301/302 Stainless Steel Bar

Product Overview

301 and 302 stainless steel bars are high-carbon austenitic steels designed for excellent formability and high strength, especially in applications requiring good corrosion resistance and high tensile strength. 💪 301 is known for its high strength and excellent weldability, making it ideal for forming and bending. 302, on the other hand, offers a bit more resistance to corrosion and is commonly used in applications involving springs and highly stressed components.

301 vs 302 – Key Differences

Property	301 Stainless Steel	302 Stainless Steel
Nickel Content	6.0 – 8.0%	8.0 – 10.0%
Carbon Content	≤ 0.15%	≤ 0.08%
Strength	Higher tensile strength	Moderate tensile strength
Corrosion Resistance	Good for many environments	Better in more corrosive environments
Applications	Springs, fasteners, structural components	Springs, wire forms, high-stress applications

Available Sizes

• 📏 Type: Round bar, Square bar, Flat bar, Hexagonal bar
• 📐 Diameter (Round): 5mm – 200mm
• 📏 Length: 1000mm – 6000mm or customized
• 🎯 Tolerances: h9, h10, h11 (available upon request)
• 📚 Standards: ASTM A276, ASTM A479, EN 10088-3

Chemical Composition

Element	301 (%)	302 (%)
C	≤ 0.15	≤ 0.08
Si	≤ 1.00	≤ 1.00
Mn	2.00 – 3.00	2.00 – 3.00
P	≤ 0.045	≤ 0.045
S	≤ 0.030	≤ 0.030
Cr	16.0 – 18.0	17.0 – 19.0
Ni	6.0 – 8.0	8.0 – 10.0

Mechanical Properties

Property	301	302
Tensile Strength (MPa)	≥ 520	≥ 510
Yield Strength (MPa)	≥ 275	≥ 250
Elongation (%)	≥ 40%	≥ 40%
Hardness (HB)	≤ 210	≤ 200

Applications

7. Surface Finish

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

8. Processing Services

• ✂️ Length cutting to customer specifications
• 🧽 Surface grinding and polishing
• 🔩 CNC machining and threading
• 📏 Custom tolerances and straightening
• 📦 Bulk packaging for shipping