HEAVY DUTY MORTAR & PESTLE. HAS A MACHINED BULLNOSE BOTTOM. Packed weight 5.2KG. 140mm High x 90mm O. Spheroidal Graphite Cast Iron. Grey iron and ductile iron are differentiated by the type and structure of the carbon present in them. Ductility is determined by a greater percentage of elongation under tension. The addition of magnesium in ductile iron means that the graphite has a nodular/spherical shape conferring higher strength and ductility as opposed to grey iron which is flake shaped. For example, 18% elongation can be easily achieved with ASTM A395 and A536 grades 60-40-18 material. Tensile and Yield Strength. There are certainly differences when it comes to tensile and yield strength of grey and ductile iron. Ductile iron has a minimum tensile strength of 60,000 psi and minimum yield strength of 40,000 psi. There are many grades of grey iron as per the ASTM A48 standard. While grey iron does not have measurable yield strength, the range for tensile strength is 20,000 psi – 60,000 psi. Ductile iron has a greater resistance to impacts, and is able to resist a minimum of 7 foot pounds of impact (versus 2 pounds of impact for grey iron). Ductile iron has a lower thermal conductivity than grey iron. Grey iron dampens vibrations more effectively than ductile iron. Grey iron can be cast very easily and has good machinability. It is typically used in the following. Applications where strength is not the main required property. Our Mortar and Pestles are designed by an Engineer with impact as the number one goal and Finish, these are not rough sand finished there been matched internally and externally. The Bottom is machined with an even flow radius for even drop when in use for maximum efficiency , deigned to be under 5KGS , we can send these anywhere in Australia. We recommend you use by Hand in a up down motion. I have had one sample unit for 6 months and have used it with a mash Hammer only wear at this point is the top of the Pestle where it has flatted out but BEST used by hand, any normal pestle with have broken by now and the Mortar crack. In my option the best Mortar & pestle ever developed. You get what you pay for. WE TRADE AS LPR TOOLMAKERS. This item is in the category “Industrial\Heavy Machinery, Parts & Attachments\Heavy Machinery\Mining Equipment”. The seller is “seekz1717″ and is located in this country: AU. This item can be shipped worldwide.

• Product Type: hobby mining
• Brand: APRICA PTY AUSTRALIAN DESIGNED
• Equipment Type: Hammer Crusher