1.6723 / EN39
Qilu
Product Description
BS EN39 835M15 1.6723 Hot Rolled Steel Round Bars
1: BS EN39 Steel Introduction
EN39 (835M15) is a 4.5% nickel, chromium, molybdenum grade, suitable for case hardening to give a case resistant surface with a high core strength up to 1310 N/mm2. This grade is commonly supplied as round bar. EN39A and EN39B are common standards for this grade.
EN39 steel Stock in warehouse
2: EN39 Quality Standard
BS970-3 1991-ENG Specification-for-Wrought-steels-for-mechanical-and-allied-engineering-purposes.pdf
3: BS EN39 Steel Equivalent
| Country | China | Japan | Germany | USA | British |
| Standard | GB GB/T 3077 | JIS JIS G4105/JIS | DIN (W-Nr.) EN 10250 | AISI/ASTM ASTM A29 | BS BS 970 |
| Grade | / | / | 15NiCrMo16-5 / 1.6723 | / | EN39 / 835M15 |
4: BS EN39 Steel Chemical Composition
| Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
| 15NiCrMo16-5 / 1.6723 | 0.12-0.18 | 0.50 | 0.50 | 0.03 | 0.025 | 1.00-1.40 | 0.15-0.45 | 4.00-4.50 |
| EN39 / 835M15 | 0.12-0.18 | 0.15-0.40 | 0.25-0.50 | 0.025 | 0.025 | 1.00-1.40 | 0.15-0.30 | 3.90-4.30 |
5: BS EN39 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 will cause different mechanical properties, such as normalized, tempered, QT. If you want to know the properties, please kindly contact the salesman.
6: BS EN39 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: BS EN39 Steel Application
BS EN39 is used for high duty gears, heavy duty worms, heavy roller bearings, breech mechanisms, small arms components, camshafts, clutch plates, valve rockers.
8: BS EN39 Steel Heat Treatment
Hardening / ℃ : 800 - 820;
Sub-Critically annealed / ℃ : 277;
Normalized and Tempered / ℃ : 269.
9: BS EN39 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: BS EN39 Steel Delivery Condition
For hot forged or hot rolled bar, usually the delivery condition is hot forged, annealed/QT, rough turned/Black surface or 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.
