EN26 826M40 Alloy Steel

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Heat Treatment
Cold Processing
Hot Working

Our supply size :

Diameter : 80 to 600 mm ;

Length : 1000 to 9000 mm ;

Our advantage :

  1. High Quality, Reasonable Price
  2. Over 40 Years Experience
  3. ISO NQA Certificated Factory
  4. Worldwide shipping
  5. Emergency Orders and Fast Delivery



Chemical composition

CSiMnPSCrMoNi 0.25max 0.250.650.550.65



850-1050C. Cool in furnace.


850-880C. Air cool.


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.


820-850C Oil quench.


540-660C hold for 1 hour min. at temperature, air cool.


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.


Typical applications of 826M40 grade steel


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.