Quick Details
1: 4135 steel introduction
4135 has high static strength, impact toughness and high fatigue limit, hardenability is higher than 40Cr. High creep strength and rupture strength at high temperature, long term working temperature up to 500℃, medium ductility and poor weldability at cold deformation.
2: 4135 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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35CrMo
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SCM435
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4135
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3: 4135 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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4135
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0.33-0.38
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0.15-0.35
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0.70-0.90
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0.035
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0.04
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0.80-1.10
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0.15-0.25
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0.03
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SCM435
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0.33-0.38
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0.15-0.35
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0.60-0.90
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0.03
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0.03
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0.90-1.20
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0.15-0.30
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0.25
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35CrMo
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0.32-0.40
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0.17-0.37
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0.40-0.70
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0.035
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0.035
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0.80-1.10
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0.15-0.25
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0.30
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4: 4135 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: 4135 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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4135 is used as an important structural member for working under high loads. Such as transmission parts of vehicle and engine, rotor of steam turbine generator, main shaft, heavy load transmission shaft and large-section parts.
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6. Heat Treatment
Annealing : Slowly heated to 850 ℃ and allow enough times, let the steel to be thoroughly heated, Then cool slowly in the furnace to 480 ℃ follow by air cool. The 4135 alloy steel will get MAX 250 HB.
Quenched 850℃, oil cooled.
Tempering 550℃, water cooled, oil cooled.
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
