Hello guys I will show how create a 3dsmax 3d hard hat model tutorial.
I have used following techniques shown below in this 3ds max tutorial.
[1]-Click on the Sphere button and create a sphere with the following size
Place like me
[2]-Switch to the line button and now create following shape like me 
[3]-Now apply the extrude modifier with the amount of 2.5
[4]-Create Chamfer box and apply the bend modifier with the following parameter as shown below 
[5]-Place the chamfer box like me 
[6]-Ceate four more chamfer box and place like this
[7]-This is my material 
[8]-Set the skylight like this with the following parameter
[11]-This is final image