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20CrMo SCM420 18CrMo4/1.7243 4118 Forged Steel

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  • 4118

  • Qilu

Product Description

20CrMo SCM420 18CrMo4/1.7243 4118 Forged Steel


1: AISI 4118 Steel Introduction

  Steel 4118 Round Bar is one of popular alloy steel used for engineering purpose, like fasteners, high pressure pipe and more advanced carburized parts, such as gear, shaft, etc. which work in the noncorrosive medium and temperature below 250 oC, working with nitrogen hydrogen mixture in the medium.

                        1045 C45(7)

4118 steel Stock in warehouse


2: A29 Quality Standard

ASTM-A29-05 ENG Standard-Specification-Steel-Bars-Carbon-and-Alloy-Hot-Wrought-General-Requirements.pdf


3: AISI 4118 Steel Equivalent

Country British USA Japan
Standard DIN/EN10084 ASTM A29 JIS G4105
Grade 18CrMo4/1.7243 4118 SCM420


4: AISI 4118 Steel Chemical Composition

Grade C Si Mn P S Cr Mo Ni
4118 0.18-0.23 0.15-0.35 0.7-0.9 0.035 0.035 0.4-0.6 0.08-0.15 /
18CrMo4 0.15-0.21 0.4 0.6-0.9 0.025 0.035 0.9-1.2 0.15-0.25 /
SCM420 0.18-0.23 0.15-0.35 0.6-0.85 0.03 0.03 0.9-1.2 0.15-0.30 /


5: AISI 4118 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.


6: AISI 4118 Steel Overviews

Size Round Dia 6-1200mm
Plate/Flat/Block Thickness
6mm-500mm
Width
20mm-1000mm
Heat treatment Normalized ; Annealed ; Quenched ; Tempered
Surface condition Black; Peeled; Polished; Machined; Grinded; Turned; Milled
Delivery condition Forged; Hot rolled; Cold drawn
Test Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc.
Payment terms T/T;L/C;/Money gram/ Paypal
Trade terms FOB; CIF; C&F; etc..
Delivery time 30-45 days


7: AISI 4118 Steel Application

   4118 are used for gear components of all kind and cog wheels. Open die steel forgings for general engineering purposes.


8: AISI 4118 Steel Heat Treatment

   Normalizing
   Normalizing temperature: 860-900oC.
   Hardening
   Harden AISI 4118 steel from a temperature of 850-880oC followed by oil or water quenching. Hardness after      quenching is 39-47 HRC.
   Tempering

Tempering temperature: 595-700oC.


9: 4118 Steel Tolerance


Diameter(mm)

Tolerance

Forged Steel Round Bar

80-600

Black Surface:0~+5

Rough Machined or Turned:0~+3

650-1200

Black Surface:0~+15

Rough Machined or Turned:0~+3

Hot Rolled Steel Round Bar

16-310

Black Surface:0~+1

Peeled:H11

Cold Drawn Steel Round Bar

6-100

Black Surface:H11

Peeled:H11


10: Delivery Condition
For hot forged bar, usually the delivery condition is hot forged, annealed rough turned/Black surface.
For hot rolled bar, usually the delivery condition is hot rolled, annealed, Black surface.
For hot forged plate, usually the delivery condition is hot forged, annealed, milled surface
For hot rolled plate, usually the delivery condition is hot rolled, annealed, black surface.


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