AISI 4140 Hot Rolled and Forged Round Bar Alloy

• Customization: Available
• After-sales Service: Change/Return If Quality Defect
• Warranty: 10 Year
• Type: Alloy Steel Bar
• Standard: AISI, ASTM, GB, JIS, DIN
• Technique: Hot Rolled
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Alloy: Alloy
• Special Use: Mold Steel
• Lead Time: 7days for Stock
• Quality Control: PMI Test, Dimension and Visual Inspection
• Mtc: En10204 3.1
• Transport Package: in Bundles with Metal Strip
• Specification: 16-450mm on stock
• Trademark: Xiang Steel, Daye
• Origin: China
• HS Code: 7225409900
• Production Capacity: 1000tons/Year

Product Description

AISI 4140 Hot Rolled and Forged Round Bar Alloy

Product Introduction
1.7225 classify in the group of low alloy which provide high strength through combination of Chromium and Molybdinum. This result in impact resistance at low temperature.Selling condition is quenched and tempered. Its convenience for further surface hardening in order to enhance surface hardness. Caution is it is not suitable to use at temperature higher than 480c since hardness will sharply fall. Besides, usage or tempering at level 230-270c might cause condition of blue brittleness which will decrease its strength.

42CrMo steel is an ultra-high strength steel with high strength and toughness, good hardenability, no obvious temper
brittleness, high fatigue limit and multiple impact resistance after quenching and tempering, and good low temperature impact toughness.


Features
   High Strength
•   Resistance to fatigue
•   Wear resistance
•   Forgeability
•   High toughness
•   Moderate in machinability
•   Not good for welding
•   Moderate in control carbon loss at surface.
•   Easy to quench, return hardness is 55-60HRC.
•   Good for induction
•   Can do nitriding , surface hardness is 650 HV
•   Easy to do surface hardening such as induction or nitriding
•   Can be applied to mold in some case.
Equal Standards

Chinese	American	German	Japanese	British
GB	AISI	DIN	JIS	BS
42CrMo	SAE4140	1.7225	SCM440	EN19

Chemical Composition

Grades	C	Si	Mn	P	S	Cr	Mo	Cu	Ni
4140	0.38-0.45	0.17-0.37	0.5-0.8	≤0.035	≤0.035	0.9-1.2	0.15-0.25	≤0.3	≤0.035
42CrMo	0.38-0.45	0.17-0.35	0.5-0.8	≤0.035	≤0.035	0.9-1.2	0.15-0.25	≤0.03	≤0.03
440	0.38-0.43	0.15-0.35	0.6-0.85	≤0.03	≤0.03	0.9-1.2	0.15-0.3	≤0.3	≤0.25

Heat Treatment

Quenching			Tempering
Heating Temperature/ºC	Cooling	Hardness/HRC	Heating Temperature/ºC	Cooling	Hardness/HRC
820-840	Oil	≥53	450-650	Air	25-40

Applications
1.7225 can be applied to machinery parts which require high strength such as powertrain, joint steering wheel, wheel shaft, piston rod boring bit for oil and gas drilling, water pump parts, high pressure pipe , big size gear, flange and locking tool.
Suitable for manufacturing requirment a certain strength and toughness of large and medium-sized plastic mold, such as locomotive traction with the big gear, the supercharger drive gear, pressure vessle, rear axle, gear load connecting rod and a spring clip
Used to under 2000m deep well of oil drill pipe joint and the fishing tool
Used for bending machine mould  
Stock Size

Plate	Thickness	20-120mm
	Width	2200mm
	Length	4000-10000mm
round bar	Diameter	16-450mm
	Length	4000-10000mm

Packing
Antirust oil, Pearl Film, Spacer, Kraft Paper, Wooden Case, Wooden Frame, Ect.
Accept Customized Packing.
Services
Sawing-to-size- Flate/ Round (Vertical Cutting/ Horizontal Cutting machine)
Machine and milling -Plate / Round (Plane washing/ Peeling Machine)
Block Cutting(Customized Size)
Machine Grinding (Grinding Machine/ / Cold Draw Machine)
Side Milling / Round Milling(Plate: 2 / 4 / 6 side milling) / (Round:Cold draw/ Grinding/ Turned, Etc.)
A. Steel plates: Cutting by bandsaw machine, milling, heat treatment, etc
B. Round bars: Cutting by bandsaw machine, peeling, grinding and turned, heat treatment, etc
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