BioDur® 734 Stainless

BioDur® 734 stainless is a nitrogen-strengthened, austenitic stainless steel. The alloy exhibits improved tensile strength, impact strength, fatigue strength, and crevice and pitting corrosion resistance over standard BioDur® 316LS. The microstructural integrity and cleanness of this alloy is insured through electro-slag remelting (ESR). The alloy is non-magnetic and is essentially free of ferrite. For a nickel-free alternative, BioDur 108 offers higher strength and corrosion resistance compared to both BioDur® 316LS and BioDur® 734.

Applications include implantable orthopedic parts such as bone plates, bone screws, and hip and knee components. These components are typically fabricated by forging and machining. The chemistry of BioDur® 734 meets the recently implemented EU MDR regulatory labeling threshold of less than 0.10% cobalt by weight. Devices made from this alloy should not need to be labeled as containing a potential CMR (carcinogenic, mutagenic and reprotoxin) element.

Type Analysis
  • Carbon (Maximum) 0.080%
  • Phosphorus (Maximum) 0.025%
  • Silicon (Maximum) 0.75%
  • Nickel (Nominal) 9.00-11.00%
  • Manganese (Nominal) 2.00-4.25%
  • Sulfur (Maximum) 0.010%
  • Sulfur (Nominal) null %
  • Chromium (Maximum) null %
  • Chromium (Nominal) 19.50-22.00%
  • Cobalt (Nominal) < 0.10%
  • Molybdenum (Maximum) null %
  • Molybdenum (Nominal) 2.00-3.00%
  • Iron (Maximum) null %
  • Iron (Nominal) Balance%
  • Copper (Maximum) 0.25%
  • Copper (Nominal) null %
  • Columbium+Tantalum null %
  • Columbium/Niobium (Nominal)0.25-0.80%
  • Tantalum null %
  • Nitrogen (Maximum) null %
  • Nitrogen (Nominal) 0.25-0.50%
  • Boron (Maximum) null %
  • Boron (Nominal) null %
  • Gadolinium (Maximum) null %
  • Hydrogen (Maximum) null %
  • Hydrogen (Nominal) null %
  • Oxygen (Maximum) null %
  • Nickel/Cobalt (Nominal) null %
  • Yttrium (Nominal) null %
  • Zirconium (Nominal) null %
  • Vanadium (Nominal) null %
  • Selenium (Nominal) null %
  • Niobium (Nominal) null %
  • Magnesium (Nominal) null %
  • Tin (Nominal) null %
  • Tin (Maximum)null %
  • Zinc (Maximum) null %
  • Lead (Maximum) null %
  • Scandium (Nominal) null %

Applications

Applicable Specifications

Bar

Rounds

Billet

Strip

Wire

Rod

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