17-4PH, Duplex 2205 & Super Duplex 2507 Stainless Steel Bar

Product Overview

17-4PH (SUS630), Duplex 2205, and Super Duplex 2507 stainless steel bars are high-performance alloys designed for demanding applications requiring high strength, excellent corrosion resistance, and superior mechanical properties. 🏗️ 17-4PH is a precipitation-hardening alloy widely used in aerospace, chemical, and food processing industries. Duplex 2205 and Super Duplex 2507 are designed for use in highly corrosive environments like seawater, chemical processing, and oil & gas. They combine high strength and outstanding resistance to pitting, crevice, and stress corrosion.

Available Sizes

• 📏 Type: Round bar, Square bar, Flat bar, Hexagonal bar
• 📐 Diameter (Round): 6mm – 250mm
• 📏 Length: 1000mm – 6000mm or customized
• 🎯 Tolerances: h9, h10, h11 (available upon request)
• 📚 Standards: ASTM A276, ASTM A479, ASTM A564, EN 10088-3

Chemical Composition

Element	17-4PH (%)	Duplex 2205 (%)	Super Duplex 2507 (%)
C	≤ 0.07	≤ 0.03	≤ 0.03
Si	≤ 1.00	≤ 1.00	≤ 1.00
Mn	≤ 1.00	≤ 2.00	≤ 2.00
P	≤ 0.04	≤ 0.03	≤ 0.03
S	≤ 0.03	≤ 0.02	≤ 0.02
Cr	15.0 – 17.5	22.0 – 23.0	24.0 – 26.0
Ni	3.0 – 5.0	4.5 – 6.5	6.0 – 7.0
Mo	3.0 – 5.0	3.0 – 4.0	3.0 – 4.0
Cu	≤ 1.0	—	—

Mechanical Properties

Property	17-4PH	Duplex 2205	Super Duplex 2507
Tensile Strength (MPa)	≥ 1000	≥ 620	≥ 800
Yield Strength (MPa)	≥ 800	≥ 450	≥ 550
Elongation (%)	≥ 15%	≥ 25%	≥ 25%
Hardness (HB)	≤ 350	≤ 290	≤ 300

Features & Advantages

• ✅ High strength, excellent fatigue and stress corrosion resistance
• ⚙️ Ideal for use in highly corrosive environments like seawater and chemicals
• 🔥 Excellent weldability and formability (especially for 2205 and 2507)
• 🛠️ Duplex 2205 offers superior resistance to pitting and crevice corrosion
• 🌟 Super Duplex 2507 offers excellent resistance to chloride stress corrosion cracking

Applications

• 🚢 Marine and offshore equipment
• ⚙️ Oil & gas industry components
• 🔧 Aerospace and automotive parts
• 🏭 Chemical processing equipment
• 📦 High-performance valves, pumps, and heat exchangers

Surface Finish

• 🖤 Black
• 🧼 Pickled
• ✨ Bright
• 🔧 Polished (180#, 240#, 320#)
• 🌀 Peeled / Turned / Ground

Processing Services

• ✂️ Length cutting to customer specifications
• 🧽 Surface grinding and polishing
• 🔩 CNC machining and threading
• 📏 Precision tolerance control
• 📦 Custom packaging for bulk shipments