17-4 PH / 1.4542 Stainless Steel Pipe

Gnee Stainless Steel is one of the most reputable manufacturers and suppliers of 17-4 PH / 1.4542 stainless steel pipes in China. We sincerely invite you to purchase high-quality 17-4 PH / 1.4542 stainless steel pipes directly from our factory. With abundant stock available, we ensure prompt supply at any time. We are committed to delivering excellent service and highly competitive pricing.

 

The 17-4 PH pipes we supply feature precise chemical composition control (C ≤ 0.07%, Cr 15.0–17.5%, Ni 3.0–5.0%, Cu 3.0–5.0%, Nb+Ta 0.15–0.45%). These pipes exhibit outstanding corrosion resistance, superior to standard martensitic stainless steels, especially in environments containing mild acids, alkalis, and chlorides. In addition, through aging heat treatments such as H900, H1025, or H1150, their mechanical properties can be flexibly adjusted, achieving tensile strength in the range of 930–1310 MPa.

 

 

Our 17-4 PH seamless pipes offer extremely high dimensional accuracy, with outer diameter tolerance controlled within ±0.03 mm and wall thickness tolerance within ±0.02 mm. The product specifications cover outer diameters from 6 mm to 219 mm and wall thicknesses from 1.0 mm to 20 mm. We provide fixed lengths ranging from 3000 mm to 6000 mm and also offer customized cutting services according to customer requirements. All products undergo solution annealing, non-destructive testing, and pickling & passivation surface treatment, and are supplied with EN 10204 3.1 Mill Test Certificates (MTC).

 

17-4 PH Stainless Steel Pipe Chemical Composition (Typical Weight %)

Element	Symbol	Min (%)	Max (%)
Chromium	Cr	15.00	17.50
Nickel	Ni	3.00	5.00
Copper	Cu	3.00	5.00
Manganese	Mn	-	1.00
Silicon	Si	-	1.00
Niobium + Tantalum	Nb + Ta	0.15	0.45
Carbon	C	-	0.07
Phosphorus	P	-	0.040
Sulfur	S	-	0.030
Iron	Fe	Balance	Balance

 

Mechanical Properties (At Room Temperature)

The mechanical properties of 17-4 PH are highly dependent on the heat treatment (aging condition).

Condition	Tensile Strength (Rm)	Yield Strength (Rp 0.2)	Elongation (A5)	Hardness (Rockwell)
Unit	MPa (min)	MPa (min)	% (min)	HRC
Solution Annealed (Cond. A)	N/A	N/A	N/A	38 HRC (Max)
H900	1310	1170	10	40 - 47
H1025	1070	1000	12	35 - 42
H1075	1000	860	13	32 - 38
H1150	930	725	16	28 - 37

 

1.4542 Stainless Steel Pipe Physical Properties

Property	Value	Unit
Density	7.75	g/cm³
Melting Range	1404 - 1440	°C
Modulus of Elasticity	196	GPa
Thermal Conductivity (at 100°C)	18.4	W/m·K
Specific Heat (0-100°C)	460	J/kg·K
Electrical Resistivity	0.80	μΩ·m
Magnetic Permeability	Strongly Ferromagnetic	-

 

17-4 PH Stainless Steel Equivalent Designations

Standard	Designation
UNS	S17400
EN / DIN	1.4542
Type	AISI 630
Common Name	17-4 PH
AFNOR	Z6CNU17-04

 

17-4 PH / 1.4542 Stainless Steel Pipe Heat Treatment Conditions (Aging)

Condition	Temperature (°F)	Temperature (°C)	Time (Hours)	Cooling
Solution Annealed	1900 ± 25	1038 ± 14	0.5	Air / Oil
H900	900	482	1	Air
H1025	1025	552	4	Air
H1075	1075	580	4	Air
H1150	1150	621	4	Air

 

Can 17-4 PH stainless steel tubing be welded?

Yes, it possesses excellent weldability and can be welded using standard methods such as Gas Tungsten Arc Welding (TIG/GTAW) or Gas Metal Arc Welding (MIG/GMAW). Unlike many martensitic stainless steels, it typically does not require preheating. However, to achieve strength levels equivalent to the base metal, post-weld heat treatment (PWHT)-typically an aging treatment-is required.

Is 17-4 PH stainless steel magnetic?

Yes. 17-4 PH is a martensitic stainless steel, which means it is strongly magnetic in all conditions (both solution-annealed and aged).

What is the maximum service temperature for 17-4 PH?

Continuous service at temperatures exceeding 600°F (316°C) is not recommended. Prolonged exposure to elevated temperatures can lead to a significant reduction in toughness and result in embrittlement.

 

Lead Time

The lead time for 17-4 PH is typically longer than that for standard 304/316 grades, primarily due to the heat treatment process involved.
Stock Items: 3 – 7 business days. This timeframe covers inspection, repackaging, and outbound processing.
New Production: 4 – 6 weeks. This includes piercing, cold drawing/cold rolling, and solution treatment.

 

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Inspection & Testing

Chemical Analysis: PMI (Spectroscopic Analysis)
Tensile Testing: Measures Yield Strength and Tensile Strength (Rm).
Ultrasonic Testing (UT): Inspects the interior of the pipe wall for cracks, slag inclusions, or porosity.
Eddy Current Testing (ET): Used to detect surface and near-surface defects.
Hydrostatic Testing (Hydro): Ensures the pipe remains leak-free under high pressure (typically in accordance with ASTM A530 standards).

 

Packaging & Protection

All pipe ends are fitted with plastic caps to prevent the ingress of dust or debris and to protect beveled ends.
Individual Packaging: Each pipe is enclosed in a protective plastic sleeve.
Bundle Wrapping: After bundling, the pipes are wrapped in woven bags or waterproof tarpaulins.
Bundling is secured using steel or nylon straps, with cardboard or rubber padding placed at the strapping points to prevent indentation.
Wooden Case Packaging: For thin-walled pipes, high-precision pipes, or air freight shipments, export-standard, fumigation-free wooden cases are mandatory.