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Assab Steels 709M Machinery Steel
Categories: Metal; Ferrous Metal; Alloy Steel

Material Notes: ASSAB 709M is an alloyed machinery steel with high strength in small and medium sizes. As standard ASSAB 705M is supplied tough hardened requiring no further heat treatment. It can be oil hardened to higher mechanical properties.

Applications: ASSAB 709M is suitable for flame and induction hardening. It can also be nitrided or tuffrided to a surface hardness of 600-650 Vickers.

ASSAB 709M is not suitable for welding but can with certain precautions be repair welded.

Typical applications include shafts and other power transmission components as well as high strength bolts.

AISI /SAE 4140, DIN 42CrMo4, W.nr. 1.7225, BS 708M42, AFNOR 42CD4, JIS SCM4, SS 2244

Vendors:
Available Properties
  • Hardness, Brinell, 700°C tempering temperature. Quenching in oil ø 50. Testpiece hardened by oil quenching from 850°C.
  • Hardness, Brinell, 500°C tempering temperature. Quenching in oil ø 50. Testpiece hardened by oil quenching from 850°C.
  • Hardness, Brinell, un-machined
  • Hardness, Brinell, un-machined
  • Hardness, Rockwell C, tempering temperature 500°C. Hardened by oil quenching.
  • Hardness, Rockwell C, 30 mm from the quenched end.
  • Hardness, Rockwell C, 10 mm from the quenched end.
  • Hardness, Rockwell C, tempering temperature 200°C. Hardened by oil quenching.
  • Tensile Strength at Break, Rm. 700°C tempering temperature. Quenching in oil ø 50. Testpiece hardened by oil quenching from 850°C.
  • Tensile Strength at Break, Rm. 500°C tempering temperature. Quenching in oil ø 50. Testpiece hardened by oil quenching from 850°C.
  • Tensile Strength, Ultimate, Rm., un-machined
  • Tensile Strength, Ultimate, Rm., unmachined
  • Tensile Strength, Yield, Re. 700°C tempering temperature. Quenching in oil ø 50. Testpiece hardened by oil quenching from 850°C.
  • Tensile Strength, Yield, Re. 500°C tempering temperature. Quenching in oil ø 50. Testpiece hardened by oil quenching from 850°C.
  • Tensile Strength, Yield, Re., un-machined
  • Tensile Strength, Yield, Re. , un-machined
  • Elongation at Break, 5XD. 500°C tempering temperature. Quenching in oil ø 120. Testpiece hardened by oil quenching from 850°C.
  • Elongation at Break, 5XD. 700°C tempering temperature. Quenching in oil ø 120. Testpiece hardened by oil quenching from 850°C.
  • Elongation at Break, un-machined
  • Elongation at Break, un-machined
  • Reduction of Area, 500°C tempering temperature. Quenching in oil ø 50. Testpiece hardened by oil quenching from 850°C.
  • Reduction of Area, 700°C tempering temperature. Quenching in oil ø 50. Testpiece hardened by oil quenching from 850°C.
  • Reduction of Area, un-machined
  • Reduction of Area, un-machined
  • Impact Test, un-machined
  • Carbon, C
  • Chromium, Cr
  • Iron, Fe
  • Manganese, Mn
  • Molybdenum, Mo
  • Silicon, Si
  
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