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.
4118 steel Stock in warehouse
2: A29 Quality Standard
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.
