17-4Ph Stainless Steel Fasteners
630, A1082, A564, 1.4542, S17400, X5CRNICUNB16-4
17-4 PH Fasteners are martensitic stainless steel fasteners manufactured from alloy containing chromium and nickel with addition of copper to achieve precipitation hardening. Stainless Steel 17-4 PH Fasteners are used in the oil and gas, nuclear and aerospace industries where a combination of high strength, corrosion resistance and a generally low but acceptable degree of toughness is required. TorqBolt is an eminent 17-4 PH fastener supplier in India.
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17-4 PH Fasteners Properties
17-4 Ph Chemical Requirements
| Grades | UNS DesignationB | TypeB | C | Mn | P | S | Si | Cr | Ni | Mo | N | Other Elements |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ASTM A1082/A1082M Precipitation Hardening Grades | S17400 | 630 | 0.07 | 1.00 | 0.040 | 0.030 | 1.00 | 15.0-17.0 | 3.0-5.0 | . . . | . . . | Cu 3.0-5.0, Cb +Ta 0.15-0.45 |
17-4 Ph Mechanical Requirements
| UNS Designation | Type | Solution TreatmentB, C °F [°C] | Mechanical Property Requirements in the Solution Treated Condition | |||||
|---|---|---|---|---|---|---|---|---|
| Tensile Strengthksi [MPa] | Yield Strengthksi [MPa] | Elongation in 2" [50 mm] or 4D, min. % | Reduction of Area, min. % | HardnessD | ||||
| Rockwell,maximum | Brinell, maximum | |||||||
| S17400 | 630 | Cool to below 90 [32] | . . . | . . . | . . . | . . . | 38 HRC | 363 |
17-4 Ph Age Hardening Heat Treatment and Mechanical Property Requirements for PH GradesA
| Type | Condition | Suggested Hardening and/or Aging Temperatures, Time at Temperature, and Quench Media °F [°C]B,C,D,E | Maximum Thickness inch [mm] inclusive | Mechanical Properties | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Tensile Strength ksi [MPA] | Yield Strength ksi [MPA] | Elongation in 2" [50 mm] or 4D % | Reduction of Area, % | HardnessF | Impact Ft-lbf [J] | |||||
| Rockwell, HRC | Brinell | |||||||||
| 630 | H900 | 900 [480], 1 hour | 8 | 190 [1310] | 170 [1170] | 10 | 35 | 40 | 388 | . . . |
| 630 | H925 | 925 [495], 4 hours | 8 | 170 [1170] | 155 [1070] | 10 | 38 | 38 | 375 | 5 [6.8] |
| 630 | h4025 | 1025 [550], 4 hours | 8 | 155 [1070] | 145 [1000] | 12 | 45 | 35 | 331 | 15 [20] |
| 630 | h4075 | 1075 [580], 4 hours | 8 | 145 [1000] | 125 [860] | 13 | 45 | 32 | 311 | 20 [27] |
| 630 | h4100 | 1100 [595], 4 hours | 8 | 140 [965] | 115 [795] | 14 | 45 | 31 | 302 | 25 [34] |
| 630 | h4150 | 1150 [620], 4 hours | 8 | 135 [930] | 105 [725] | 16 | 50 | 28 | 277 | 30 [41] |
| 630 | h4150D | 1150 [620] for 4 hrs., air cool plus 1150 [620] for 4 hrs., air cool | 8 | 125 [860] | 105 [725] | 16 | 50 | 24-33 | 255-311 | 30 [41] |
| 630 | h4150M | 1400 [760] for 2 hrs., air cool plus 1150 [620] for 4 hrs., air cool | 8 | 115 [795] | 75 [520] | 18 | 55 | 24 | 255 | 55 [75] |