ASTM F1586 specifies high-nitrogen chromium-manganese austenitic stainless steel (1.4472) produced by Pressurized Electro-Slag Remelting (PESR) for surgical implants. This alloy offers high toughness, excellent pitting resistance, near-zero delta-ferrite, and outstanding fatigue resistance, making it ideal for bone surgery, internal fixation devices, and endoprostheses .
1. Product Specifications & Physical DataAvailable Forms: Precision ground round bar (3.0-30.0mm), flat bar . Specifications: ASTM F1586, ISO 5832-9, UNS S31675, EN 1.4472 .
| Chemical Composition (Weight %) | Value |
|---|
| Chromium (Cr) | 20.5 - 23.5 | | Nickel (Ni) | 9.0 - 11.0 | | Manganese (Mn) | 2.0 - 4.0 | | Molybdenum (Mo) | 2.0 - 3.0 | | Nitrogen (N) | 0.35 - 0.50 | | Carbon (C) | 0.08 max. |
| Physical Properties | Value |
|---|
| Density | 7.9 g/cm³ | | Modulus of Elasticity | 190-200 GPa | | Magnetic Permeability | < 1.01 |
| Mechanical Properties | Annealed | Cold-Worked |
|---|
| Tensile Strength (min.) | 620 MPa | 860-1200 MPa | | Yield Strength (min.) | 310 MPa | 620-1000 MPa | | Elongation (min.) | 35% | 10-20% |
2. Operating Conditions & Selection CriteriaBiocompatibility: ASTM F1586 / ISO 5832-9 approved for surgical implants Pitting Resistance: PRE ≥ 35 due to high Cr, Mo, and N content Delta-Ferrite: Near-zero (< 0.5%) ensures stable austenitic structure Nitrogen Strengthening: 0.35-0.50% N provides high strength without compromising ductility Fatigue Resistance: Excellent for load-bearing orthopedic implants Inclusion Cleanliness: PESR melting enables mirror polishing
3. Fabrication & Material ComparisonAnnealing: 1050-1080°C, water quench Hot Forging: 1000-1150°C Hardening: Cold working only Polishability: Excellent for mirror and electropolishing
| Comparison | 1.4472 | 316LVM | Ti-6Al-4V |
|---|
| Tensile Strength | 620 MPa | 490 MPa | 860 MPa | | PRE | ≥ 35 | ~25 | — | | Delta-Ferrite | Near-zero | Low | — | | Primary Use | Bone surgery, fixation | General implants | Orthopedic implants |
4. ApplicationsBone plates, screws, spinal rods, fixation devices Endoprostheses (hip stems, knee components) Micro-mechanical implants requiring high consistency Orthopedic trauma and fracture repair hardware
Contact ZYTC Alloy for certified ASTM F1586 1.4472 precision ground bar (3-30mm diameter) with EN 10204 3.1/3.2 certificates and full traceability. Available in annealed, medium-hard, and hard conditions. Email: daisy@zytcsteel.com WhatsApp/WeChat: +86 17335753350 |
