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.

 We, Shanghai Unite Steel are committed to integrate engineering steel resources in china and serve the global engineering steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise.

In the aspect of resources and information, we have established cooperative and stronger relationship with nearly hundred enterprises, either state-owned or private owned in china, such as: DAYE Special Steel-a famous steel enterprise with the longest steelmaking history; BAO Steel, and Dongbei Special Steel Group-the biggest special steel manufacturer; TPCO, VALIN-largest seamless steel tube production enterprise; What's more, we have built long, deep and close business relationship with dozens of steel companies, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want!