ISO SGS 430 2b Stainless Steel Coil Austenitic Chromium Nickel Stainless St

PRODUCT DESCRIPTION
430 stainless steel strip

Type 304 Stainless Steelis the most widely used of the austenitic
(chromium/nickel) stainless steels. In the annealed condition it is essentially
non-magnetic and becomes slightly magnetic with the application of cold work.
Product Features
Type 201 Stainless Steelis an austenitic chromium-nickel-manganese stainless
steel which was developed to conserve nickel. Type 201 is a lower cost
alternative to conventional Cr-Ni stainless steels such as 301 and 304. Nickel
is replaced by additions of manganese and nitrogen. It is non-hardenable by
thermal treatment, but may be cold worked to high tensile strengths. Type 201
is essentially nonmagnetic in the annealed condition and becomes magnetic when
cold worked. Type 201 can be substituted for Type 301 in many applications.


Specifications

ASTM A240, A666


Typical Applications

Typical applications for Types 201 are cookware, hose clamps, piston rings,
transit car structural member, transit car roofing/siding, thermal window
spacers, air bag containers, and truck trailer posts and door frames.



Chemical Composition

Element

Type 201

Carbon

0.15x

Manganese

5.5 - 7.5

Sulfur

0.03X

Phosphorus

0.060x

Silicon

1.0 x

Chromium

16 - 18

Nickel

0.6-5.5

Nitrogen

0.25x


Mechanical Properties

Type

Yield Strength 0.2% offset (KSI)

Tensile Strength (KSI)

% Elongation(2" Gauge length)

Hardness Rockwell

201 Ann

38 min.

75 min.

40% min.

HRB 95 max.

201 ¼ Hard

75 min.

125 min.

25.0 min.

25 – 32 HRC (typical)

201 ½ Hard

110 min.

150 min.

18.0 min.

32 - 37 HRC (typical)

201 ¾ Hard

135 min.

175 min.

12.0 min.

37 – 41 HRC (typical)

201 Full Hard

145 min.

185 min.

9.0 min.

41 – 46 HRC (typical)


Physical Properties

Density (lb./ in^2) @ RT


0.283

Modulus of Elasticity in Tension (psi x 10^6)


28.6

Specific Heat (BTU/°F/lb.)

32 to 212 °F

0.12

Thermal Conductivity (BTU/hr/ft^2/ft)

212°F

9.4

M , ean Coefficient of Thermal Expansion (in. x 10^-6 per °F)

32 to 212°F

8.7


32 to 600°F

9.7


32 to 1,000°F

10.2

Electrical Resistivity (micro ohms - cm)

at 70°F

69

Melting Point Range (°F)


2550/2650

Oxidation Resistance - Continuous Service(°F)


1550

Oxidation Resistance - Intermittent Service(°F)


1500


Processing

The annealing temperature for Type 201 is between 1850-2000°F. Rapid cooling
through the carbide precipitation range (1500 – 800 °F) is necessary to keep
the carbides in solution and prevent sensitization. Type 201 is not hardenable
by thermal treatment; it is only hardenable by cold working.


Forming

Type 201 has similar bending, forming and drawing characteristics to Type 301
stainless steel


Welding

Type 201 can be welded by all conventional methods applied to 18 percent
chromium, 8 percent nickel steels. Filler metal of the conventional chromium-
nickel analyses can be used. Like other austenitic stainless steels where
carbon is not controlled below 0.03%, Type 201 is susceptible to intergranular
corrosion in the weld heat affected zone.


Corrosion

Type 201 is resistant to a wide variety of mild to moderately corrosive
environments. It has corrosion resistance approaching that of Types 301and has
been successfully substituted for 304 in many mild environments.

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