40cr 5140Steel plate, 65Mn plate, astm1566, alloy steel plate

Short Description:

40Cr steel plate is one of the most widely used steels in mechanical manufacturing industry. After quenching and tempering, it has good comprehensive mechanical properties, good low-temperature impact toughness and low notch sensitivity. The hardenability of steel is good, and it can be quenched to Ф 28 ~ 60mm, which can be quenched to Ф 15～40mm。 In addition to quenching and tempering, this steel is also suitable for cyanidation and high frequency quenching. The cutting performance is good. When the hardness is hb174 ~ 229, the relative machinability is 60%. The steel is suitable for making medium-sized plastic molds.

Send email to us

Product Detail

Product Tags

Product Description

40Cr belongs to gb3077 "alloy structural steel". The difference is after heat treatment. The main function of Cr in heat treatment is to improve the hardenability of steel. Due to the improvement of hardenability, the mechanical properties such as strength, hardness and impact toughness of 40Cr after quenching (or quenching and tempering) treatment are also significantly higher than those of 45 steel. However, due to the strong hardenability, the internal stress of 40Cr during quenching is greater than that of 45 steel. Under the same conditions, the cracking inclination of 40Cr material is greater than that of 45 steel. Therefore, in order to avoid workpiece cracking, 40Cr quenching mostly uses oil with low thermal conductivity as the quenching medium (sometimes double liquid quenching method is also used, as the saying goes, water quenching oil cooling), while 45 steel uses water with high thermal conductivity as the quenching medium.

Product Parameter

Standerd	GB AISI, ASTM, DIN, EN, JIS
Steel pipe grade	40CR 41CR4 5140 SCR440
*Length width**	Customers' Requirement
Technique	hot rolled/cold rolled
Thickness	4mm-60mm
Processing Service	Cutting or according to the customer's demand
Packaging Details	Seaworthy export packing or as your requirement
Terms of Payment	T/T L/C at sight
20 feet container contains dimension	Length under 6000mm/25T
40 feet container contains dimension	Length under 12000mm/27T
Samples	Free samples are provided but the freight is paid by the buyer
Min order	1 Ton