HQ 705 Prehardened Machinery Steel

High Quality Prehardened Machinery Steel

Characteristics

HQ 705  is Alloyed high quality prehardened machinery steel with good hardenability also in heavier sizes. it combines high strength with best toughness.

Comparison to International Standards: 

AISI/SAE/ASTM : 4337, 4340
Werkstoff : 1.6582
DIN : 34NiCrMo6
BS : 816 M 40, 817 M 40
AFNOR : 35 NCD 6, 34 CrNiMo 8
JIS : SNCM 439
SIS : 2541

Chemical Composition %

C Cr Ni Mo
0.30 – 0.38 1.30 – 1.70 1.30 – 1.70 1.30 – 1.70

Mechanical Properties*

Yield strength, Rp 0.2 min. 700 N/mm2 (70 kg/mm2)
Tensile strength, Rm 900 – 1100 N/mm2 (90 – 110 kg/mm2)
Elongation,A5 min. 12%
Reduction of area, Z min. 55%
Impact strength, KU min. 45 Joules
Hardness 270 – 330 Brinell

* For Ø 100 – Ø 160, properties can be vary according to sizes
All Bars is hardened and tempered to DIN 17200/EN 10083
Applications
Application includes engine mounting, liner, ceramic mould, lever and other machinery parts that requires moderate strength and wear resistance.

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