40Cr
Qilu
Product Description
40Cr SCr440 41Cr4(1.7035) 5140 Carbon Steel
1: AISI 40Cr Steel 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.
40Cr steel Stock in warehouse
2: A29 Quality Standard
3: AISI 40Cr 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 | / |
4: AISI 40Cr 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 | / | / |
5: AISI 40Cr 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 40Cr 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 40Cr Steel 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.
8: AISI 40Cr Steel Heat Treatment
Hardening, which takes place in the range 788 °C to 816 °C
Stress Relieving, which takes place in the range 677 °C to 927 °C
9: 40Cr 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.
