Welcome to RM Aerospace Alloys. Manufacturer of a wide range of Round Bars, Stainless Steel Pipe, Aluminium Alloys, Stainless Steel Rod, Bronze Alloys, Alloy Steel Round Bar, Duplex Steel, Alloy Steel Bar, Aluminium Plate, Boiler Steel Plates, Nickel Alloy Products, Titanium Products.

17-4PH

17-4PH

As supplied 1 7-4PH is usuall in the solution treated c-ondition (Condition A). lt can be heat treated at different temperatures to offer a wide range of properties. We also hold stock in H1 t 50+H1150, and annealed block.

Solution Treatments.
- TEMPERATU TIME - BRINELL ROCKWELL C
A 1 038'C 1/2 Oll/Air to below 32"C 363 max 39 max
H900 480'C 1 Air 420 44
H925 495.C 4 Air 409 42
H1025 55.C 4 Air 352 38
H'1075 580'C 4 Air 341 36
H1100 595.C 4 Air 332 35
H 1150 621.C 4 Air 311 33
H 1150+H 1'150 760"C 760"C 4 followed by 4 Air Air 302 33
H1'150-M 760" C 620"C 2 followed by 4 Air Air 277 27
Theoritic Weight of Stainloss Steel Round Bars
- A H900 H925 H1025 H1075 H1100 H1150 H1150 + H1150 H1150 M
Tensile Strength N/mm2 1034 1380 1310 117 114 103 1000 965 860
0.2% YS N/mm2 760 127 120 114 1103 930 1 860 760 585
Reduction of Area 30-60 50 54 56 58 58 60 60 68
Elongation s15 14 14 15 16 17 19 20 22

Corrosion Resistanc

174PH slainless steel has excellent corrosion resistanc€. Conosion tests and service experience have shown that in all aged conditions it is superior to standard hardenable stainless grades such as 42A, 431 and 410. lts conosion resistance is comparable to grade 304 Stainless

Welding

Arc and resistance welding processes used on standard grades of stainless steel are applicable to 174PH stainless steel. The low hardness enables sections, up to 100mm, to be welded without requiring prc heailng.

Fabtieation

17-4PH Condition is suitable for limited cold forming, H1100, H1150 and overaged conditions are more suitable when severe cold forming is required.

Machining

1 7-4PH Condition has machining characteristics similar to stainless grades 302, 304 and 410. The high hardness and strength in Condifion H900 is the most difficuh to machine and the material should be machined at 60% of the rate which is used for Condition A,

Nitriding

To increase the reslstance to surface wear, lvith a slight decrease in conosion resistance, 17-4PH stainless sleel can be nitrided. An approximate hardness of g/67HRc can be achieved, with a surface hardness depth of up to 0.15mm when nitrided at 540'C, while still maintaining a high core strength