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Stainless Steel · Tubes · ASTM A213 TP310S

SS 310S Stainless Steel Tubes

In short: SS 310S tube to ASTM A213 or A249 is used for furnace radiant tubes, heat-recovery coils and thermocouple protection where tubes run hot in oxidising atmospheres.

S31008
UNS number
7.9
density, g/cm³
3.1 / 3.2
EN 10204 certificates
4
SS 310S product forms
Quote SS 310S tubes →Sizes and weights
SS 310S tube weightCalculated at 7.9 g/cm³: 6.4×0.89 0.12 kg/m; 9.5×1.24 0.26 kg/m; 12.7×1.24 0.35 kg/m; 12.7×1.65 0.45 kg/m; 15.9×1.24 0.45 kg/m; 19.1×1.65 0.71 kg/m; 19.1×2.11 0.89 kg/m; 25.4×1.65 0.97 kg/m; 25.4×2.11 1.22 kg/m; 31.8×1.65 1.23 kg/m; 38.1×1.65 1.49 kg/m; 38.1×2.11 1.88 kg/m. SS 310S tube weight7.9 g/cm³ 6.4×0.89: 0.12 kg/m6.4×0.899.5×1.24: 0.26 kg/m9.5×1.2412.7×1.24: 0.35 kg/m12.7×1.2412.7×1.65: 0.45 kg/m12.7×1.6515.9×1.24: 0.45 kg/m15.9×1.2419.1×1.65: 0.71 kg/m19.1×1.6519.1×2.11: 0.89 kg/m19.1×2.1125.4×1.65: 0.97 kg/m25.4×1.6525.4×2.11: 1.22 kg/m25.4×2.1131.8×1.65: 1.23 kg/m31.8×1.6538.1×1.65: 1.49 kg/m38.1×1.6538.1×2.11: 1.88 kg/m38.1×2.11 1.9 OD × wall, mm · kg/m
Calculated values for estimating; actual weights vary within tolerances.

Why this combination

Why SS 310S in tubes

Low carbon for weldabilityTop oxidation resistance among standard stainless gradesSigma-phase risk in long service at 650–900 °CStable austenite, tough at low temperatures

Thin tube walls lose metal to scaling quickly; SS 310S's chromium and nickel slow that, extending tube life in hot air and flue gas.

Where tubes cycle between hot and cold, scale adhesion matters as much as oxidation rate; 253 MA is an alternative worth comparing.

Specification

How to specify SS 310S tubes

OD 3 mm to about 127 mm (¼" to 5") typical, wall 0.5 mm to 12 mm; BWG or mm; straight lengths up to about 30 m, U-bent to drawing

SS 310S tubes ASTM A213 TP310S
SS 310S tubes: ASTM A213 TP310S (seamless)
Specification
ASTM A213 TP310S (seamless); A249 / A269 TP310S (welded)
UNS
S31008
EN / W.Nr.
1.4845
Order by
OD × wall, length

Sizes and weights

SS 310S tubes sizes, weighed at 7.9 g/cm³

Other sizes on request. For general tubes information, such as manufacturing routes and end finishes, see the tubes guide.

SS 310S tube weights at 7.9 g/cm³
OD mmWall mmkg/m
6.350.890.121
9.531.240.255
12.701.240.353
12.701.650.453
15.881.240.451
19.051.650.713
19.052.110.887
25.401.650.973
25.402.111.220
31.751.651.233
38.101.651.493
38.102.111.885
50.802.112.550
50.802.773.302

Chemistry

SS 310S composition

UNS
S31008
EN / W.Nr.
1.4845 · X8CrNi25-21
Density
7.9 g/cm³
SS 310S Stainless Steel chemical composition, % (ASTM A240)
ElementLimit, %Why it matters
C0.08 max
Mn2.00 max
P0.045 max
S0.030 max
Si1.50 max
Cr24.0 – 26.0
Ni19.0 – 22.0

Limits per ASTM A240; other product forms and specifications differ slightly. Your order's specification and edition govern.

0%5%10%15%20%25%30% Mn Si Cr Ni
Main alloying elements of SS 310S Stainless Steel: bars show the permitted range (ASTM A240).

Questions

About SS 310S tubes

Is SS 310S tube used in heat exchangers?

Yes, mainly in high-temperature gas-to-gas exchangers and recuperators.

Can SS 310S tube be bent?

Yes, it forms well in the annealed condition.

From enquiry to dispatch

How a SS 310S tubes order runs

  1. 01 EnquiryGrade, specification, size, quantity
  2. 02 ReviewChecked against your standard
  3. 03 InspectPMI, dimensions, TPI if required
  4. 04 CertifyEN 10204 3.1 / 3.2, heat traceable
  5. 05 ShipPacked and documented for the destination

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