Quick Details
1: JIS SACM645 steel introduction
SACM645 is nitrided steel, which is a Japanese grade alloy steel and the executive standard is: JIS G4053-2008. SACM645 alloy structural steel has high surface hardness, wear resistance and fatigue strength, good heat resistance and corrosion, and low hardenability.
2: JIS SACM645 steel equivalent
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Country
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China
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Japan
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Germany
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USA
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British
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Standard
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GB/T 3077
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JIS G4105/JIS
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DIN (W-Nr.)
EN 10250
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AISI/ASTM
ASTM A29
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BS 970
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Grade
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38CrMoAl
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SACM645
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41CrAlMo7/34CrAlMo5
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905M39/905M3
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3: JIS SACM645 steel chemical composition
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Grade
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C
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Si
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Mn
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P
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S
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Cr
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Mo
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Ni
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SACM645
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0.35-0.42
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0.20-0.45
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0.30-0.60
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0.035
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0.035
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1.35-1.65
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0.15-0.25
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0.03
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41CrAlMo7/34CrAlMo5
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0.38-0.45
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0.40
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0.40-0.70
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0.025
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0.035
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1.50-1.80
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0.20-0.35
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/
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4: JIS SACM645 steel mechanical properties
The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT. If you want to know the properties, kindly contact the salesman.
5: JIS SACM645 steel overviews
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Size
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Round
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Dia 6-1200mm
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Plate/Flat/Block
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Thickness
6mm-500mm
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Width
20mm-1000mm
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Heat treatment
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Normalized ; Annealed ; Quenched ; Tempered
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Surface condition
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Black; Peeled; Polished; Machined; Grinded; Turned; Milled
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Delivery condition
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Forged; Hot rolled; Cold drawn
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Test
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Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc.
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Payment terms
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T/T;L/C;/Money gram/ Paypal
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Trade terms
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FOB; CIF; C&F; etc..
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Delivery time
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30-45 days
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Application
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SACM645 is used to make nitrided parts with high wear resistance, high fatigue strength and considerable strength and high dimensional accuracy after treatment. Such as imitation die, cylinder liner, gear, high pressure valve, boring rod, worm, grinding machine spindle, etc.
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6. Heat Treatment
Quench 940℃, water cooled, oil cooled
Tempering 640℃, water cooling, oil cooling
7: Delivery condition
For hot forged bar, usually the delivery condition is hot forged, annealed/QT, rough turned/Black surface.
For hot rolled bar, usually the delivery condition is hot rolled, annealed/QT, Black surface.
For hot forged block, usually the delivery condition is hot forged, annealed/QT, milled surface/Black surface
For hot rolled plate, usually the delivery condition is hot rolled, annealed/QT, black surface.
For cold drawn bar, usually the delivery condition is cold drawn, annealed/QT, peeled/black surface
