Good weldability. The design principle of weldability of API 5L PSL1 X42 line pipe steel is actually the control of martensite point (MS) and maximum martensite hardness (HVmax). Usually, the weldability level of pipeline steel is assessed by welding carbon equivalent (CEQ) and welding crack sensitivity coefficient (PCM) of steel.Due to the harsh conditions of field pipeline laying and the technological level of pipe making, we strive for the high quality of weld.

API 5L PSL1 X42 line pipe Shanghai inventory: 12.9*2987*10384, 15*2200*10270, 14*1950*10600, 320*2200*4250, 32*2500*6000, 14*2200*10030, 65*3010*8230, 16*2100*10650, 36*2200*12000, 12.9*2987*10384, 14*1950*10900, 25*2500*12000, 15*2200*10270, 20*2620*11800, 14*1950*10450, 30*2200*12000, 14*2200*10030, 20.9*2851*7000, 20*2933*7300, 14*1950*10500, 50*2200*12000, 31.9*2920*9420, 20*2933*7300.

Composition characteristics of API 5L PSL1 X42 line pipe product: (1) Low carbon: Due to high requirements for toughness, weldability and cold formability, its carbon content does not exceed 0.20%. 2) Add manganese-based alloying elements. 3) Adding auxiliary elements such as niobium, titanium or vanadium: a small amount of niobium, titanium or vanadium forms fine carbides or carbonitrides in the steel, which is beneficial to obtain fine ferrite grains and improve the strength and toughness of the steel.

The tempering of API 5L PSL1 X42 line pipe steel plate, the hardened steel will be reheated to a certain temperature, and then a certain method of cooling is called tempering.Its purpose is to eliminate the internal stress caused by quenching, reduce hardness and brittleness, so as to achieve the desired mechanical properties. Tempering is divided into three types: high temperature tempering, medium temperature tempering and low temperature tempering.Tempering and quenching, with the use of normalizing.

Good weldability. The design principle of weldability of API 5L PSL1 X42 line pipe steel is actually the control of martensite point (MS) and maximum martensite hardness (HVmax). Usually, the weldability level of pipeline steel is assessed by welding carbon equivalent (CEQ) and welding crack sensitivity coefficient (PCM) of steel.Due to the harsh conditions of field pipeline laying and the technological level of pipe making, we strive for the high quality of weld.

API 5L PSL1 X42 line pipe Shanghai inventory: 12.9*2987*10384, 15*2200*10270, 14*1950*10600, 320*2200*4250, 32*2500*6000, 14*2200*10030, 65*3010*8230, 16*2100*10650, 36*2200*12000, 12.9*2987*10384, 14*1950*10900, 25*2500*12000, 15*2200*10270, 20*2620*11800, 14*1950*10450, 30*2200*12000, 14*2200*10030, 20.9*2851*7000, 20*2933*7300, 14*1950*10500, 50*2200*12000, 31.9*2920*9420, 20*2933*7300.

Composition characteristics of API 5L PSL1 X42 line pipe product: (1) Low carbon: Due to high requirements for toughness, weldability and cold formability, its carbon content does not exceed 0.20%. 2) Add manganese-based alloying elements. 3) Adding auxiliary elements such as niobium, titanium or vanadium: a small amount of niobium, titanium or vanadium forms fine carbides or carbonitrides in the steel, which is beneficial to obtain fine ferrite grains and improve the strength and toughness of the steel.

The tempering of API 5L PSL1 X42 line pipe steel plate, the hardened steel will be reheated to a certain temperature, and then a certain method of cooling is called tempering.Its purpose is to eliminate the internal stress caused by quenching, reduce hardness and brittleness, so as to achieve the desired mechanical properties. Tempering is divided into three types: high temperature tempering, medium temperature tempering and low temperature tempering.Tempering and quenching, with the use of normalizing.