AISI 4140 steel is Chrome-Moly High Tensile Steel that has 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 strength. AISI 4140 steel could be oil hardened to some relatively high level of hardness having a tensile strength of 850 – 42CrMo4 offers a very good balance of strength,toughness and wear-resistance.In comparison with AISI 4130,it features a slightly higher carbon content which provides greater strength and also heat treatment capabilities , nevertheless it is poor in weldability. Pre hardened and tempered 4140 could 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 like turning, hobbing, drilling, sawing, broaching, tapping and milling can be simply performed using the recommendations provided by the machine’s manufacturer for ideal tool type-feeds and speeds. AISI 4140 is normally used for many different applications in the oil and gas ,aerospace,automotive, agricultural and defense industries.
Worldwide fabricators who provide the oil, gas and petrochemical industry, require highest specification steels to be used within the creation of weldable steel pressure vessels and industrial boilers. 16Mo3, which is supplied underneath the EN 10028 euro norm specification, is among 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 in the manufacture of pressurised vessels and boilers. The content offers good welding properties when utilizing conventional welding methods and due to the materials excellent heat resistance, 16Mo3 is also used in pipework for transporting hot liquids.
Added chromium in the steel boosts the corrosion resistance whilst the greater molybdenum content promotes the rise in resistance to elevated temperatures. 16Mo3 also offers good cold and warm forming properties and is normally delivered in ‘as rolled’ condition. Consideration should be made concerning the amount 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 particular steel grade can be found under the ASTM and ASME steel specifications for chrome moly (A387 and SA387 respectively). 16Mo3 is also extensively utilized by the inshore and offshore industry. Material of this type normally includes mill certification and stamping and further tests are 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 utilized in their production facilities which is unsurprising given that the working environment is potentially such a hazardous one. The industry dictates quality standards for the use of steel in these production plants with all the emphasis placed heavily on operational safety. Any material supplied must conform fully with all the test criteria specified etc criteria varies dependent on the particular type of steel sought. Chrome Molybdenum is one particular steel type that is popular inside the industry.
About Chrome Molybdenum Steel – Also known as DIN 1.1191, this specific kind of steel is utilized for a variety of purposes like the fabrication of industrial boilers and pressure vessels. Chrome Moly has two key advantages. High temperature tensile strength – chrome moly is a great material to be used in elevated temperature environments. Corrosion & Oxidation Resistance- chrome moly offers excellent resistance to the consequences of corrosion and oxidation.
The steel is produced in the steel mill with higher degrees of chromium and molybdenum – the chromium provides the corrosion and oxidation resistance whilst the molybdenum offers heat resistance. It is actually therefore clear to find out why this type of steel is popular inside the oil and gas industry where high working temperature in pressurized conditions are typical place.