AISI 4140 steel is Chrome-Moly High Tensile Steel which includes at 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 high strength. AISI 4140 steel could be oil hardened to your relatively higher level of hardness using a tensile strength of 850 – DIN 1.7225 offers an excellent balance of strength,toughness and wear-resistance.In comparison with AISI 4130,it features a slightly higher carbon content which provides greater strength as well as heat treatment capabilities , however it is poor in weldability. Pre hardened and tempered 4140 may be further surface hardened by flame or induction hardening(may be surface hardened to some typical value 58HRC)and also 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 utilizing the recommendations provided by the machine’s manufacturer for ideal tool type-feeds and speeds. AISI 4140 is commonly employed for a number of applications in the oil and gas ,aerospace,automotive, agricultural and defense industries.
Worldwide fabricators who supply the oil, gas and petrochemical industry, require the highest specification steels to use within the output of weldable steel pressure vessels and industrial boilers. 16Mo3, which can be supplied underneath the EN 10028 euro norm specification, is just one of these steels.
16Mo3 is actually a chrome molybdenum based steel which has excellent heat resistance and corrosion resistant characteristics. Therefore alone, the steel is a well known within the creation of pressurised vessels and boilers. The content offers good welding properties when using conventional welding methods and due to the 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 cold and hot forming properties and is also normally delivered in ‘as rolled’ condition. Consideration should be made concerning the level of tensile strength required before procuring EN24 – whilst the material offers good overall tensile strength, this strength decreases as the temperature rises.
Equivalents for this steel grade can be found under the ASTM and ASME steel specifications for chrome moly (A387 and SA387 respectively). 16Mo3 is additionally extensively used by the inshore and offshore industry. Material of the type normally includes mill certification and stamping and additional tests are normally supplied on the customers request. You can do this by vjrryg 3rd party testing house or independently inspected by the customer.
The petrochemical industry sets extremely high demands for carbon steel grades used in their production facilities which can be unsurprising given that the working environment is potentially this type of hazardous one. The industry dictates quality standards for using steel during these production plants with the emphasis placed heavily on operational safety. Any material supplied must conform fully with all the test criteria specified and the like criteria varies dependent on the particular kind of steel sought. Chrome Molybdenum is just one particular steel type which can be popular within the industry.
About Chrome Molybdenum Steel – Also called DIN 1.1191, this kind of type of steel can be used for a variety 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 a perfect material to use in elevated temperature environments. Corrosion & Oxidation Resistance- chrome moly offers excellent potential to deal with the results of corrosion and oxidation.
The steel itself is produced in the steel mill with higher levels of chromium and molybdenum – the chromium supplies the corrosion and oxidation resistance whilst the molybdenum offers heat resistance. It is actually therefore clear to see why such a steel is popular within the oil and gas industry where high working temperature in pressurized conditions are common place.