Our supply size :
Diameter : 80 to 600 mm ;
Length : 1000 to 9000 mm ;
Our advantage :
- High Quality, Reasonable Price
- Over 40 Years Experience
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- Worldwide shipping
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Equivalent
| AS | DIN | BS 970 |
| X9940 | 1.6745 | EN26 |
Chemical composition
| C | Si | Mn | P | S | Cr | Mo | Ni |
| 0.4 | 0.25 | 0.6 | max 0.25 | max 0.25 | 0.65 | 0.55 | 0.65 |
HEAT TREATMENT
Forge
850-1050C. Cool in furnace.
Normalize
850-880C. Air cool.
Anneal
650-700C. Cool slowly in controlled furnace.
Stress relieve
In the quenched and tempered condition, about 30-50C below
the tempering temperature. Air cool.
In the annealed condition, 600-650C. Air cool.
Harden
820-850C Oil quench.
Temper
540-660C hold for 1 hour min. at temperature, air cool.
Description
826M40 steel is still often referred to as EN26 steel – its equivalent grade under the previous BS 970: 1955 standard.
826M40 grade steel is a 2.5% nickel-chromium-molybdenum through hardening steel which has a high hardenability.
It may be treated in relatively large section sizes to produce tensile strengths ranging from 850 to over 1550 N/mm² combined with good ductility and resistance to stock.
Due to its high molybdenum content, the steel may normally be tempered in the range 300-550C without serious loss of impact values.
Good mechanical properties at low temperature can also be obtained.
Applications
Typical applications of 826M40 grade steel
Undercarriages
Aero-engine and airframe parts
Heavy duty gears
Pinion connecting rods
Crank and differential shafts and other transmission parts
High strength bolts and studs
Electrical motor shafts
Turbine discs
Gas bottles
Mandrel bars for tube manufacture
Ordnance parts
Smelting Option
1 EAF: Electric Arc Furnace
2 EAF+LF+VD: Refined-smelting and vacuum degassing
3 EAF+ESR: Electro Slag Remelting
4 EAF+PESR: protective atmosphere Electro Slag Remelting
5 VIM+PESR: Vacuum induction melting
Forming Option
1 Hot rolling process
2 Hot Forging: Electro-hydraulic; High-speed-hydraulic; Oil-hydraulic; Precision-forging
Heat-treatment Option
1 +A: Annealed (full/soft/spheroidizing)
2 +N: Normalized
3 +NT: Normalized and tempered
4 +QT: Quenched and tempered (water/oil)
Surface Option
1 Black Surface
2 Grounded: Bright but rough ; Not precision
3 Machining for plate: Bright and precision; Little turning scar
4 Peeled/Turned: Bright and precision; Little turning scar
5 Polished: Very Bright and precision size; Not turning scar
Other Services
1 Cutting: Small pieces
2 CNC Machine: Produce as your drawing
3 Package: Bare/Nylon/Canvas/Wooden
4 Payment:T/T, L/C, O/A(request credit)
5 Transport:FOB/CFR/CIF/DDU/DDP (train/ship/Air)
Mill test certificate
EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.
