Satisfaction Guarantee ASTM 4118 Hot Rolled Structural Tool Steel Round Bar
1: ASTM 4118 introduction
GB 40CR alloy Steel is a high quality Quenched and Tempered Alloy Structural steel, It belong to the high quality low carbon,Low alloy chromium, molybdenum, nickel case hardening steel. Oil Quenched & Tempered Hardness is 28-34 HRc. GB 40CR steel Annealing delivery hardenss less than 250HB.40CR With a lower carbon content range, So GB 40CR alloy steel have good weldability.
2: ASTM 4118 Steel equivalent
| Country | Japan | Germany | Britain | USA | China | Australia |
| Standard | JIS G4105 | DIN EN 10250 | BS970 | ASTM A29 | GB/T 3077 | AS 1444 |
| Grade | SCr440 | 41Cr4(1.7035) | / | 5140 | 40Cr | / |
3: ASTM 4118 steel chemical composition
| Grade | C | Si | Mn | P | S | Cr | Ni | Cu |
| 5140 | 0.38~0.45 | 0.35-0.43 | 0.6~0.9 | 0.025 | 0.025 | 0.9~1.2 | 0.12 | 0.017 |
| SCr440 | 0.38 - 0.43 | 0.15 - 0.35 | 0.6~0.9 | 0.03 | 0.03 | 0.9~1.2 | 0.25 | 0.3 |
| 41Cr4(1.7035) | 0.38 - 0.45 | 0.4 | 0.6 - 0.9 | 0.025 | 0.035 | 0.9 - 1.2 | / | / |
| 40Cr | 0.37~0.44 | 0.17~0.37 | 0.50~0.80 | 0.030 | 0.030 | 0.80~1.10 | / | / |
4:ASTM 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.
5: ASTM 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 | |
| Application | 40Cr alloy steels are used for the fastening piece, machine elements, sleeve gear Extrusion dies and diecasting for alumium, Mandgnesium allay mostly, for copper alloy could use mechaincal press forhing of steel, gears, shafts, spindles, crankshafts, sleeves, pins, connecting rods, screws, nuts, intake valves, etc. | |
6: 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
We are professional manufacturer for many years. we can provide a wide range of steel products.
Usually bundling for large diameter,small diameter bars in bulk or as customer's demand.
The hardness after heat treatment is higher than D2/1.2379/Cr12Mo1V1, and can reach 61-63HRC after high-temperature tempering (525 ± 5 ℃); In terms of strength and wear resistance, it exceeds Cr12Mo1V1, and its toughness is higher than D2/1.2379/Cr12Mo1V1; The manufactured molds rarely have cracks and fissures, greatly improving their service life; The residual stress after wire cutting processing is smaller than that of Cr12Mo1V1; The cutting and grinding performance exceeds Cr12Mo1V1.
Suitable for manufacturing precision punching dies and stamping dies for cold forging, deep drawing, and wire rolling for wire cutting processing.
