4140 Steel Heat Treatment Round Bar / 4140 Heat Treating Steel Round Bar

• Type: Alloy Steel Bar
• Standard: AISI, ASTM, GB, JIS, DIN, BS
• Technique: Q&T (Quenched & Tempered)
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Alloy: Alloy
• Special Use: Mold Steel, Free Cutting Steel, Cold Heading Steel
• Model NO.: 4140 heat treating steel round bar
• Products: Qt Steel Round Bars
• Processing: Quenched and Tempered
• Grade: AISI 4140 Scm440 42CrMo4 En19
• Transport Package: Standard Export Packing
• Specification: M12-M1000
• Trademark: Laiwu Xincheng
• Origin: China
• HS Code: 72283090
• Production Capacity: 3000tons/Month

Product Description

4140 steel heat treatment round bar / 4140 heat treating steel round bar

4140 steel is a king of Chromium-Molybdenum steel material with medium hardenability. It is a general purpose high-tensile steel with medium strength level and good impact properties. As a special steel bar factory, we can produce 4140 steel round bar, 4140 square bar, 4140 flat bar, 4140 hexagonal steel bar. We can also supply different delivery condition of 4140 steel bars such as 4140 hot rolled steel bar, 4140 cold drawn steel bar, 4140 peeled steel bar, 4140 turned steel bar, 4140 centerless ground and polished steel bar as well as 4140 annealed steel bar, 4140 normalized steel bar, 4140 quenched and tempered steel bar, that is to say, 4140 qt steel bar or 4140 q&t steel bar.

4140 Steel reacts well in heat treatment and it is easy to process under heat treatment conditions. This material provides many desirable properties such as good strength and wear resistance, excellent toughness, good ductility and resistance to high-temperature stresses.

 

1. 4140 steel equivalent grade:

Country	USA	German	British	Japan	China	Australia
Standard	ASTM A29	DIN 17200	BS 970	JIS G4105	GB/T 3077	AS 1444
Grades	4140	1.7225/	42CrMo4	SCM440	42CrMo	4140
		42crmo4

2. 4140steel chemical composition:

Standard	Grade	C	Mn	P	S	Si	Ni	Cr	Mo
ASTM A29	4140	0.38-0.43	0.75-1.00	0.035	0.04	0.15-0.35	-	0.8-1.10	0.15-0.25
EN 10250	42CrMo4/	0.38-0.45	0.6-0.9	0.035	0.035	0.4	-	0.9-1.2	0.15-0.30
	1.7225
JIS G4105	SCM440	0.38-0.43	0.60-0.85	0.03	0.03	0.15-0.35	-	0.9-1.2	0.15-0.30

 
3. 4140 steel mechanical properties:
(Different Property canbe catched by adjusting Quenched and Temepering tempreture and time )

Yield Strength (MPa)	Tensile Strength (MPa)	Elongation	Reduction of area	AKV (J)
930 min	1080 min	12% min	45% min	63 min

4. 4140 steel applications:

high strength stud bolt, threaded rods, wind power bolt, prestressed anchor bolts, post stressed anchor bolt, steel tie rod, tie bar, tension rod, tension bar etc. Shaft, axle shaft, crankshaft, shaft for sleeve, linear shaft, pump shaft, rotor shaft, sensor shaft, spline shaft, drive shaft, mandrel shaft, transmission shaft, screw rod etc. CNC machines, precision CNC machines etc. Ejector pins and Ejector rods
 

5.Supply Size range

Delivery condition	Diameter ranges
Hot tolled	M12-M310
Hot rolled+Q&T(Quenched and tempered)	M12-M310.
Cold drawn +Q&T(Quenched and tempered)	M10-M100
Peeled / Peeled+Q&T	M10-M100
Forged/Forged+Heat treatment.	M250-M1000

6.Product Features:

1. High strength and toughness.
2. Great property of quenching and can be deep hardened.
3. Less tempering brittleness tendency.
4. Great machining performance under high temperature and nice appearance after machining.
5. Good performance in weld ability.
6. Excellent performance in impact absorption, such as where the hammer may bounce back and has barely any damage caused upon impact.