Mat.No. 1.8509, DIN 41CrAlNi7

Mat.No. 1.8509, DIN 41CrAlNi7

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Designation by Standards Brand Name Ravne No. Mat. No. DIN EN AISI PO733 733 1.8509 41CrAlNi7 - - Chemical Composition (in weight %) C Si Mn Cr Mo Ni V W Others 0.41 max. 0.40 0.65 1.65 0.33 - - - Al=1.00 DescriptionAl-alloyed nitriding steel grade for large-sections. ApplicationsStructural parts with high surface hardness – piston rods, extruders, cylinders, shafts, straightening tools, measuring tools, etc.  Physical properties (avarage values) at ambient temperat...


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Designation by Standards

Brand Name Ravne No. Mat. No. DIN EN AISI
PO733 733 1.8509 41CrAlNi7 - -

Chemical Composition (in weight %)

C Si Mn Cr Mo Ni V W Others
0.41 max. 0.40 0.65 1.65 0.33 - - - Al=1.00

Description
Al-alloyed nitriding steel grade for large-sections.

Applications
Structural parts with high surface hardness – piston rods, extruders, cylinders, shafts, straightening tools, measuring tools, etc. 

Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 210 
Density [g/cm3]: 7.73

Coefficient of Linear Thermal Expansion 10-6 oC-1

-191 to +16oC 20-100oC 20-200oC 20-300oC 20-400oC 20-500oC
9.1 11.1 12.1 12.9 13.5 13.9

Continuous Cooling Transformation (CCT) Diagram


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Time-Temperature Transformation (TTT) Diagram


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Soft Annealing
Heat to 650-700oC, cool slowly. This will produce a maximum Brinell hardness of 248.

Hardening
Harden from a temperature of 870-930oC followed by oil/polymer or water quenching.

Tempering
Tempering temperature: 580-700oC.

Nitriding
Temperature: 480-570oC.
Surface hardness after nitriding: 950 HV

Mechanical Properties in Quenched and Tempered Condition

Diameter (mm) 0.2 proof stress (N/mm2) Tensile stregth (N/mm2) Elongation (%) Reduction (%) Notch impact energy (ISO-V) (J)
16-40 750 950-1150 11 - 25
41-100 720 900-1100 13 - 25
101-160 670 850-1050 14 - 30
161-250 625 800-1000 15 - 30

Diagram Tempering Temperature – Mechanical Properties


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Forging
Hot forming temperature: 1050-850oC. 

Machinability
No data.

Forms manufactured: Please see the Dimensional Sales Program. 

Disclaimer
The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as the become available.

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