Key Feature

The Balanced Performance-Economy Bar Stock. Offers intermediate corrosion resistance between 201 and 304 grades with better formability than 201 at a moderate price point.

An economical alternative for applications requiring better corrosion resistance than 201 but where 304 may be over-specified.

Common Designations

UNS S20200
AISI 202
JIS SUS202
GB 1Cr18Mn8Ni5N (Chinese)

Less common than 304 but more standardized than some 200-series variations.

Chemical Composition (Typical wt.%)

C: ≤ 0.15
Cr: 17.0 - 19.0
Ni: 4.0 - 6.0
Mn: 7.5 - 10.0
N: ≤ 0.25
Si: ≤ 1.00

Higher nickel and chromium than 201, but lower than 304. Manganese remains high for austenite stability.

Mechanical Properties

Tensile Strength: ≥ 620 MPa
Yield Strength: ≥ 275 MPa
Elongation: ≥ 40-50%
Hardness: ≤ 241 HB
Machinability: 60% of B1112 steel

Similar to 201 in strength, with potentially better ductility due to higher nickel content.

Physical Properties

Density: 7.80 g/cm³
Melting Range: 1371 - 1399 °C
Thermal Expansion: 16.0 × 10⁻⁶/K (20-100°C)
Magnetic Response: Generally non-magnetic when annealed

Similar density to 201; may become slightly magnetic when cold worked.

Available Forms

Rounds: 6mm - 150mm diameter
Squares: 6mm - 80mm
Hexagons: 6mm - 50mm
Flats: Various sizes
Limited availability in large sizes

Generally more limited size range than 304 due to market demand.

Surface Conditions

Hot Rolled: As-rolled condition
Cold Drawn: Bright finish
Polished: Decorative finishes
Peeled: Improved surface for machining

Surface finishes similar to other austenitic grades.

Corrosion Resistance

Good resistance to mild atmospheric conditions and some chemicals. Better than 201 but inferior to 304, especially in chloride-containing environments.

Suitable for indoor applications and mild outdoor environments without coastal or industrial pollution.

Machining Characteristics

• Better machinability than 201• Moderate work hardening• Good chip control• Requires proper tooling• Surface finish generally good

Higher nickel content improves machinability compared to 201.

Welding Characteristics

Fair to good weldability
Possible Sensitization concerns
Post-Weld Cleaning recommended
Proper Filler Metals required

Requires more care than 304 welding; matching filler metals important.

Key Standards

GB/T 1220 (Chinese standard)
JIS G4303 (Japanese standard)
Custom specifications common
Limited ASTM coverage

Quality and consistency may vary between manufacturers; less standardized than 304.

Common Applications

• Architectural Elements: Trim, moldings, decorative columns, handrails
• Household Goods: Kitchen utensils, cookware, sink accessories
• Consumer Products: Appliance trim, furniture components, decorative hardware
• Automotive: Decorative trim, non-structural components
• General Manufacturing: Fasteners, brackets, display components
• Construction: Non-structural supports, decorative elements
• Hardware: Bolts, screws, nuts (non-critical applications)

Ideal for cost-sensitive applications where appearance and moderate durability are priorities.