EU Din1.8509 Forged Steel Bar Aluminum Alloy Nitriding Steel Grade For Structural Parts

1.8509/41CrAlMo7/905M39 Forged alloy steel rod

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

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

Related specifications:

Germany W.Nr. 1.8509

DIN 41CrAlMo7

Great Britain EN 41B

B.S. 905M39

France AFNOR 40CAD6,12

Italy UNI 41CrAlMo7

Belgium NBN 41CrAlMo7

Sweden SS 2940

Spain UNE 41CrAlMo7

Chemical Composition(%):

Carbon 0.38-0.45
Silicon 0.40 max
Manganese 0.40-0.70
Chromium 1.50-1.80
Phosphorous 0.025 max
Sulphur 0.035 max

Molybdenum 0.20-0.35
Aluminum 0.80-1.20

Process: EAF/LD+LF+VOD+ hot Forged/hot rolled+Heat Treatment(optional)

SIZE RANGE:

Round: Dia 10mm - 1200mm

SURFACE FINISHES:
Black, grinded, turned

Ultrasonic test: According to SEP 1921-84

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.

Forging
Hot forming temperature: 1050-850oC.

Certificate of Quality: issued in English, in addition the normal terms, production process, the mechanical property (yield strength, tensile strength, elongation and hardness), forged ratio, UT test result, Grain size, heat treatment methods and the sample of is shown on the Certificate of Quality.

Marking: Heat No. will be cold stamped and Steel grade, diameter (mm), length (mm), and the manufacturer LOGO and weight (kg) is painted.