BS Standard 90mm~800mm 709M40 Forged steel shafts round bar

Forged steel round bar

General:A Chromium Molybdenum High Tensile Through Hardening Steel

Capable of Surface Hardening by Niriding

Uses:Suitable for Gears,Axles,Shafts ETC.

Grade:709M40

Related specifications:1.7225,42CrMo4

Chemical Analysis:

C:0.36/0.44; Si:0.20-0.40; Mn:0.80/1.10;P:Max 0.025;S:Max 0.025,

Cr:0.90-1.20,Mo:0.25-0.35;Ni:Max 0.30,[H]:Max 2ppm

Standard: BS

Grain Size:6-8

Delivery condition: Hot forged +Normalized+Rough Turned+Q/T

Or Only forged of black surface bars.

As forged condition straightness: Max 4mm/m,  RT bar straightness: Max 2mm/m

As forged diameter tolerance: -0/+8mm; RT diameter tolerance:-0/+3 mm

Non-metal inclusion: as per ASTM E45 A/B/C/D heavy  Max 1.5, thin  Max 1.5

Size: 90mm~800mm
Length: 4.0m and up(Or fix length according the customer requirement).
Inspecting: UTS according to SEP 1921 C/c,D/d,E/e,A388 or GB/T 6402

Mechanical Properties(Example Only and Example is for “T” condition)

Ten.Strenth:Min.870 N/MM2  

Yield Stress:Min.740 N/MM2

Elong:Min 18%

BHN:280-320

Cut both ends

Min. qty.: 15MT per size.
Delivery: By both negotiation.(By bulk shippment or By Container)