DIN 30CrNiMo8 / 1.6580 Alloy Steel

DIN 30CrNiMo8 steel is an alloy steel formulated for primary forming into wrought products.

 

DIN 30CrNiMo8 is a high-strength alloy structural steel known for its excellent yield strength, tensile strength, fatigue strength, as well as sufficient plasticity and toughness. This type of steel is widely used in applications that require high loads and frequent fluctuating pressures, such as the manufacturing of key components such as automobiles, machine tools, chemical containers, and wind turbines.

30CrNiMo8 is usually used in the quenched and tempered state, and its heat treatment process includes:

Quenching heating temperature: 840-860 ℃, cooled with water or oil

Tempering heating temperature: 480-540 ℃, cooled with water or oil to achieve different levels of hardness and strength, such as HRC48-52 to HRC32-36, depending on the tempering temperature.

30CrNiMo8(1.6580) has a wide range of applications, mainly used for:

Modulation parts with high strength, high toughness, and large cross-sectional dimensions, such as forging machine drive shafts and forging machine crankshafts

High pressure chemical vessels with high pressure and frequent fluctuations

Fasteners, pressure pipelines, plastic molds

Main shaft forging of wind turbine generator set

The weldability of 30CrNiMo8 depends on the content of its alloying elements. When the alloy element content is at the lower limit, the weldability is quite good, but when it approaches the upper limit, the weldability is moderate and needs to be preheated to above 175 ℃ before welding.

This steel has good machinability and moderate plasticity during cold deformation.

There is a first type of tempering brittleness in the temperature range of 300-350 ℃ during heat treatment

There is a tendency to form white spots

The international standards corresponding to 30CrNiMo8 include:

DIN EN 10083-3-2006

EN ISO 683-2-2018

EN 10269-2013