The phrase "a strength of about" is correct and usable in written English.
It can be used when discussing the approximate magnitude or intensity of a particular strength or force in various contexts, such as scientific, technical, or descriptive writing.
Example: "The material has a strength of about 300 megapascals, making it suitable for construction purposes."
Alternatives: "an approximate strength of" or "a strength estimated at".
This brought it down to a strength of about 5,000 men, approximately half the strength it had when the war began.
Hydrogen bonds, with a strength of about 5 kilocalories (21 kilojoules) per mole, are much weaker than normal covalent bonds, with bond energies of about 70 to 110 kilocalories per mole.
From a height of 120 kilometers, the anomalies have a strength of about 400 nanoteslas--about 40 times stronger than any such anomalies on Earth.
The twinning induced plasticity steel 0.6 C–18 Mn–1.5 Al (wt.%) employed in this study exhibited a strength of about 1 GPa, combined with a large uniform elongation of over 60% at moderate strain rates.
The (PE/TiO2 4 nanocomposite has a strength of about 245 MPa, being close to that of the natural shell, while the fracture toughness of the nanocomposite, KIC = 1.62 ± 0.30 MPa · m1/2, is evidently higher than that of the single TiO2 of about 400 nm thick.
The composite consisting of 17.9-nm-thick nanocrystalline TiO2 and 16.4-nm-thick amorphous PE layers has a strength of about 245 MPa, which is close to that of shells, while the fracture toughness of the composite, KIC = 1.62 ± 0.30 MPa · m1/2, is evidently higher than that of the bulk TiO2.
The HSC mix presented a compressive strength of about 130 MPa, with a basalt coarse aggregate.
An ultimate tensile strength higher than 650 MPa, a yield strength of about 600 MPa and a Vickers micro hardness HV0.2 higher than 220 were obtained, values which compare quite favorably with those corresponding to a classically forged material.
The U.S. Army underwent an enormous expansion during the Civil War (1861 65), growing from a peacetime strength of about 16,000 officers and men in December 1860 to a maximum size of 1,000,000 by 1865.
Since the bulk of living organisms is composed of diamagnetic material, mostly water, organisms can be magnetically levitated, requiring BB' to be equal to about 1400 T/m, which in commonly used magnets occurs at a field strength of about 16 T.
A scratch test conducted on the coating revealed an adhesion strength of about 160 mN.
