AISI 630
AISI 630 (17-4PH) is a hardenable, martensitic stainless steel with high wear resistance, good corrosion resistance, and high yield strength.
By combining excellent mechanical properties and high corrosion resistance, AISI 630 can be used in a marine environment, but it is susceptible to crevice corrosion in standing seawater.
AISI 630 (17-4PH) is manufactured in several strength levels, for example, in solution annealed (AT) and hardened versions (H900, H925, H1025, H1075, H1100, H1150, H1150M).
Phone Number
+86 17335753350
daisy@lorkgroup.com
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Corrosion Resistance
17-4PH Stainless exhibits superior corrosion resistance compared to hardenable 400-Series Stainless chromium grades such as Type 410 Stainless. It is nearly comparable to that of 300-Series Stainless chromium nickel grades, such as Type 304 Stainless. 17-4 corrosion resistance can be affected by surface finish and precipitation hardening heat treatment.
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Fabrication
This grade is readily forged, hot headed, or upset in the range 2050° F and 2200° F, and not below 1850° F. It is usually solution treated after hot work prior to precipitation hardening.
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Machinability
This material machines well in the Solution Treated (Annealed) condition, and about 50% better in Cond H1150.
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Weldability
It is readily weldable by commercial processes without being preheated or post-heated, as usually done for 400-Series Stainless grades.
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Applications
AISI 630 is suitable for a wide variety of applications in the commercial, oil and gas, aerospace, and nuclear industries. It's suitable for intricate parts requiring corrosion resistance and high strength that can be heat-treated and welded with minimal distortion due to its precipitation hardening capabilities.
Chemical Composition
| Element | Min % | Max % |
|---|---|---|
| Carbon | - | 0.07% |
| Manganese | - | 1.00% |
| Silicon | - | 1.00% |
| Phosphorus | - | 0.040% |
| Sulfur | - | 0.030% |
| Chromium | 15.00% | 17.50% |
| Nickel | 3.00% | 5.00% |
| Columbium (Niobium) | 5 times Carbon % | 0.45% |
| Copper | 3.00% | 5.00% |
| Molybdenum | - | 0.50% |
Mechanical Properties
| Condition | Tensile | Yield 0.2% offset | Elongation (%in 2") | Reduction of Area | Brinell Hardness | Rockwell Hardness |
|---|---|---|---|---|---|---|
| H900 | 190 ksi | 170 ksi | 10% | 40% (35% >3") | 388-444 HB | 40-47 HRC |
| H925 | 170 ksi | 155 ksi | 10% | 44% (38% >3") | 375-429 HB | 38-45 HRC |
| H1025 | 155 ksi | 145 ksi | 12% | 45% | 331-401 HB | 34-42 HRC |
| H1075 | 145 ksi | 125 ksi | 13% | 45% | 311-375 HB | 31-38 HRC |
| H1100 | 140 ksi | 115 ksi | 14% | 45% | 302-363 HB | 30-37 HRC |
| H1150 | 135 ksi | 105 ksi | 16% | 50% | 277-352 HB | 28-37 HRC |
| Ann | - | - | - | - | 363 max | 39 HRC Max |
Manufacturing Process
Main Applications
Packaging & Shipping
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