Premium 4140 Forged Steel Square Block for Industrial Use

Product Description

Name: Hot forging 4140 42crmo4 steel square block /forged steel flat bar
Products reference:

Material	42crmo4 ,25Cr2Ni4MoV,34CrNi3Mo,30Cr2Ni2Mo
Application	Rotaiton parts of steam turbine consist of electric rotor winding,magnetic conductive core iron and rotor shaft extension,retaining ring, central ring and fan.
Melting process	EF+LF+VD
Production process	Forging+heat treatment+rough machining+finish machining
Forging ratio	≥3.5
Applicable standard	ASTM,ASME,DIN,JIS,ISO,BS,API,EN
Executive standard	JB/GB/EN/DIN/JIS/ASME/ASTM/ISO
Certification authority	ISO,BV,SGS,IST,UL.CTI
Delivery terms	Rough machining(N+T);finish machining(Q+T)
Test machine	Spectrograph,UT device,tensile and compact test machine,metalloscope,outside micrometer,bore dial indicator,hardness test machine
Service	Our service included the forging, process, heat treatment, finish machining, package, local logistics, customers clearance and maritime transport. We took the customer's requirements as the principal thing, and pay attention on the products quality.

3, Custom properties

Material elements	C	Si	Mn	P	S	Cr	Ni	Mo	V
25Cr2Ni4MoV	≤0.25	≤0.23	≤0.53	≤0.006	≤0.004	≥1.62	≥3.75	≥0.33	≥0.09
30Cr2Ni2Mo	0.26-0.34	0.17-0.37	0.30-0.60	≤0.006	≤0.0005	1.80-2.20	1.80-2.20	0.30-0.35	-

Mechanical property	Dia.(mm)	TS/Rm(Mpa)	YS/Rp0.2(Mpa)	EL/A5(%)	RA/Z(%)	Type Of notch	Impact energy	HBW
30Cr2Ni2Mo	Ø10	≥980	≥835	≥12	≥55	V	≥78	≤269HBS

 
4, Process procedure:
Forging process flow quality control: Raw material steel ingot into warehouse(test the chemical content) → Cutting→ Heating(Furnace temperture test) → Heat treatment after forging(Furnace temperture test) Discharge the furnace(blank inspection)→ Machining→ Inspection(UT,MT,Visal diamention, hardness)→ QT→ Inspection(UT, mechanical properties, hardness, grain size)→ Finish machining→ Inspection (dimension)→ Packing and Marking (steel stamp, mark)→ Storage Shipment.

Finished product