Monel R405 Monel alloy R-405 (UNS N04405) the free-machining grade of alloy 400 has greater sulfur content enhances machinability than Monel 400.It has essentially the same corrosion resistance and physical properties as Monel alloy 400. But it is a slightly different range of mechanical properties. Monel alloy R405 is used chiefly for automatic screw machine stock. Specification：ASTM B 164. Monel alloy R405 chemical requirementsElementComposition limits, %Nickel63.0minCopper28min~34maxIron2.5maxManganese2.0maxCarbon0.3maxSilicon0.5maxSulfur0.025min-0.060max Monel R405 physical DataDensity0.318 lb / in38.80g/cm3Modulus of Elasticity26 000 ksiElectrical Resistance Tension5.11e-005 ohm-cmHeat Capacity0.427 J/g-°CThermal Conductivity22 W/m-°CMelting Point1300 - 1350 °CMagnetic permeability200H(At 70 F)Coefficient of Thermal Expansion, in./in./ F x 10670-200F7.770 - 400 F8.670 - 800 F8.970 - 1000 F9.1     Monel R405 Mechanical PropertiesForm and ConditionTensile StrengthYield Strength(0.2% Offset)Elongation,%HardnessksiMPaksiMPaBrinell(3000-kg)RockwellRod and Bar70-90482-62125-60172-41345-30110-17060-86 Monel alloy R-405 MachinabilityMonel R405 was mainly developed for good machinability and is recommended for use with automatic screw machines. High-speed tool steels should be used with oil base lubricants. Turning is done at speeds of 140-160 surface feet per minute with a feed rate of approximately 0.004 in./revolution. Drilling is done at 50-65 surface feet per min. with feed of 0.003 in./revolution. Monel R405 WeldingMonel R405 alloy may be joined by standard welding, Generally, processes and procedures are the same as for Monel 400.