| Property | Value (Metric) | Value (Imperial) | |---------------------------|---------------------------|---------------------------| | Tensile Strength, Ultimate | 1800 – 2000 MPa | 261 – 290 ksi | | Yield Strength (0.2%) | 1650 – 1900 MPa | 239 – 275 ksi | | Elongation in 50mm | 2 – 5% | 2 – 5% | | Hardness (HRC) | 58 – 60 | 58 – 60 | | Modulus of Elasticity | 200 GPa | 29,000 ksi | | Impact Toughness (Charpy V) | 5 – 10 J | 3.7 – 7.4 ft-lbf |
A: Typically 10–15% premium over generic 440C due to additional testing and tighter chemistry. ssis440 2021
Note: The 2021 specification emphasizes across different cross-sections, reducing variability in large-diameter bars. Part 5: Heat Treatment Guidelines for SSIS440 2021 Adhering to the 2021 heat treatment protocols ensures optimal performance: | Property | Value (Metric) | Value (Imperial)
A: Not recommended. Pitting and crevice corrosion will occur. Use super duplex (e.g., 2507) instead. Pitting and crevice corrosion will occur
Introduction In the demanding world of metallurgy and industrial engineering, material selection can mean the difference between decades of reliable service and catastrophic premature failure. Among the pantheon of high-performance alloys, SSIS440 stands out as a specialized grade. However, when we narrow the focus to SSIS440 2021 , we are not merely discussing a metal—we are analyzing a specific revision, specification, and quality control benchmark that defines how this martensitic stainless steel should be produced, tested, and certified in the 2021 industrial landscape.
The adds a caution note: "EDM (electrical discharge machining) of SSIS440 2021 shall be followed by a tempering cycle at 150°C to remove re-cast layer." Part 9: Comparison with Other 2021 Stainless Steel Grades | Grade | Hardness (HRC) | Corrosion Resistance | Wear Resistance | Cost Index | |----------------------|----------------|----------------------|-----------------|------------| | SSIS440 2021 | 58-60 | Medium | Very High | 2.5 | | 316L (2021 spec) | < 95 HRB | High (marine) | Low | 1.0 | | 17-4 PH (H900) | 40-45 | Medium-high | Medium | 2.0 | | 420 (2021 spec) | 50-55 | Low-medium | Medium-high | 1.5 |