1.7225/SAE4140 Q+T round bar for mechanical

1.7225/SAE4140 Q+T round bar for mechanical
SAE 4140 alloy steel is chromium, molybdenum, manganese containing low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength.Chemical Composition(%)CSiMnCrMoPSNi0.38~0.450.17~0.370.60~0.900.90~1.200.15-0.25≤0.018≤0.030≤0.012Features
1) Weldability suffers with increasing chromium content;
2) High temperature strength and high pressure hydrogenation properties are promoted by chromium and molybdenum;
3) Molybdenum significantly reduces temper brittleness;
4) Chromium renders steel oil hardenable and increase hardenability;
5) Chromium molybdenum high tensile steel with yield strength of 550N/mm2;Mechanical Properties:
Tensilestrength:σb (MPa):≥1080(110)
Yieldstrength:σs (MPa):≥930(95)
Elongation:δ5 (%):≥12
Sectionshrinkage:ψ(%):≥45
Impactwork:Akv (J):≥63
Impacttoughnessvalue:αkv (J/cm²):≥78(8)Applications
It used for section large forgings, such as locomotive traction gears, with supercharger drive gear, the rear axle, the connecting rod and the spring load greatly clip,oil drill pipe joints and fishing tools,etc.
SpecificationSteelGradeDiameter(mm)Length(mm)Harness(HRC)SCM44016,18,20,23,25,28,30,33,35,38,40,43,45,48,50,55,60,65,70,75,80,85,90,95,100,110,120,130,140, 150,160,170,180,190,200,210,220,230,240,250,260, 270,280,290,300,310,320,330,340,350,360,370,380, 390,400,410,420,430,440,4504000-10000HB160-220Company Profile:
Guangzhou Changfeng Steel Co., Ltd is an export company of Baogang group in south China specialized in exporting special steel, which contains Plastic Mould Steel, Hot Work Mould Steel, Cold Work Mould Steel, Alloy Steel for Mechanical, High Speed Steel, Bearing Steel, Tool Steel, Stainless Steel, Carbon Steel, etc.We also act on behalf of exporting steels of mainly steel factories in China, including Shagang group, Wenfeng group, Xingcheng group, Dongte group, Daye and so on. We are full of ten years export experience to the market all over the word, such as America, Germany, France, Italy, Turkey, Singapore, Thailand, Malaysia, Vietnam, Taiwan, and middle-east.Guangzhou Changfeng Steel Co., Ltd has rich experience and competent elites, which enable us to offer the best service after years of development. Our company equips with large-sized vertical saw machines, horizontal saw machines, milling machines, grinding machines and other advanced equipments to provide customers with cutting and other processing services. We set up strict inspection procedures, including metallographic analysis, hardness test, ultrasonic flaw detection etc., in order to meet the standards of DIN, AISI, JIS and GB to ensure their function and quality.Our company keeps the principle of "sincerely cooperation, endless striving for perfection". We desire to establish the long-term mutual beneficial and win-win relationship with importers all over the word.
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