coating Throughout

ASTM603-2 7/8 N/A 2 7/8 N/A 379 N/A 372 N/A 365 N/A 344
ASTM603-3 N/A 3 N/A 412 N/A 405 N/A 397 N/A 374
ASTM603-3 1/4 N/A 3 1/4 N/A 475 N/A 466 N/A 457 N/A 432
ASTM603-3 1/2 N/A 3 1/2 N/A 555 N/A 545 N/A 534 N/A 504
ASTM603-3 3/4 N/A 3 3/4 N/A 640 N/A 628 N/A 616 N/A 582
ASTM603-4 N/A 4 N/A 730 N/A 717 N/A 703 N/A 664
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