SS304 Stainless Steel Pipe

SS304 Stainless Steel Pipe

SS 304 Stainless Steel Pipe Composition Typical compositional ranges for grade 304 stainless steels are given in table 1. Table 1. Composition ranges for 304 grade stainless steel Mechanical Properties Typical mechanical properties for grade 304 stainless steels are given in table 2. Table 2....

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SS 304 Stainless Steel Pipe

Composition
Typical compositional ranges for grade  304 stainless steels are given in table 1.

Table 1. Composition ranges for 304 grade  stainless steel

Grade

C

Mn

Si

P

S

Cr

Mo

Ni

N

304

min.

max.

-

0.08

-

2.0

-

0.75

-

0.045

-

0.030

18.0

20.0

-

8.0

10.5

-

0.10

304L

min.

max.

-

0.030

-

2.0

-

0.75

-

0.045

-

0.030

18.0

20.0

-

8.0

12.0

-

0.10

304H

min.

max.

0.04

0.10

-

2.0

-

0.75

-

0.045

-

0.030

18.0

20.0

-

8.0

10.5

-


Mechanical Properties

Typical mechanical properties for grade  304 stainless steels are given in table 2.

Table 2. Mechanical properties of 304 grade  stainless steel

Grade

Tensile Strength    (MPa) min

Yield Strength    0.2% Proof (MPa) min

Elongation (% in 50 mm) min

Hardness

Rockwell B (HR B) max

Brinell (HB) max

304

515

205

40

92

201

304L

485

170

40

92

201

304H

515

205

40

92

201


304H also has a requirement for a grain  size of ASTM No 7 or coarser.

Physical Properties
Typical physical properties for annealed  grade 304 stainless steels are given in table 3.

Table 3. Physical properties of 304 grade  stainless steel in the annealed condition

Grade

Density (kg/m3)

Elastic Modulus

(GPa)

Mean Coefficient    of Thermal Expansion (μm/m/°C)

Thermal    Conductivity (W/m.K)

Specific Heat 0-

100

°C (J/kg.K)

Electrical    Resistivity (nΩ.m)

0-100 °C

0-315 °C

0-538 °C

at 100 °C

at 500 °C

304/L/H

8000

193

17.2

17.8

18.4

16.2

21.5

500

720


Grade Specification Comparison
Approximate grade comparisons for 304  stainless steels are given in table 4.

Table 4. Grade specifications for 304 gradestainless steel

Grade

UNS No

Old British

Euronorm

Swedish SS

Japanese JIS

BS

En

No

Name

304

S30400

304S31

58E

1.4301

X5CrNi18-10

2332

SUS 304

304L

S30403

304S11

-

1.4306

X2CrNi19-11

2352

SUS 304L

304H

S30409

304S51

-

1.4948

X6CrNi18-11

-

-




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