... -40um) high crush strength (60000psi) low cost SN-Spheres are a series of separated products directly from ... Strength50000-90000psiFlammabilityNot combustibleMelting point1450oC approx.SolubilityNegligible in waterGrade SN-sphereSN-40SN-20SN-10SN-5SN-3Particle Size Range ... , boards, wires and lines, insulating devices, sole, conveyer belt, vehicle parts and bodies, fender-guard, etc;4) Construction ...