AISI 4140 steel is Chrome-Moly High Tensile Steel which includes a minimum of .8%Cr,.15%Mo as strengthening alloy elements.The chromium content provides good hardness penetration, and also the molybdenum content ensures uniform hardness and strength. AISI 4140 steel may be oil hardened to some relatively higher level of hardness using a tensile strength of 850 – 42CrMo4 offers an excellent balance of strength,toughness and wear-resistance.Compared with AISI 4130,it possesses a slightly higher carbon content that gives greater strength as well as heat treatment capabilities , nevertheless it is poor in weldability. Pre hardened and tempered 4140 can be further surface hardened by flame or induction hardening(may be surface hardened to your typical value 58HRC)and also by nitriding( Surface hardness achievable is 600 to 650HV).
AISI 4140 alloy steel has good machinability,operations including turning, hobbing, drilling, sawing, broaching, tapping and milling can easily be performed using the recommendations offered by the machine’s manufacturer for ideal tool type-feeds and speeds. AISI 4140 is often employed for a variety of applications inside the oil and gas ,aerospace,automotive, agricultural and defense industries.
Worldwide fabricators who supply the oil, gas and petrochemical industry, need the highest specification steels to use inside 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. 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 utilizing conventional welding methods and as a result of materials excellent heat resistance, 16Mo3 is also utilized in pipework for transporting hot liquids.
Added chromium within the steel raises the corrosion resistance whilst the greater molybdenum content promotes the increase 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 level of tensile strength required before procuring AISI 4340 – whilst the material offers good overall tensile strength, this strength decreases as the temperature rises.
Equivalents with this steel grade are available 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 with this type normally comes along with mill certification and stamping and further testing is normally supplied on the customers request. This can be done by vjrryg third 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 that is unsurprising considering that the working environment is potentially this type of hazardous one. The industry dictates quality standards for the use of steel within these production plants with all the emphasis placed heavily on operational safety. Any material supplied must conform fully using the test criteria specified etc criteria varies dependent on the particular form of steel sought. Chrome Molybdenum is certainly one particular steel type which is popular in the industry.
About Chrome Molybdenum Steel – Also referred to as DIN 1.1191, this specific type of steel is utilized for many different 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 use in elevated temperature environments. Corrosion & Oxidation Resistance- chrome moly offers excellent resistance to the effects of corrosion and oxidation.
The steel is produced at the steel mill with higher degrees of chromium and molybdenum – the chromium supplies the corrosion and oxidation resistance whilst the molybdenum offers heat resistance. It really is therefore clear to view why such a steel is popular inside the oil and gas industry where high working temperature in pressurized conditions are typical place.