Polished Black Surface Round Bar Rod 201 202 304 Grade Stainless Steel

1.4301 201 202 304 polished stainless steel black surface round bar rod

HAOSTEEL is one of the most professional manufacturer and supplier of 201 202 304 304L 316 316L 310S 410 420 430 stainless steel bar.

Description:
Type 201 stainless steel is an austenitic chromium-nickel-manganese stainless alloy. It was developed mid century to conserve nickel and it is used as an alternative to type 301 in some tempered applications. Because of 201’s relatively high yield strength in the annealed condition, use of 201 is limited. Type 201 is generally used in the tempered condition particularly for springs and fasteners. 201 Stainless will retain a comparable ductility to 301 even with the higher yield strength

201 stainless steel bar is widely used in hardware, machinery, petroleum, chemical industry, shipbuilding, Marine industry, boiler, heat exchanger, aerospace and aviation, environmental protection, high temperature resistance, low temperature refrigeration, corrosion resistance, automobile, medicine, food, electricity, water conservancy, construction, fertilizer urea, nuclear power, new energy equipment and other industries, favored by users.
201 stainless steel, characterized by acid and alkali resistance, high density, no bubble and pinhole polishing, is a quality material for the production of various watch case and band bottom cover.201 stainless steel is mainly used for decorative pipe, industrial pipe and some products with shallow drawing.

Chemical composition:

Physical Properties
Density: 0.283 lbs/in3 7.81 g/cm3
Electrical Resistivity: microhm-in, (microhm-cm): 27.0 (68.5)
Specific Heat: BTU/lbs./°F (kJ/kg/K):
32-212 °F (0-100 °C): 0.12 (0.50)
Thermal Conductivity, BTU/hr/fl/ft2/°F (W/m/K):
At 212 °F (100 °C): 9.4 (16.2)
At 932 °F (500 °C): 12.4 (21.4)
Mean Coefficient of Thermal Expansion, in./in./ °F (|jm/m/K)) 32-212 °F (0-100 °C)8.7x 10'6 (15.7)
32 - 600 °F (0 - 315 X) 9.7 x 10'6 (17.5)
32 -1000 °F (0- 538 °C) 10.2 x 10 6 (18.4)
32 -1200 °F (0- 649 °C) 10.5 x 10_6 (18.9)
32-1600 T (0 - 871 X) 11.3 x 10-6 (20.3)
Modulus of Elasticity, ksi (MPa)
28.6 x 103 (197 x 103)
Magnetic Permeability, H=200 Oersteds: Annealed < 1.02 max Melting Range: 2550- 2650 °F (1399 -1454 °C)

Mechanical Properties at Room Temperature
Annealed Condition
Ultimate Tensile Strength: 95 KSI min (655 MPA min)
Yield Strength (0.2% Offset): 38 KSI min (260 MPA min) Elongation: 40%min Hardness: B95 max
Tempered 1/16 Hard
Ultimate Tensile Strength: 95 KSI min (655 MPA min)
Yield Strength (0.2% Offset): 45 KSI min (310 MPA min) Elongation: 40% min
Tempered 1/8 Hard
Ultimate Tensile Strength: 100 KSI min (690 MPA min)
Yield Strength (0.2% Offset): 55 KSI min (380 MPA min) Elongation: 45% min
Tempered 1/4 Hard
Ultimate Tensile Strength: 125 KSI min (860 MPA min)
Yield Strength (0.2% Offset): 75 KSI min (515 MPA min) Elongation: 25% min
Tempered 1/2 Hard
Ultimate Tensile Strength: 150 KSI min (1035 MPA min)
Yield Strength (0.2% Offset): 110 KSI min (760 MPA min) Elongation: 15% < 0.15” 18% > 0.15”
Tempered 3/4 Hard
Ultimate Tensile Strength: 175 KSI min (1205 MPA min)
Yield Strength (0.2% Offset): 135 KSI min (930 MPA min)
Elongation: 10% < 0.15” 12% > 0.15”
Tempered Full Hard
Ultimate Tensile Strength: 185 KSI min (1275 MPA min)
Yield Strength (0.2% Offset): 140 KSI min (965 MPA min)
Elongation: 8% < 0.15” 9% > 0.15”

Finishes - Wire
XC - Extra Clean Bright Annealed or Bright Annealed and Cold Rolled Grease - Ultra bright finish (for decorative applications)
Soap - Soap coating on tempered wire to act as lubricant
Contact haosteel Wire with special wire finishes.

Cold Forming
201 is considered a formable stainless and is often drawn, stamped and headed. It work hardens easily and should be followed by anneal.

Heat Treatment
201 cannot be heat treated for hardness. Hardness can only be achieved by cold working.