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

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
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 conditionDiameter ranges
Hot tolledM12-M310
Hot rolled+Q&T(Quenched and tempered)M12-M310.
Cold drawn +Q&T(Quenched and tempered)M10-M100
Peeled / Peeled+Q&TM10-M100
Forged/Forged+Heat treatment.M250-M1000

2.Equivalent steel grade and chemical composition :
StandardGradeCSiMnPSCrMo
ASTM A2941400.38-0.430.15-0.350.75-1.00≤ 0.035≤ 0.040.8-1.10.15-0.25
 42CrMo40.38-0.45≤ 0.40.6-0.90≤ 0.025≤ 0.0350.9-1.20.15-0.30
EN100831.7225
JIS G4105SCM4400.38-0.430.15-0.350.6-0.85≤ 0.035≤ 0.040.9-1.20.15-0.30
GB 307742CrMo0.38-0.450.17-0.370.5-0.80≤ 0.035≤ 0.0350.9-1.20.15-0.25
BS 970EN190.35-0.450.15-0.350.5-0.80≤ 0.035≤ 0.0350.9-1.50.2-0.40

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 StrengthYield Strength                    ElongationReductionImpacting EnergyHBW
Rm,MPaRel,MPaA,% Z,%Aku,J
     After annealing
≥1080≥930≥12≥45≥63217

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
SAE 4140 Scm440 En19 42CrMo4 Qt Alloy Steel Round Bars
SAE 4140 Scm440 En19 42CrMo4 Qt Alloy Steel Round Bars
SAE 4140 Scm440 En19 42CrMo4 Qt Alloy Steel Round Bars