SAE 4140 Scm440 En19 42CrMo4 Qt Alloy Steel Round Bars

China SAE 4140 Scm440 En19 42CrMo4 Qt Alloy Steel Round Bars, Find details about China Steel Round Bar, Qt Steel Round Bar from SAE 4140 Scm440 En19 42CrMo4 Qt Alloy Steel Round Bars

Basic Info.

Model NO.

AISI 4140 SCM440 EN19

Condition

Quenched and Tempered

Sizes

M6-M310

Ut Test

Sep 1921 C/C D/D

Grades

AISI 4140 42CrMo4 Scm440 En19

Commodity

Qt Alloy Steel Round Bars

Trademark

Laiwu Xincheng

Transport Package

Standard Export Packing

Specification

M12-M310

Origin

China

HS Code

72283090

Model NO.

AISI 4140 SCM440 EN19

Condition

Quenched and Tempered

Sizes

M6-M310

Ut Test

Sep 1921 C/C D/D

Grades

AISI 4140 42CrMo4 Scm440 En19

Commodity

Qt Alloy Steel Round Bars

Trademark

Laiwu Xincheng

Transport Package

Standard Export Packing

Specification

M12-M310

Origin

China

HS Code

72283090

Product Desciption

SAE 4140 Scm440 En19 42CrMo4 Qt Alloy Steel Round Bars

Quenching and tempering refers to a heat treatment process used to improve the comprehensive mechanical properties of steel materials. That is, after quenching, it is then subjected to high temperature tempering.
The purpose is to make steel parts obtain a good combination of strength and toughness, which has both high strength and excellent toughness, plasticity, and cutting performance.
Some alloy steels or low alloy steels must be quenched and tempered to obtain good comprehensive properties. These steels can also be called quenched and tempered steels.
Ductile iron quenched and tempered can improve both strength and hardness and wear resistance.

AISI 4140 SCM440 EN19 42CrMo4 steel is a Chromium-Molybdenum through-hardening steel of medium hardenability. It is a general purpose high-tensile steel with medium strength level and good impact properties.

1.Sizes we can offer for QT steel round bars

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

2.Equivalent steel 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	0.38-0.45	≤ 0.4	0.6-0.90	≤ 0.025	≤ 0.035	0.9-1.2	0.15-0.30
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.Application of AISI 4140 SCM440 EN19 42CrMo4 Q&T steel bars:
Quenching and tempering is widely used for structural parts that require excellent comprehensive performance, especially working under alternating loads, such as automobile shafts and gears, High strength bolts, aircraft engine turbine shafts, compressor disks, etc.

4.Mechanical properties of AISI 4140 SCM440 EN19 42CrMo4 Q&T steel bars:
(Chinese standard ) We can catch different property as per your requirements

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

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

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
SAE 4140 Scm440 En19 42CrMo4 Qt Alloy Steel Round Bars