以各种性质极不相同的材料(退火、予加应力、淬油与回火、淬水与回火及冷拉的不同碳鋼、不銹鋼、銅合金及各种鋁合金)进行拉力試驗和硬度試驗,作出每种材料的拉力、应力-应变曲綫图,从求得的硬度和抗拉强度中推导出关系式如下: T/H=0.72×(1+0.22σ_1/σ_(35))/(1+2.64σ_1/σ_(35))式中 T——抗拉强度(公斤/毫米~2); H——維氏硬度值; σ_1——延伸率为1%时之真应力(公斤/毫米~2); Tensile tests and hardness tests were conducted with various materials of very different properties (annealed, pre-stressed, quenched and tempered, different carbon steels hardened and tempered and cold drawn, stainless steel, copper alloy and various aluminum alloys) The relationship between tensile strength and tensile strength was derived from the obtained tensile and stress-strain curves of each material as follows: T / H = 0.72 × (1 + 0.22σ_1 / σ 35) / ( 1 + 2.64σ_1 / σ_ (35)) Where T - tensile strength (kg / mm ~ 2); H - Vickers hardness; σ_1 - true stress at 1% elongation ~ 2);