AISI 4140 steel is Chrome-Moly High Tensile Steel which includes at the very least .8%Cr,.15%Mo as strengthening alloy elements.The chromium content provides good hardness penetration, as well as the molybdenum content ensures uniform hardness and strength. AISI 4140 steel may be oil hardened to a relatively higher level of hardness having a tensile strength of 850 – AISI 4140 offers an excellent balance of strength,toughness and wear-resistance.In comparison with AISI 4130,it has a slightly higher carbon content which provides greater strength and also heat treatment capabilities , nonetheless it is poor in weldability. Pre hardened and tempered 4140 may be further surface hardened by flame or induction hardening(can be surface hardened to a typical value 58HRC)and by nitriding( Surface hardness achievable is 600 to 650HV).
AISI 4140 alloy steel has good machinability,operations such as turning, hobbing, drilling, sawing, broaching, tapping and milling can easily be performed making use of the recommendations supplied by the machine’s manufacturer for ideal tool type-feeds and speeds. AISI 4140 is often used for a number of applications within the oil and gas ,aerospace,automotive, agricultural and defense industries.
Worldwide fabricators who provide you with the oil, gas and petrochemical industry, require the highest specification steels for use inside the output of weldable steel pressure vessels and industrial boilers. 16Mo3, which can be supplied beneath the EN 10028 euro norm specification, is one of these steels.
16Mo3 is actually a chrome molybdenum based steel that has excellent heat resistance and corrosion resistant characteristics. For these reasons alone, the steel is actually a popular within the manufacture of pressurised vessels and boilers. The material offers good welding properties when using conventional welding methods and as a result of materials excellent heat resistance, 16Mo3 is also found in pipework for transporting hot liquids.
Added chromium in the steel increases the corrosion resistance whilst the higher molybdenum content promotes the rise in resistance to elevated temperatures. 16Mo3 even offers good hot and cold forming properties and it is normally delivered in ‘as rolled’ condition. Consideration should be made concerning the degree of tensile strength required before procuring AISI 4340 – whilst the material offers good overall tensile strength, this strength decreases since the temperature rises.
Equivalents for this particular steel grade can be found under the ASTM and ASME steel specifications for chrome moly (A387 and SA387 respectively). 16Mo3 can also be extensively employed by the inshore and offshore industry. Material of the type normally includes mill certification and stamping and further testing is normally supplied on the customers request. This can be done by vjrryg 3rd party testing house or independently inspected through the customer.
The petrochemical industry sets extremely high demands for carbon steel grades used in their production facilities which is unsurprising considering the fact that the working environment is potentially this type of hazardous one. The business dictates quality standards for the usage of steel within these production plants with all the emphasis placed heavily on operational safety. Any material supplied must conform fully with all the test criteria specified and such criteria varies dependent on the particular type of steel sought. Chrome Molybdenum is certainly one particular steel type that is popular within the industry.
About Chrome Molybdenum Steel – Also called AISI 1045, this kind of type of steel is utilized for a number of purposes such as the fabrication of industrial boilers and pressure vessels. Chrome Moly has two key advantages. High temperature tensile strength – chrome moly is an ideal material for use in elevated temperature environments. Corrosion & Oxidation Resistance- chrome moly offers excellent potential to deal with the consequences of corrosion and oxidation.
The steel is produced on the steel mill with higher levels of chromium and molybdenum – the chromium provides the corrosion and oxidation resistance whilst the molybdenum offers heat resistance. It is therefore clear to see why this type of steel is popular inside the oil and gas industry where high working temperature in pressurized conditions are typical place.