AISI 4140 steel is Chrome-Moly High Tensile Steel which has 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 high strength. AISI 4140 steel may be oil hardened to a relatively higher level of hardness with a tensile strength of 850 – DIN 1.7225 offers an excellent balance of strength,toughness and wear-resistance.In contrast to AISI 4130,it features a slightly higher carbon content which gives greater strength and heat treatment capabilities , however it is poor in weldability. Pre hardened and tempered 4140 can be further surface hardened by flame or induction hardening(can be surface hardened to a 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 be easily performed using the recommendations offered by the machine’s manufacturer for ideal tool type-feeds and speeds. AISI 4140 is often employed for many different 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 to be used within the output of weldable steel pressure vessels and industrial boilers. 16Mo3, that is supplied under the EN 10028 euro norm specification, is just one of these steels.
16Mo3 is actually a chrome molybdenum based steel that has excellent heat resistance and corrosion resistant characteristics. Because of this alone, the steel is a popular in the manufacture of pressurised vessels and boilers. The material offers good welding properties when utilizing conventional welding methods and because of the materials excellent heat resistance, 16Mo3 is also found in pipework for transporting hot liquids.
Added chromium within the steel boosts the corrosion resistance whilst the larger molybdenum content promotes the increase in effectiveness against elevated temperatures. 16Mo3 also has good hot and cold forming properties and it is normally delivered in ‘as rolled’ condition. Consideration ought to be made concerning the amount of tensile strength required before procuring AISI 4340 – whilst the fabric offers good overall tensile strength, this strength decreases as the temperature rises.
Equivalents with this steel grade can be obtained under both 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 comes with mill certification and stamping and further tests are normally supplied on the customers request. This can be done by vjrryg alternative party testing house or independently inspected from the customer.
The petrochemical industry sets very 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 usage of steel in these production plants with all the emphasis placed heavily on operational safety. Any material supplied must conform fully using the test criteria specified and such criteria varies dependent on the particular form of steel sought. Chrome Molybdenum is certainly one particular steel type that is popular in the industry.
About Chrome Molybdenum Steel – Also known as DIN 1.1191, this specific type of steel is used 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 for 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 degrees of chromium and molybdenum – the chromium offers the corrosion and oxidation resistance whilst the molybdenum offers heat resistance. It really is therefore clear to view why this kind of steel is popular inside the oil and gas industry where high working temperature in pressurized conditions are typical place.