UNS S46910 Age-Hardening Stainless Steel Bars and Plates
This new martensitic age-hardening stainless steel is specially developed for high-strength applications in extreme environments. After age hardening, it achieves an ultra-high strength of 1930 MPa while maintaining an elongation of 8%. It exhibits unique resistance to hydrogen embrittlement and demonstrates excellent hot-workability.
Applications of UNS S46910
Primarily used in cutting-edge aerospace fields (such as the turbine pump shafts for next-generation rocket engines and load-bearing frames for reusable spacecraft), critical components for deep-sea oil and gas exploration (including 10,000-meter-level explosion-proof valves and high-pressure plunger pumps), and radiation-resistant structural components for fusion devices—representing the most advanced technology currently available in ultra-high-strength stainless steels.
Equivalent Grades and Commonly Used Specifications of UNS S46910
| Steel Grade | Specification | Specification Name |
| 022Cr12Ni9Mo4Cu2AiTi/ S51290 | GB/T 4356 | Stainless Steel Wire Rod |
| GB/T 3280 | Cold Rolled Stainless Steel Plate and Strip | |
| GB/T 4237 | Hot rolled stainless steel plate, sheet and strip | |
| GB/T 4238 | Heat-resisting steel plate, sheet and strip | |
| UNS S46910 | ASTM A564/A564M | Standard Specification for Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes |
| ASTM A693 | Standard Specification for Precipitation-Hardening Stainless and Heat-Resisting Steel Plate, Sheet, and Strip | |
| Produce as other form and size according to technical requirements are available. | ||
Typical Chemical Composition of UNS S46910
|
Elements |
C | Si | Mn | P | S | Ni | Cr | Mo | Cu | Ti | Al |
| Contents% | ≤0.030 | ≤0.70 | ≤1.00 | ≤0.030 | ≤0.015 | 8.00~10.00 | 11.00~13.00 | 3.00~5.00 | 1.50~3.50 | 0.50~1.20 |
0.15~0.50 |
| Produce as other form and size according to technical requirements are available. | |||||||||||
Typical Heat Treatment Condition and Mechanical Properties of UNS S46910
|
Delivery Condition |
Mechanical Properties and Hardness of Heat-Treated Specimens | ||||||
| Rp0.2/(N/mm2) | Rm/(N/mm2) | A/% | Zb/% | Akv2d/J | HBW |
HRC |
|
|
Solution Treated（1000℃-1120℃, cool rapidly） |
≥400 | ≥600 | ≥10 | / | / | ≤315 | ≤33 |
| Precipitation Hardening（CW ½ hard +aging, 475℃, 1h, air） | ≥1500 | ≥1690 | ≥6 | / | / | ≥456 |
≥48 |
|
Precipitation Hardening（CW full hard +aging, 475℃, 1h, air） |
≥2005 | ≥2205 | ≥2 | / | / | ≥561 |
≥55 |
| Produce as other form and size according to technical requirements are available. | |||||||
Product Forms and Size Range of UNS S46910
|
Product forms |
Size range |
|
Bars |
Diameter or side length: 5.0mm~1000mm |
| Flats |
thickness: 4.0mm~1000mm width: 300mm~2200mm |
| Produce as other form and size according to technical requirements are available. | |
