SAE 4140 / 42CrMo4 / Scm440 / En19 / A193 B7 Quenched and Tempered Qt Steel Round Bar

• Customization: Available
• Type: Alloy Steel Bar
• Standard: AISI, ASTM, GB, JIS, DIN, BS
• Model NO.: SAE 4140 / 42CrMo4 / SCM440 / EN19 / A193 B7
• Technique: Q&T(Quenched and Tempered)
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Surface Treatment: Balck Oiled
• Alloy: Alloy
• Special Use: Mold Steel, Free Cutting Steel, Cold Heading Steel
• Products: Qt Steel Round Bars
• RW Material: AISI 4140
• Transport Package: Standard Export Packing
• Specification: M12-M310
• Trademark: Laiwu Xincheng
• Origin: China
• HS Code: 72283090
• Production Capacity: 3000tons/Month

Product Description

SAE 4140 / 42CrMo4 / SCM440 / EN19 / A193 B7 Quenched and Tempered QT Steel Round Bar 

1.Delivery condition and size:

Delivery condition	Diameter ranges
Hot rolled	M12-M310
Hot rolled+Q&T(Quenched and tempered)	M12-M310.
Cold drawn +Q&T(Quenched and tempered)	M18-M100
Peeled / Peeled+Q&T	M20-M120
Forged/Forged+Heat treatment.	M200-M1000

 
2.Equivalent grade and 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

3.Typical property of 4140 /42crmo steel 
Also can QT to the properties you need.

Tensile Strength	Yield Strength	Elongation	Reduction	I mpacting Energy	HBW
Rm,MPa	Rel,MPa	A,%	Z,%	Aku,J	≤
					After annealing
≥1080	≥930	≥12	≥45	≥63	217

4.SAE 4140 / 42CrMo4 / SCM440 / EN19 / A193 B7 QT steel applications:
 high tensile shafts, bolts and nuts, gears, pinions and spindles. Locomotive traction with the big gear, supercharger drive gears and so on.

5. Forming
AISI 4140 alloy steel has high ductility. It can be formed using conventional techniques in the annealed condition. It requires more pressure or force for forming because it is tougher than plain carbon steels.

6. Welding
AISI 4140 alloy steel can be welded using all conventional techniques. However, the mechanical properties of this steel will be affected if it is welded in the heat treated condition, and post weld heat treatment should be performed.

7. Forging
AISI 4140 alloy steel is forged at 926 to 1205°C (1700 to 2200°F)

8..Hot Working
AISI 4140 alloy steel can be hot worked at 816 to 1038°C (1500 to 1900°F)

9.Cold Working
AISI 4140 alloy steel can be cold worked using conventional methods in the annealed condition.

10.Delivery time : 7 days for stocks terms, 30 days for new productions.

11.MOQ:2tons

12.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

5.UT Test:SEP 1921-C/c

We company have good QC inspection tear and full set of inspect equipment including: UT test machine, Tensile testing machine, Hardness testing machine, Dimensional measuring instrument, f, spectrometer, Metallographic microscope and so on, so that we can always supply good mateterials for various projects and industries, if you have any need for our producrs, please contact us freely.