No.4 Finish
- Commodity name： No.4 Finish
- 200 Series
- 300 Series
- 400 Series
-
Stainless Steel Grades Comparison Table
Grade
Characteristics
Applications
SUS304
Standard 18-8 composition, optimal overall performance, good corrosion resistance
Architectural decoration, food equipment, general hardware, structural components
304/304L
304L: Ultra-low carbon, resists intergranular corrosion, superior weldability
Welded structures, cryogenic vessels, cookware, food processing equipment
Grade
Core Characteristics
Applications
201
Basic high-Mn low-Ni (Mn≈5.5~7.5%), cost ≈70% of 304
Indoor decorative tubes, furniture frames, shelves, lighting fixtures
201J1
Standard 201 composition (Mn≈6.5%, Ni≈1%)
General hardware, structural components in dry environments
201J2
High-copper version (Cu≈0.8~1.2%), enhanced deep-drawing performance
Shallow-stamped tableware, sinks, simple kitchenware
201J3
High-Ni corrosion-resistant version (Ni≈2~2.5%), corrosion resistance ≈80% of 304
Non-coastal outdoor railings, door/window fittings, elevator decorative panels
201J4
High-Mn strengthened version (Mn≈8~10%), improved hardness/strength
Spring plates, low-load fasteners, wear-resistant structural parts
201J5
Nitrogen-strengthened version (N≈0.15~0.25%), optimal overall performance
Light-duty 304 substitute applications (appliance housings, bus handrails)
Performance Ranking
Property
Ranking (Best → Worst)
Corrosion Resistance
J5 > J3 > J2 > 201/J1 > J4
Formability
J2 (high ductility) > J5 > 201/J1 > J3 > J4
Strength/Hardness
J4 (Mn-hardened) > J5 (N-strengthened) > J3 > 201/J1 ≈ J2
Cost
201/J1 (lowest) < J2 < J4 < J3 < J5 (highest)
Property
Ranking (Best → Poorest)
Corrosion Resistance
316L ≈ 316 > 310 > 304L ≈ SUS304 > 302
High-Temperature Performance
310 > 316L > SUS304/304L
Strength/Hardness
302 > 310 > 316L ≈ SUS304
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