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Stainless Steel · Pipes · ASTM A312 / ASME SA312 TP310S

SS 310S Stainless Steel Pipes

In short: SS 310S pipe to ASTM A312 TP310S is a 25% chromium, 20% nickel heat-resisting stainless pipe for furnace, kiln and hot-gas lines where oxidation, not corrosion, is the main threat.

S31008
UNS number
7.9
density, g/cm³
3.1 / 3.2
EN 10204 certificates
4
SS 310S product forms
Quote SS 310S pipes →Sizes and weights
SS 310S pipe weight by sizeCalculated at 7.9 g/cm³: ½" 1.28 kg/m; ¾" 1.70 kg/m; 1" 2.52 kg/m; 1¼" 3.41 kg/m; 1½" 4.07 kg/m; 2" 5.48 kg/m; 2½" 8.69 kg/m; 3" 11.36 kg/m; 4" 16.18 kg/m; 6" 28.44 kg/m; 8" 42.82 kg/m; 10" 60.69 kg/m; 12" 74.34 kg/m. SS 310S pipe weight by size7.9 g/cm³ ½": 1.28 kg/m½"¾": 1.70 kg/m¾"1": 2.52 kg/m1"1¼": 3.41 kg/m1¼"1½": 4.07 kg/m1½"2": 5.48 kg/m2"2½": 8.69 kg/m2½"3": 11.36 kg/m3"4": 16.18 kg/m4"6": 28.44 kg/m6"8": 42.82 kg/m8"10": 60.69 kg/m10"12": 74.34 kg/m12" 74.3 NPS, Sch 40S · kg/m
Calculated values for estimating; actual weights vary within tolerances.

Why this combination

Why SS 310S pipe goes where the heat is

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

High chromium and nickel give SS 310S strong oxidation resistance in air, so it is used for furnace ducts, burner pipework, radiant tubes and hot process-gas lines. The S version keeps carbon low for welding.

It is not a creep-strength grade for high-pressure service and it is less suited to sulphur-bearing reducing gases. For pressure parts in the creep range, 310H or alloy 800H are specified.

Specification

How to specify SS 310S pipes

NPS ⅛" to 48" and larger (DN 6 – DN 1200+), schedules 5S to XXS, single random, double random and cut lengths

SS 310S pipe cross-section, NPS 6 Sch 40S Engineering drawing showing outside diameter 168.28 mm and wall thickness 7.11 mm (ASTM A312 TP310S). Wall thickness is exaggerated for clarity. OD 168.28 mm WT 7.11 mm NPS 6SCH 40S ASTM A312 TP310S
SS 310S pipes: ASTM A312 / ASME SA312 TP310S (seamless & welded)
Specification
ASTM A312 / ASME SA312 TP310S (seamless & welded); A358 EFW
UNS
S31008
EN / W.Nr.
1.4845
Grade marking
TP310S
Dimensions
ASME B36.19M

Sizes and weights

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

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

SS 310S pipe: wall (mm) / weight (kg/m) at 7.9 g/cm³, ASME B36.19M
NPSOD mmSch 5SSch 10SSch 40SSch 80S
½"21.341.65 / 0.812.11 / 1.012.77 / 1.283.73 / 1.63
¾"26.671.65 / 1.022.11 / 1.292.87 / 1.703.91 / 2.21
1"33.401.65 / 1.302.77 / 2.113.38 / 2.524.55 / 3.26
1¼"42.161.65 / 1.662.77 / 2.713.56 / 3.414.85 / 4.49
1½"48.261.65 / 1.912.77 / 3.133.68 / 4.075.08 / 5.44
2"60.331.65 / 2.402.77 / 3.963.91 / 5.485.54 / 7.53
2½"73.032.11 / 3.713.05 / 5.305.16 / 8.697.01 / 11.49
3"88.902.11 / 4.543.05 / 6.505.49 / 11.367.62 / 15.37
4"114.302.11 / 5.883.05 / 8.426.02 / 16.188.56 / 22.46
6"168.282.77 / 11.383.40 / 13.917.11 / 28.4410.97 / 42.83
8"219.082.77 / 14.873.76 / 20.098.18 / 42.8212.70 / 65.05
10"273.053.40 / 22.754.19 / 27.969.27 / 60.6912.70 / 82.06
12"323.853.96 / 31.444.57 / 36.219.53 / 74.3412.70 / 98.07

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 pipes

What temperature can SS 310S pipe take?

It resists oxidation in air to high temperatures, commonly quoted around 1,000–1,100 °C for continuous service; actual limits depend on atmosphere and load.

SS 310S or SS 309S pipe?

SS 310S has more nickel and chromium for higher temperatures; SS 309S is a lower-cost option for moderate heat.

From enquiry to dispatch

How a SS 310S pipes 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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