304 Stainless Steel Pipes and Tubes

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304 Stainless Steel Pipes & Tubes Specification

Himesh Steel supplies welded austenitic, duplex and nickel alloy welded stainless steel pipes in accordance with:

  • ASTM A312
  • ASTM A358 Class 1, 2, 3, 4, 5
  • ASTM A790
  • ASTM A928 Class 1, 2, 3, 4, 5
  • API5LC
  • ASTM B775
  • EN10217-7 TC 1/2
  • Customer specification

 Composition ranges for 304 grade stainless steel

Grade
C
Mn
Si
P
S
Cr
Mo
Ni
N
304
min.
18.0
8.0
max.
0.08
2.0
0.75
0.045
0.030
20.0
10.5
0.10
304L
min.
18.0
8.0
max.
0.030
2.0
0.75
0.045
0.030
20.0
12.0
0.10
304H
min.
0.04
18.0
8.0
max.
0.10
2.0
0.75
0.045
0.030
20.0
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 50mm) 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 (m/m/0C)
Thermal Conductivity (W/m.K)
Specific Heat 0-1000C (J/kg.K)
Electrical Resistivity (n.m)
0-1000C
0-3150C
0-5380C
at 1000C
at 5000C
304/L/H
8000
193
17.2
17.8
18.4
16.2
21.5
500
720

 

304 Stainless Steel Pipes and Tubes Grade Specification Comparison

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

Table 4. Grade specifications for 304 grade stainless 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
These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.
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