AISI 4140 En19 42CrMo4 Hardening and Tempering Qt Alloy Steel Round Bar

• Type: Alloy Steel Bar
• Standard: AISI, ASTM, GB, JIS, DIN, BS
• Technique: Quenched and Tempered
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Alloy: Alloy
• Special Use: Mold Steel
• Model NO.: AISI 4140 EN19 42crmo4
• Steel Grade: Scm440 42CrMo4 AISI SAE ASTM 4140
• Delievery Condition: Qt Alloy Steel Round Bars
• Commodition: 4140 Quenched & Tempered
• Condition: AISI/SAE 4140+Qt
• Techniques: Quenched and Tempered
• Diameter: 12mm to 1000mm
• Transport Package: Standard Export Packing
• Specification: Diameter 12mm to 1000mm
• Origin: China
• HS Code: 72283090
• Production Capacity: 3000tons/Month

Product Description

AISI 4140 EN19 42crmo4 hardening and tempering qt alloy steel round bar 
AISI 4140 QT steel round bar , SCM440 EN19 Quenched and tempered steel round bars. 

1.Applications of Heat-Treatable Steel AISI/SAE 4140+QT 
The i Machine construction, machine parts, axes, knuckles, connecting rods, crankshafts, gear shafts, pinions, gears, bandages, base plates, assembling parts, and so on.

2.Sizes range of 4140 QT steel bars we can supply :

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

3.4140 Steel Equivalent

Standard	AISI / SAE 4140
UNS	-
WERKSTOFF NR.	41CrMo4, 42CrMo4, 42CrMoS4, 43CrMo4
BS 970	708M40, 708A42, 709M40, En19, En19C
UNI	41CrMo4, 38CrMo4 (KB), G40 CrMo4, 42CrMo4
JIS	SCM 440, SCM 440H, SNB 7, SCM 4M, SCM 4
EN name	42CrMo4
EN #	1.7223, 1.7225, 1.7227, 1.3563

4. 4140 steel chemical composition

Standard	Grade	C	Si	Mn	P	S	Cr	Mo
ASTM A29	4140	0.38-0.43	0.15-0.35	0.75-1.00	≤ 0.035	≤ 0.04	0.8-1.1	0.15-0.25
	42CrMo4	0.38-0.45	≤ 0.4	0.6-0.90	≤ 0.025	≤ 0.035	0.9-1.2	0.15-0.30
EN10083	1.7225
JIS G4105	SCM440	0.38-0.43	0.15-0.35	0.6-0.85	≤ 0.035	≤ 0.04	0.9-1.2	0.15-0.30
GB 3077	42CrMo	0.38-0.45	0.17-0.37	0.5-0.80	≤ 0.035	≤ 0.035	0.9-1.2	0.15-0.25
BS 970	EN19	0.35-0.45	0.15-0.35	0.5-0.80	≤ 0.035	≤ 0.035	0.9-1.5	0.2-0.40

5.Quality control
1.Processing Line:
Iron - hot metal pretreatment - Converter - Refining --VD / RH- - Continuous Casting - Hot Rolling (KOCKS) - heat --UT Check - Processing and Distribution Center
Electric Furnace - Refining --VD / RH- - Continuous Casting - Hot Rolling (KOCKS) - heat --UT Check - Processing and Distribution Center
2.Gas content level:O2 - <20 ppm H2 - <2 ppm N2- <100 ppm
3.Grain Sizes:5-8
4. non-metallic inclusions contorlling level

	A	B	C	D
	MAX	MAX	MAX	MAX
Thin	2	2	2	2
Thick	1	1	1	1

6.Delivery time of steel bar:
7-10days of stock,30 days after order confirmed for new produced .
7.Payment term:TT or LC
8.Free sample:Yes
9.steel bar Inspection: Spectral Tested, Microstructure Tested,Hardness Test,Macrostructure Test,UT test and so on. 
10.Mark: Heat Number,Weight,Sizes,Grade,etc