AISI 4140 steel is Chrome-Moly High Tensile Steel that has 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 could be oil hardened to some relatively higher level of hardness using a tensile strength of 850 – 42CrMo4 offers a really good balance of strength,toughness and wear-resistance.In comparison with AISI 4130,it has a slightly higher carbon content that gives greater strength and heat treatment capabilities , nevertheless it is poor in weldability. Pre hardened and tempered 4140 can be further surface hardened by flame or induction hardening(could be surface hardened to some typical value 58HRC)and 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 be easily performed making use of the recommendations offered by the machine’s manufacturer for ideal tool type-feeds and speeds. AISI 4140 is commonly employed for many different applications within 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 in the creation of weldable steel pressure vessels and industrial boilers. 16Mo3, that is supplied under the EN 10028 euro norm specification, is one of these steels.
16Mo3 is a chrome molybdenum based steel that has excellent heat resistance and corrosion resistant characteristics. Therefore alone, the steel is actually a well known in the manufacture 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 used in pipework for transporting hot liquids.
Added chromium in the steel boosts the corrosion resistance whilst the larger molybdenum content promotes the rise in potential to deal with elevated temperatures. 16Mo3 even offers good cold and hot forming properties and is normally delivered in ‘as rolled’ condition. Consideration should be made concerning the level of tensile strength required before procuring DIN 1.6565 – whilst the material offers good overall tensile strength, this strength decreases since the temperature rises.
Equivalents with this steel grade are available under both ASTM and ASME steel specifications for chrome moly (A387 and SA387 respectively). 16Mo3 is additionally extensively employed by the inshore and offshore industry. Material with this type normally comes along with mill certification and stamping and additional tests are normally supplied on the customers request. This can be achieved by vjrryg 3rd party testing house or independently inspected from the customer.
The petrochemical industry sets extremely high demands for carbon steel grades found in their production facilities which can be unsurprising given that the working environment is potentially such a hazardous one. The industry dictates quality standards for the usage of steel during these production plants with all the emphasis placed heavily on operational safety. Any material supplied must conform fully with the test criteria specified and such criteria varies dependent on the particular type of steel sought. Chrome Molybdenum is just one particular steel type that is popular inside the industry.
About Chrome Molybdenum Steel – Also known as DIN 1.1191, this specific form of steel can be used for many different 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 to be used 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 levels 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.