astm a193 grade b7 qt steel round bar  

quenched and tempered steel round bar astm a193 grade b7  Alloy steel astm a193 grade b7 / aisi 4140 / sae 4140 / 42CrMo4 material is considered as the most suitable for botls and nuts to be used at temperature below 450 degree C, with a minimum effect on its structural strength during application at a high temperature.   Advantages of astmastm a193 grade b7 / aisi 4140 / sae 4140 / 42CrMo4 qt steel round bar for gr 10.9 bolts we supply:  1): Smooth surface: Smooth surface without any cracks or scales 2): Good straightness: 1mm for hot rolled + QT bars and 0.5mm for cold drawn +QT bars 3): Uniform microstructure and mechanical properties 4): Anti-rusty packages: two layers packages and load in cntainer in our factory in case rusty and package damage. 5): Fast delivery time: Within two weeks if there is stock, within one month to customize.   Detailed astm a193 grade b7 / aisi 4140 / sae 4140 / 42CrMo4 steel specificatio…