Chemical composition
Nominal: mid-range where both limits are given, the cap where only a maximum is, balance takes the remainder. Exact specified ranges below.
| Element | Name | Content % | |
|---|---|---|---|
| Main elements5 elements | |||
| Fe | Iron | Bal. | |
| Cr | Chromium | 14 – 15.5% | |
| Ni | Nickel | 3.5 – 5.5% | |
| Cu | Copper | 2.5 – 4.5% | |
| Nb | Niobium | 0.15 – 0.45% | |
| Element | Name | Content % | |
|---|---|---|---|
| Minor & residual5 elements | |||
| C | Carbon | ≤ 0.07% | |
| Mn | Manganese | ≤ 1% | |
| Si | Silicon | ≤ 1% | |
| P | Phosphorus | ≤ 0.04% | |
| S | Sulphur | ≤ 0.03% | |
Mechanical minima by form
Guaranteed values differ by form, size and delivery condition; quotations confirm the specification, form, size and condition.
| Form | Condition | Rm MPa | Rp0.2 MPa | A ≥ % | Other requirements and notes |
|---|---|---|---|---|---|
| Bar and forgings | |||||
| Bar and shapes (≤300 mm) | Aged at H900: 480 °C for 1 h, air cooled, longitudinal | ≥ 1310 (190 ksi) | ≥ 1170 (170 ksi) | ≥ 10 | |
| Bar and shapes (≤300 mm) | Aged at H925: 495 °C for 4 h, air cooled, longitudinal | ≥ 1170 (170 ksi) | ≥ 1070 (155 ksi) | ≥ 10 | |
| Bar and shapes (≤300 mm) | Aged at H1025: 550 °C for 4 h, air cooled, longitudinal | ≥ 1070 (155 ksi) | ≥ 1000 (145 ksi) | ≥ 12 | |
| Bar and shapes (≤300 mm) | H1075/H1100/H1150, longitudinal | ≥ 1000 (145 ksi) | ≥ 860 (125 ksi) | ≥ 13 | |
| Bar and shapes (≤300 mm) | H1150M: 760 °C for 2 h, air cooled, then 620 °C for 4 h, air cooled; longitudinal | ≥ 795 (115 ksi) | ≥ 515 (75 ksi) | ≥ 18 | |
| Bar and shapes | Condition A: solution treated at 1040 ± 15 °C and cooled below 32 °C, not aged | — | — | — | |
| Bar, forgings, rings and extrusions | Solution treated by default; for aged delivery the order must state AMS5659 with the H-condition suffix | — | — | — | |
| Plate, sheet and strip | |||||
| Plate, sheet and strip (<4.762 mm) | A693 H900 | ≥ 1310 (190 ksi) | ≥ 1170 (170 ksi) | ≥ 5 | |
| Plate, sheet and strip (15.90–102 mm) | A693 H900 | ≥ 1310 (190 ksi) | ≥ 1170 (170 ksi) | ≥ 10 | Also specified: Hardness 40 HRC – 48 HRC |
Where this grade is recommended
Matched in 1 service conditions; ranks and scores computed from the condition-scoring matrix.
| Service condition | Industry | Temperature | Rank | Score |
|---|---|---|---|---|
| HS fasteners & shafts | Aerospace | 300 – 650 °C | 7 / 9 | 85 |
Designations & equivalents
| W.Nr. (Germany) | 1.4545 |
| EN designation | X5CrNiCuNb15-5 |
| Trade name(s) | 15-5PH / XM-12 |
| ASTM / AISI | A564 / A693 / A705 (Type XM-12) |
| AMS (SAE aerospace) | 5659 / 5826 / 5862 |
Cross-references are common near-equivalents for search and shortlisting; substitution across standards requires clause-by-clause verification. All grades in one cross-reference table →
Applicable standards
6 specifications. Name the standard and its edition on the order.
Guaranteed values and required tests differ between specifications — see Mechanical minima by form for the figures per form.
Frequently asked questions
What is 15-5PH Stainless · UNS S15500?
15-5PH Stainless · UNS S15500 — PH stainless steel. The remelted, cleaner 17-4 — better transverse toughness for aerostructures
What is the maximum service temperature of S15500?
Typically about 315 °C; the practical limit depends on media, stress and design life — acceptance per the governing standard.
What is the tensile strength of S15500?
The specified minimum tensile strength is 1310 MPa for the main product form. Minima for other forms and sizes are listed under "Mechanical minima by form" on this page.
Which standards cover S15500?
ASTM A564/A564M, ASTM A693, ASTM A705/A705M, SAE AMS5659 15-5PH, SAE AMS5862 15-5PH, SAE AMS5826 15-5PH
Where is S15500 typically used?
HS fasteners & shafts (Aerospace)
In which forms is S15500 available?
Tube, plate, strip, bar, forgings, wire and other forms — sizes and delivery condition confirmed per order, with EN 10204 3.1 / 3.2 certification.
Same series
Download PDF datasheet
This grade’s datasheet as an A4 PDF — for filing, printing or forwarding to colleagues.
Download PDF datasheetSupply & enquiry
Tube & pipeφ1 – 219 × 0.25 – 25 mm
Plate4.76 – 80 mm
Barφ8 – 300 mm
Wire & filler metalsφ0.01 – 8 mmFor this grade we can supply, against your service conditions:
- Tube, plate, strip, bar, forgings, wire and more — with size range and lead time
- Chemistry and mechanical test report (EN 10204 3.1 / 3.2)
- Like-for-like alternatives and selection advice
- Applicable standards and inspection scope
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