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17-4PH UNS S17400/W.Nr:1.4542 stainless steel

  • Place of Origin Jiangsu,China
  • Model Number 17-4PH
  • Trade Names UNS S17400/W.Nr:1.4542
  • Dimensions Customized Size
  • Delivery Conditions Grinding, Polished. Bright.
  • Avaliable Shapes Bar,Tube,Pipe,Wire,Foil,Strip,Ring,Fastener.Customized
  • MOQ 50~200 (KG)
  • Production Standards AMS 5604,5643,5825, ASME SA 564,693,705, ASME Type 630,A564,A693, A705,Type 630 Condition A-H1150
  • Packaging Details Wooden Case, or as per Client's request
  • Payment Terms L/C, T/T, Western Union, MoneyGram
  • Trade Terms FOB, CIF, DUP, EXW
  • Delivery Time 3~30 days

Overview


Alloy 17-4PH (UNS S17400), Type630, is a chromium-nickel-copper precipitation-hardening martensitic stainless steel with an addition of niobium. 17-4PH combines high strength and hardness with good corrosion resistance.

The alloy is furnished in the solution annealed condition(Condition A). It should not be used at temperatures above 572°F (300°C)or for cryogenic service. Optimal mechanical properties can be obtained by subjecting the alloy to age hardening heat treatments. Heat treatment in the 900°F (482°C) range produces the highest strength.

The corrosion resistance of Alloy17-4PH is comparable to 304stainless steel in most environments,and is generally superior to the 400series stainless steels. It is used in applications where the combination of moderate corrosion resistance and unusually high strength are required.Alloy 17-4PH can be easily welded and processed by standard shop fabrication practices. It is magnetic.



Limiting Chemical Composition, %


Iron..............................................................................................................................................................................................69.91-78.85

Nickel...............................................................................................................................................................................................3.00-5.00

Chromium...................................................................................................................................................................................15.00-17.50

Copper.............................................................................................................................................................................................3.00-5.00

Manganese.....................................................................................................................................................................................1.00 max.

Carbon.............................................................................................................................................................................................0.07 max.

Silicon..............................................................................................................................................................................................1.00 max.

Sulphur.............................................................................................................................................................................................0.03 max.

Phosphorus......................................................................................................................................................................................0.04 max.

Niobium plus Tantalum...................................................................................................................................................................0.15-0.45



Physical properties 


Density

Modulus of Elasticity

Thermal Conductivity

Specific Heat

Melting Range

7.75 g/cm³

196 GPa

18.3 W/m.K

460 J/kg-°C

1404 – 1440°C



Mechanical Properties


Condition

Tensile Strength (MPa)

Yield strength

Modulus of elasticity

Hardness Brinell (HB)

Solution Treated

1105 typ

1000 typ

15 typ

363 max

Condition 900

1310 min

1170 min

10 min

388 min

Condition 1150

930 min

724 min

16 min

277 min



Corrosion resistance


The corrosion resistance of Alloy 17-4PH is comparable to 304 stainless steel in most environments, and is generally superior to the 400 series stainless steels. It is used in applications where the combination of moderate corrosion resistance and unusually high strength are required. Alloy 17-4PHhas corrosion resistance comparable to 304L in some chemical, dairy, food,paper and petroleum applications.Alloy 17-4PH in the solution-annealed condition should not generally be put in service. The alloy is subject to brittle fractures and more sensitive to chloride stress corrosion cracking than the aged material.If risks of chloride stress corrosion cracking are present the higher aging temperatures should be selected over 1022°F (550°C), preferably 1094°F(590°C). 1022°F (550°C) is the recommended tempering temperature in chloride service. 1094°F (590°C) is preferred in H2S media.Alloy 17-4PH is subject to crevice corrosion and pitting attack when exposed to stagnant seawater for a duration of time.



Heat treatment


Solution treatment — Grade 630 stainless steels are heated at 1040°C for 0.5 h, then air-cooled to 30°C. Small sections of these grades can be oil quenched.

Hardening — Grade 630 stainless steels are age-hardened at low temperatures to achieve the required mechanical properties. During the process, superficial discoloration occurs followed by shrinkage at 0.10% for condition H1150, and 0.05% for condition H900.

The table below shows the typical mechanical properties of grade 630 steels after solution treatment and age hardening:


Cond.

Temp(C)

Time (h)

Typical Hardness Rockwell C

Tensile Strength (MPa)

A

Ann


36

1100

H900

482

1

44

-

H925

496

4

42

1170-1320

H1025

552

4

38

1070-1220

H1075

580

4

36

1000-1150

H1100

593

4

35

970-1120

H1150

621

4

33

930-1080



Available Forms


We provide you with a variety of product forms, including but not limited to


● Bar & Rod

● Pipe & Tube

● Coil & Strip

● Plate & Sheet & Circle

● Wire & Welding

● Fitting (Flange, Elbow, Tee...)

● Customize


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