JIS Scm440 Quenched and Tempered Steel Round Bars

• 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.: JIS SCM440
• 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

JIS SCM440 Quenched and Tempered Steel Round bars
 

SCM440 Steel Bar is medium carbon chromium molybdenum alloy steel, which is an alloy steel containing chromium and molybdenum. It has the advantages of stable composition, low harmful elements, high steel purity, small decarburization layer and few surface defects. It is easy to be spheroidized and has low cold cracking rate.

SCM440 Steel Bar has good machinability. Operations such as turning, hobbing, drilling, sawing, broaching, tapping and milling can be easily performed using the recommendations provided by the machine's manufacturer for ideal tool type-feeds and speeds.

SCM440 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. SCM440 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. SCM440 steel 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. SCM440 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. SCM440 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.