Frank Moore Cross Jr. and David Noel Freedman translate the Hebrew קֶֽשֶׁת־נְחוּשָׁ֖ה (KJV: "bow of steel") in 2 Samuel 22:35 as "bow of bronze."
Frank Moore Cross Jr. and David Noel Freedman, “A Royal Song of Thanksgiving: II Samuel 22 = Psalm 18,” Journal of Biblical Literature 72, no. 1 (March 1953): 31
Thou hast given me thy shield of victory, 36a
Along with the javelin and bow of bronze. 35b
Thy right hand upholds me, 36b
And thy favor makes me great.
Thou hast given me a long-striding legs, 37
And my ankles do not give way.
I pursue my enemies {I destroy I over take} them, 38
I do not turn back until I have annihilated them.