17-4 Stainless Steel Bar

Description

What Is 17-4 Stainless Steel Bar?

17-4 PH (Precipitation Hardening) Stainless Steel Bar, also known as Grade S17400 or 1.4542, is a martensitic stainless steel that offers an exceptional combination of high strength, hardness, and corrosion resistance.

This alloy is strengthened through heat treatment, delivering properties that outperform many conventional stainless grades. It is magnetic, weldable, and ideal for demanding structural and mechanical components.

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Why Choose 17-4 PH Stainless Steel Rod?

• Better Corrosion Resistance than 410, 420

• Higher Strength than 304 & 316

• Heat Treatable (H900 to H1150)

• Magnetic even after heat treatment

• Excellent Machinability in annealed condition

• Resistant to stress corrosion cracking

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Available Sizes

Diameter	6 mm – 300 mm
Length	1000 mm – 6000 mm (customized available)
Shape	Round / Flat / Hex / Square
Surface	Peeled / Polished / Turned / Ground

Technical Specifications

Standard	ASTM A564 / AMS 5643 / EN 10088-3
Grade	17-4 PH / S17400 / 1.4542
Density	7.75 g/cm³
Tensile Strength	≥1310 MPa (H900)
Yield Strength	≥1170 MPa (H900)
Hardness	HRC 40–44 (H900)
Condition	Annealed / H900 / H1025 / H1075 / H1150

Heat Treatment Options for 17-4PH Bar

Condition	Temperature (°F/°C)	Time	Hardness (HRC)
H900	900°F / 482°C	1 hr	42–44
H1025	1025°F / 552°C	4 hr	38–40
H1075	1075°F / 580°C	4 hr	34–36
H1150	1150°F / 621°C	4 hr	28–32

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Applications of 17-4 Stainless Steel Bar

• Aerospace structural parts

• Turbine blades and jet engines

• Marine shafts, pumps, valves

• Nuclear reactor components

• Injection molding tools

• Precision gears, pins, and fixtures

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Comparison with Other Stainless Steel Grades

Grade	Type	Hardness (HRC)	Corrosion Resistance	Strength	Weldability	Magnetic
17-4 PH	Martensitic PH	28–44 (HT)	★★★★☆	★★★★★	★★★★☆	✅ Yes
304	Austenitic	≤ 20	★★★★☆	★★☆☆☆	★★★★★	❌ No
316	Austenitic	≤ 20	★★★★★	★★☆☆☆	★★★★★	❌ No
420	Martensitic	50–55	★★☆☆☆	★★★★☆	★★☆☆☆	✅ Yes
440C	Martensitic	55–60	★★☆☆☆	★★★★★	★★☆☆☆	✅ Yes

✅ = Magnetic | ★★★★★ = Excellent

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FAQs about 17-4 Stainless Steel Bar

Q1: Can 17-4PH stainless steel be used in marine environments?
A: Yes, it offers good resistance to saltwater corrosion, especially when properly passivated.

Q2: Is 17-4 magnetic after heat treatment?
A: Yes, it remains magnetic in all heat treatment conditions.

Q3: What is the difference between 17-4 and 316 stainless steel?
A: 316 has better corrosion resistance, but 17-4PH is significantly stronger and harder.

Q4: Can I weld 17-4 stainless steel?
A: Yes, it is weldable. But post-weld heat treatment is required to restore properties.

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