42CrMo4 / DIN 1.7225 Forged/Rolled Alloy Steel Round Bars

Product Description

42CrMo4 / 1.7225 Alloy Steel Round Bars

42CrMo4 / DIN 1.7225 alloy steel manufacturers and suppliers, supplied in round rods,square/flat bars,rollers,shafts,blocks and forging pieces.
42CrMo4 steel is a common chromium-molybdenum alloy steel accding to DIN standard,and 1.7225 steel is under W-Nr Germany standard.The carbon content of 42CrMo4 is higher than 25CrMo4 steel. DIN 1.7225 steel is usually used in the manufacture of  forgings which  require higher strength and heat treatment capabilities than 1.7218 steel.At the hardness of HRC18-22,DIN 1.7225 can be easily machined .42CrMo4 alloy steel also has high hardenability and good toughness.

Carbon:0.38/0.45; Silicon:0.40max; Manganese:0.60/0.90;
Chromium:0.90/1.20; Molybdenum:0.15/0.30;

AISI/ASTM: 4140; JIS/KS: SCM440; UNS:G41400

EN 10083 - 3 : 2006 Steels for quenching and tempering. Technical delivery conditions for alloy steels
EN 10132 - 3 : 2000 Cold rolled narrow steel strip for heat treatment. Technical delivery conditions.
EN 10305 - 1 : 2010 Steel tubes for precision applications. Seamless cold drawn tubes
EN 10269 : 1999 Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties
EN 10263 - 4 : 2001 Steel rod, bars and wire for cold heading and cold extrusion.
EN 10250 - 3 : 2000 Open steel die forgings for general engineering purposes.

-DIN 42CrMo4 Alloy Steel as Forged
1)Fuhongsteel manufactures and supplies 42CrMo4 forged steel round bars,square bar,flat bar,shaft,and blocks.
2)DIN 42CrMo4 steel size available:
Round bar
Size: Dia.80-1,000mm
Length: 3,000-10,000mm
Square bar
Size: 150×150-500×500mm
Length: 3,000-8,000mm
(Forged flat bars,Blocks,Shafts and forging pieces can be customized)

-W-Nr 1.7225 Alloy Steel as Rolled
1)Fuhongsteel is a quality steel supplier of  1.7225 rolled steel round bars.
2)W-Nr 1.7225 alloy steel round bar size available:
Size: Dia.10-300mm
Length: 3,000-10,000mm(can be customized)

1)Black surface:-0/+8mm;
2)Machined surface:-0/+3mm;
3)Deviation from straightness:with 360° rotary device 2mm/meter(max);

1)Chemical composition
2)Mechanical properties
3)Non metallic inclusions
4)Grain size:more than 5,preferred to 8;
5)Ultra sonic testing 360° complete round testing: Ultra sonic according to EN 10228-3

42CrMo4 alloy steel is an excellent material for gears, piston pins, crankshafts,and shafts.It is commonly used for locomotive traction with the big gear, supercharger drive gear, rear axle, the load of connecting rod. DIN 1.7225 steel is widely used in a variety of applications in the oil and gas industry. Examples of applications for 42CrMo4 steel also include structural tubing,connection rods, stem assemblies, tool holders,Locomotive traction with the big gear, supercharger drive gear, rear axle, the load of connecting rod and a spring clip. DIN 1.7225 steel can also be used to under 2000m deep well of oil drill pipe joint and the fishing tool and so on.

1)Preheat 42CrMo4 alloy steel uniformly and slowly;
2)Increase the forging temperature up to 1150-1200°C.
3)Always keep the forging temperature above at least 850°C

Hardening&Tempering
1)Heating DIN 1.7225 forged steel slowly to the temperature 840-860°C;
2)DIN 42CrMo4 alloy steel should be quenched in the oil;
3)Heat the steel to the temperature 550-650°C;
4)Soak at this temperature for 2 hours per 25mm of total thickness;
5)42CrMo4 steel can be cooled in the air or furnace;
6)Quenched and tempered and after stress relieved.

After QT,a straightening process is necessary then the products should be tempered and distorsion-poor annealed.

Annealing
1)Heat DIN 42CrMo4 alloy steel slowly and thoroughly to 800-850°C;
2)Cool slowly in the furnace to the temperature around 500°C;
3)Complete annealing the 1.7225 steel in the air.

Normalizing
1)Increase the temperature up to 860-880°C;
2)Cool 1.7225 steel down to room temperature(20°C) in the air.