Description
EN39B Round Bars / 835M15 Steel Case Hardening
EN39B Round Bars is a 3.90 to 4.30% Nickel Chromium Molybdenum carburising steel, generally supplied annealed to HB 277 max. Carburised and heat treated it develops a hard wear resistant case of about Rc 6-63 and a tough strong core with a typical tensile strength range 1000-1400 MPa, in small to quite large sections.
EN39B is a case hardening steel which may be carburised and hardened in large sections to produce a hard wear resistance case, and developing a core strength of the order of 1310N/mm ² with good resistance to shock.
We Textron Steel and Alloys Hold stock of EN39B Case Hardening Round Bars and can also arrange bulk qty of make to order basis.
EN39B Chemical Composition / Chemical Composition of EN39B :
| Elements | Min.% | Max.% |
| C | 0.12 | 0.18 |
| Si | 0.10 | 0.35 |
| Mn | 0.25 | 0.50 |
| S | – | 0.040 |
| P | – | 0.035 |
| Cr | 1.00 | 1.40 |
| Ni | 3.90 | 4.30 |
| Mo | 0.15 | 0.30 |
Related Specifications :
- • Australia AS X9315 / EN39B
• Germany DIN: 15NiCrMo16-5
• Great Britain 835M15 or 835H15
• Japan SNCM 815, JIS G 4103
• USA EN39B
Applications of EN39B Round Bars :
Components with large cross sections requiring very high toughness and core strength (1300 MPa) such as gears, gear shafts and heavy duty gear shafts in aircraft, truck construction and mechanical engineering.
Widley used in the automotive and Armaments Industries 835M15 is used in Heavy Duty Gears, Clutch plates, Fly Wheels, Cam Shafts & Rocker Valves, Heavy Roller Bearings, Breach Mechanisms and Small Arms components.
- • High Duty Gears
- • Heavy Duty Worms
- • Heavy Roller Bearings
- • Breech Mechanisms
- • Valve Rockers
- • Small Arms Components
- • Camshafts
- • Clutch Plates
Machining of EN39B :
EN39B is readily machinable allowing processes such as Sawing, Turning, Drilling, Boring and Milling to be relatively easily achieved.
Form of supply in EN39B:
Material can be supplied in Black Annealed – Rolled/Forged Bar, Proof Machined, Bright Turned or Ground Bar, Cut Pieces or Machined to customer specification.
