National performance test standard for non-sparking tools

1.Performance test standard for beryllium copper non-sparking tools

(1)In the concentration of (21.0 ± 2.0)% hydrogen, do not detonate the gas after 20 drop weight tests, or in the concentration of (21.0 ± 2.0)% hydrogen, do 5 rotary friction tests within 1 second, do not detonate the gas.

(2)Standard code gbex Ⅱ C (no replaceable product)　

(3)Hardness hrc30-40, (hardness requirements vary according to different tools)　

(4)tensile strength δ b105-120kgf/mm2

(5)Beryllium bronze non-sparking tools have antimagnetic properties

2.Performance test standard for aluminum bronze non-sparking tools

(1)In the concentration of (7.8 ± 0.5)% ethylene, do not detonate the gas after 20 drop weight tests, or in the concentration of (7.8 ± 0.5)% ethylene, do 5 rotary friction tests within 1 second, do not detonate the gas.

(2)Standard code gbex Ⅱ B

(3)Hardness hrc20-30, (hardness requirements vary according to different tools)

(4)tensile strength δ b75-85kgf/mm2