What material is 1.4542 equivalent to?
Jul 10, 2025
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What Is 1.4542 Material?
EN 1.4542 stainless steel, also known as X5CrNiCuNb16-4, is a precipitation hardened (PH) martensitic stainless steel with a hardness of approximately 43 HRC. The grade has a hardening peak temperature of 480°C, making it easy to age after machining in the initial solution state (Condition A). The grade is also available in pre-treated and/or aerospace grade remelted versions. Widely used in aerospace, marine, chemical and precision engineering industries.
What Material Is 1.4542 Equivalent To?
| Standard System | Equivalent Designation |
|---|---|
| UNS | S17400 |
| AISI / SAE | 17-4PH |
| ASTM | ASTM A564 Type 630 |
| DIN (Germany) | X5CrNiCuNb16-4 |
| ISO | X5CrNiCuNb16-4 |
| JIS (Japan) | SUS 630 |
What is the chemical composition of 1.4542 stainless steel?
|
630 (1.4542, 17-4 PH) Chemical Composition |
|||||||
| Grade | C | Mn | Si | P | S | Cr | Ni |
| 630 (1.4542) | %0.07max | %1.0 | %0.7 | %0.4 | %0.03max |
%15-17 |
%3-5 |
1.4542 stainless steel Physical Properties
| Property | Value |
|---|---|
| Density | 7.8 g/cm³ (0.282 lb/in³) |
| Melting Range | 1404-1440°C (2560-2625°F) |
| Modulus of Elasticity | 196 GPa (28.5 × 10⁶ psi) |
| Electrical Resistivity at 20°C | 0.80 Ω·mm²/m (31.5 μΩ·in) |
| Thermal Conductivity at 100°C | 18.3 W/m·K (10.6 BTU·in/ft²·hr·°F) |
| Coefficient of Thermal Expansion (20-100°C) | 10.8 × 10⁻⁶ /K (6.0 × 10⁻⁶ /°F) |
| Specific Heat Capacity at 20°C | 460 J/kg·K (0.11 BTU/lb·°F) |
| Magnetic Permeability | Ferromagnetic in all conditions |
What is the hardness of 1.4542?
Depending on the heat treatment, Rockwell hardness ranges from HRC 28 to 44.
It is delivered in the following conditions:
- Condition A – Max 38 HRC
- Condition H 900 – 40-48 HRC
- Condition H 925 – 38-46 HRC
- Condition H 1025 – 35-43 HRC
- Condition H 1075 – 31-40 HRC
- Condition H 1100 – 31-40 HRC
- Condition H 1150 – 28-38 HRC
Can 1.4542 be heat treated?
Yes, it is hardened by precipitation heat treatment, with common conditions including H900, H1025, H1150.
What is the density of 1.4542 Stainless Steel?
| Grade : | X5CrNiCuNb16-4 | ||||||
| Number: | 1.4542 | ||||||
| Classification: | Martensitic and precipitation-hardening steels - special grade | ||||||
| Density: | 7.8 g/cm ³ | ||||||
| Standard: |
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Need Certified 1.4542 / 17-4PH Material?
At Gnee Stainless Steel, we supply 1.4542 / 17-4PH stainless steel in bars, plates, sheets, and machined parts, fully certified to EN, ASTM, and AMS standards.
🔹 Heat-treated in H900–H1150 conditions
🔹 Tight dimensional tolerances for critical parts
🔹 Ultrasonic tested and inspected
🔹 Fast global shipping
📞 Contact our team today for a quote, material certificate, or machining solution tailored to your project.
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