1.4542 steel plate 630 is a well-established precipitation hardening martensitic stainless steel capable of achieving very high strength and hardness after a relatively simple heat treatment. 1.4542 steel plate 630 offers excellent corrosion resistance combined with a structured range of mechanical property levels depending on the precise heat treatment applied.
The 1.4542 steel plate 630 materials can be readily machined and fabricated in the softer tempers and can then be heat-treated to exceptional strength and dimensional stability. 1.4542 steel plate 630 is widely used in the chemical, petrochemical, offshore, paper, and aerospace industries making best use of its outstanding corrosion resistance, wear resistance, strength and hardness.
Main fields of application of 1.4542
Surgical and dental instrument, screwdriver.
17- 4 retains a high strength of precipitation hardening stainless steels a majority of applications are within the aerospace sector and OAG applications
Valves and engine components
Turbine blades
Gears
Shafts
Aircraft structures
Chemical composition of 1.4542
| Cr | 15,0 - 17,0 |
| Ni | 3,0-5,0 |
| Cu | 3,0-5,0 |
| C | max 0,070 |
Characteristics of 1.4542
| annealed | specification values |
| tensile strength Rm | 1000-1100 MPa |
| elongation A | 5 - 8 |
| Aged at 480 ⁰C | specification values |
| tensile strength Rm | 1150 – 1350 MPa |
| elongation A | 7 - 15 |
Heat treatment
Alloy 17-4PH is provided in the solution-annealed condition (Condition A). Mechanical properties may be improved by subsequent age hardening treatments. These aging treatments are commonly described as conditions H900, H1025, H1075, H1150, H1150M and H1150D.
Mechanical Properties
| Condition | UTS | 0.2% Yield | Elongation | Reduction of area | Hardness Brinel |
| H900 | 190.000 | 170.000 | 10 | 40 | 388 |
| H1025 | 155.000 | 145.000 | 12 | 45 | 331 |
| H1075 | 145.000 | 125.000 | 13 | 45 | 311 |
| H1150 | 135.000 | 105.000 | 16 | 50 | 277 |
| H1150m | 115.000 | 75.000 | 18 | 55 | 255 |
| H1150-D | 125.000 | 105.000 | 16 | 50 | 255 |
Delivery program
Hempel Special Metals are able to supply this grade in many of the conditions in the following forms :
Sheet/ Plate/ strip 0.2mm < 90mm
Bars 6.35mm Dia < 250mm Dia
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