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Stainless steel plate

17-4pH alloys are precipitated, quenched, martensitic stainless steels, and this grade has high strength, hardness (up to 300 C/5000 C) and corrosion resistance。After heat treatment, the mechanical properties of the product are more perfect, and the compressive strength can reach up to 1100-1300 mpa (160-190 kSi)。This grade is not intended for use above 300 0C (572 0F) or very low temperatures. It has good corrosion resistance to atmospheric and diluted acids or salts, as is the case with 304 and 430。

3/16" 1/4" 5/16" 3/8" 7/16" 1/2" 9/16" 5/8" 3/4" 7/8" 1"
4.8mm 6.3mm 7.9mm 9.5mm 11.1mm 12.7mm 14.3mm 15.9mm 19mm 22.2mm 25.4mm
 
1 1/8" 1 1/4" 1 1/2" 1 3/4" 2" 2 1/4" 2 1/2" 2 3/4" 3" 3 1/2" 4"
28.6mm 31.8mm 38.1mm 44.5mm 50.8mm 57.2mm 63.5mm 69.9mm 76.2mm 88.9mm 101.6mm

Specs: 17-4PH (UNS S17400)

17-4pH alloy is precipitated, hardened, martensitic stainless steel。

一般属性

17-4pH alloys are precipitated, quenched, martensitic stainless steels, and this grade has high strength, hardness (up to 300 C/5000 C) and corrosion resistance。After heat treatment, the mechanical properties of the product are more perfect, and the compressive strength can reach up to 1100-1300 mpa (160-190 kSi)。This grade is not intended for use above 300 0C (572 0F) or very low temperatures. It has good corrosion resistance to atmospheric and diluted acids or salts, as is the case with 304 and 430。


应用领域

  • Offshore platforms, helicopter decks, other platforms
  • The food industry
  • Pulp and paper industry
  • Aerospace (turbine blade)
  • Mechanical components
  • Nuclear waste barrels

标准

ASTM........A 693
ASME........SA 693
AMS..........5604

耐腐蚀性

The corrosion resistance of 17-4pH alloy is superior to that of any other standard hardened stainless steel plate。In most cases, it is no less resistant to corrosion than 304。

If there is a risk of STRESS corrosion cracks, the higher curing temperature must be above 550°C (1022°F), preferably 590°C(1094°F).。

The optimum tempering temperature in chloride medium is 550°C-1022°F。

The optimal tempering temperature in H2S medium is 590°C-1094°F。

The alloy is vulnerable to corrosion or crack corrosion in static seawater。

It has the same corrosion resistance as class 304L in petrochemical, food processing and paper industries。

化学成分

C Cr Ni Cu Nb/Cb Mn
0.04 16.5 4.5 3.3 0.3 0.7
PREN (%Cr+3.Mo + 16% 3% N) 17 or more

机械性能

热处理 YS 0.2%
N/mm
UTS
N/mm
Min. Typ. Min. Typ.
A 1070 1207 1170 1310
B 790 931 965 1034
热处理 YS 0.2%
ksi
UTS
ksi
  El%
Min. Typ. Min. Typ.   Min. Typ.
A 155 175 170 190   8 14
B 115 135 140 150   10 17

Hardening 496°C (925°F)-4 hours - air cooling
Hardening 593°C (1100°F)-4 hours - air cooling
These are two examples of heat treatment。
If you have any other requirements, please contact us。

High temperature properties
Refer to EN 10088 for the lowest value。
EN features guaranteed at 3/16 "-3".The thickness range is valid。

Temperature ° c.
Temperature ° F
100
212
150
302
200
392
250
482
300
572
YS 0.2% N/mm_ 730 710 690 670 650
ksi 106 103 100 97 95

热处理: hardening 590°C (1094°F)-4 hours - air cooling
This is an example of heat treatment。
If you have special requirements please contact us。

Minimum impact at room temperature

Refer to ASTM A693 for minimum values for hot rolled sheets
ASTM guaranteed value is valid for 3/16 "-3" thickness range。

热处理 KV transverse
J ft.lbf
Hardening 593°C (1100°F) - 4 hours - air cooling 20 15

Minimum hardness at room temperature

Refer to ASTM A693 for minimum room temperature values for hot-rolled plates
ASTM values are valid in the 3/16 "-3" thickness range。

物理性能

After heat treatment: hardening 480°C (896°F) - 1 hour - air cooling, the following physical characteristics are obtained:

Interval temperature Thermal expansion
ax10-6°C-1
  °C °F Thermal conductivity
w.m-1.K-1)
0-100 10.8   20 68 14
0-200 11   100 212 16
0-300 11.3   200 392 18.5
0-400 11.6   300 572 20
0-500 12   400 752 22
  500 932 23
Interval temperature Thermal expansion
ax10-6°C-1
  °C °F Young's modulus
(GPa)
0-100 10.8   20 68 197
0-200 11   100 212 193
0-300 11.3   200 392 186
0-400 11.6   300 572 180
0-500 12   400 752 175
  500 932 170

Room temperature characteristics
Resistivity: 80 μ*.cm
Specific heat capacity: 460 J.kg-1.K-1
Tension coefficient :77 GPa
This alloy is magnetic。

热处理

热处理
Martensitic transformation
指标
Ms: 130 ° C (266 ° F)
Mf: 30 ° C (86 ° F)

Solid annealing
1050°C +/-25°C (1925°F+ /-50°F) - 30 min up to 1 hour.
1050°C +/-25°C (1925°F+ /-50°F) -30 minutes -1 hour
Air-cooled/oil-hardened, below 25°C (76°F)

Curing/tempering
After heat treatment :480°C (896°F) - 1 hour - air cooling, the highest mechanical properties can be obtained。
Higher ductility is achieved at a higher curing temperature of 620°C (1148°F)。

Hardness/Temperature tempered for 4 hours After Austenitizing at 1040°C (1904°F) for 30 Min quenched 100 ° C/SEC (212 ° F/SEC).

热处理

加工
Hot forming
Hot forming should be carried out in the temperature range of 950-1200°C (1742-2192°F)。Complete heat treatment includes solid melt annealing, cooling (below 25°C) and curing (at established temperature)。

Cold forming
Cold forming can only be carried out on the soft sheet, and the conditions are more strict。After cold working, stress corrosion resistance can be enhanced by secondary curing at quenching water and hardening temperature。

The processing procedures are as follows: rolling, bending, hydrogen reforming, etc. (soft state)。

切割
Thermal cutting (plasma, saw, etc.): This grade of cutting procedure should be appropriate to allow for thermal deterioration。After cutting, grind to remove the oxide layer。

Mechanical cutting: cutting, stamping, cold saw, etc。

焊接

17-4PH The alloy can be welded as follows: SMAW, GTAW, PAW and GMAW. The SAW welding can be carried out only after preliminary tests (check for cracks and toughness of weld metal)。

The possibility of hot cracking and thermal metamorphism of weld metal is reduced due to the curing of ferrite。

In general, no preheating is required and the intermediate temperature should be controlled at 120°C (248°F). After a complete heat treatment (solid melt annealing + quenching hardening), the toughness will be enhanced。

Due to its own martensitic structure characteristics, the low oxygen content in the weld metal keeps good toughness and ductility。In order to avoid cold cracking, hydrogen intervention should be avoided as much as possible。

17-4PH Alloys can be mixed with the same filler metal (E 630 (AWS A5.4) ?ER 630 (AWS A5.9) Welding。

If the welding does not need to consider17-4PHThe austenite filling metal can also be used, and there is no need for heat treatment afterwards。

机械加工

We can be treated with solution or quenched water, hardening state17-4PH The alloy is machined, and the processing conditions vary with the hardness of the material。We usually use high - speed cutting tools or lubricated carbonized knives for machining。If the customer is very strict with tolerances, we should also take into account dimensional changes that may occur during heat treatment。

说明
The technical information provided here reflects our best and most comprehensive knowledge at the time of compiling this information, but the content may change slightly as our research on corrosion grade products progresses。

We suggest you reconfirm the above information when you make an inquiry or place an order。In addition, every product has some special circumstances when it is used。The data provided herein are only descriptions of the products, which can only be regarded as our guarantee and commitment when our company makes written documents。