ASTM A213 Stainless Steel Tubing Specification

ASTM A213 standard is a common used specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Super heater, and Heat-Exchanger Tubes, offering manufacture and purchasing requirements for manufactures and users, main information contain grade, size, finishes, test and other terms, the equivalent standard is ASME SA213.

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ASTM A213 Ferritic and Austenitic AlloySteel Material Grades

ASTM A213 Specification covers material containing alloy steels, Ferritic and Austenitic steels, Austenitic stainless steel is the most used group due to their properties, common designated grades are listed, in table 1 for chemical composition, table 2 for mechanical properties and solution temperature.

ASTM A213 specification contains many grades, alloy grades are mainly T5, T9, T11, T12, T22, T91, stainless grades are TP304/304L, TP316/316L, for more grades and compositions, click A213 alloy tubing grades and stainless steel grades.

Table 1, chemical composition %

Grade C Si Mn Cr Ni Mo S P
TP304 0,08 1,0 2 18 – 20 8 – 11 0,03 0,045
TP304L 0,035 1,0 2 18 – 20 8 – 12 0,03 0,045
TP316 0,08 1,0 2 16 – 18 11 – 14 2 – 3 0,03 0,045
TP316L 0,035 1,0 2 16 – 18 10 – 14 2 – 3 0,03 0,045
TP321 0,08 1,0 2 17 – 19 9 – 12 0,03 0,045

Table 2, mechanical properties and solution temperature (Min, degree centigrade).

GradeTensile strength(Mpa)Yield point(Mpa)Elongation(%)Hardness(HRB)Solution temperature
TP30451520535901040
TP304L48517035901040
TP31651520535901040
TP316L48517035901040
TP32151520535901040

ASTM A213 Seamless Tube Sizes And Dimensions

The tubing sizes and thicknesses usually furnished to this specification are 1/8 inch [3.2 mm] in inside diameter to 5 inch [127 mm] in outside diameter and 0.015 to 0.500 in. [0.4 to 12.7 mm].

Custom outside diameter and wall thickness are listed as below, tubing having other diameters may be furnished, provided such tubes comply with all other requirements of this specification。

Outside diameter15.8, 16.0, 19.05, 22, 25, 28, 38.1, 57, 60.3, 76.2, 88.9 mm
Wall thickness1.24, 1.65, 2.5, 2.77, 3.02 mm

ASTM A213 Tolerances, Outside Diameter, Wall Thickless and Length

OD, mmW.T, mmL, mm
≤25.4±0.10+20%, 0% OD>50, T>5.6, AVG wall +/-10%OD<50.8,+3mm
OD>=50.8, +5mm
25.4~38.1±0.15
38.1~50.8±0.2
50.8~63.5±0.25
63.5~76.2±0.3
76.2~101.6±0.38

ASTM A213 Wall Thickness Tolerances

ASTM A213 specifies Minimum wall thickness, namely, there is no mill undertolerance, only overtolerance, unless specified as average wall thickness is requied conforming to ASTM A1016/A1016M.

Seamless tubing furnished to this specification shall conform to the requirements of Specification ASTM A1016/A1016M, including any supplementary requirements。

Seamless Tube Manufacturing Processes

  • The tubes shall be made by the seamless process and shall be either hot finished or cold finished, as specified.
  • Heat treatment shall be done separately and in addition to heating for hot forming.
  • The ferritic alloy and ferritic stainless steels shall be reheated. austenitic stainless steel tubes shall be furnished in the heat-treated condition.
  • Tubes may be individually quenched in water or rapidly cooled by other means.
  • Tubes shall be pickled free of scale. When bright annealing is used, pickling is not necessary.
  • Complete tests should be conducted conforming to ASTM A213 or ASTM A1016.

ASTM A213 Testing Requirement

Each tube shall be subjected to the nondestructive electric test or hydrostatic test, Manufacturer Material Test Certification as per EN 10204 3。1 should be provided。

  • Tensile property, Elogation
  • Hardness testing, Brinell, Rockwell, Vickers hardness
  • Flattening testing
  • Flaring testing
  • Hydrostatic or Nondestructive test
  • Intergranular Corrosion Test – ASTM A262/E (option)

ASTM A213 Seamless Tube Manufacturer

We are professional ASTM A213 seamless tube manufacture & supplier, having capability to produce wide range size seamless tube for heat exchanger system, manufacturing process starts from extrusion of billet, by cold rolling and cold drawn methods to control size and tolerance, heat treatment will be finished after cold working to achieve original steel properties, which improve high temperature resistance and corrosion resistance, then tubes should be under pickling passivation condition.

ASTM A213 VS ASTM A269

  • ASTM A213 pertains to seamless tubes, ASTM A269 can be both seamless and welded tubing.
  • ASTM A213 material contain Ferritic and Austenitic Alloy Steel, ASTM A269 only has Austenitic Stainless Steel.
  • Dimensional tolerances on outside diameter and wall thickness are not the same.
  • ASTM A213 used in heat exchanger system, ASTM A269 is for general service use, commonly instrumentation tubing.
  • ASTM A213 has ASME version SA213 for alternative, however, there are is no ASME SA269.
  • In practise, ASTM A213 and ASTM A269 can be dual certified standard.

Reading more about ASTM A269 Specification

A213 Alloy Tubing Grades And Stainless Steel Grades

Chemical Composition for Low Alloy Steel
GradeUNS DesignationComposition, % Max
CarbonManganesePhosphorusSulfurSiliconNickelChromiumMolybdenumVanadiumBoronNiobiumNitrogenAluminumTungstenOther Elements
T2K115470.10–0.200.30–0.610.025 0.025B0.10–0.300.50–0.810.44–0.65
T5K415450.150.30–0.600.0250.0250.504.00–6.000.45–0.65
T5bK515450.150.30–0.600.0250.0251.00–2.004.00–6.000.45–0.65
T5cK412450.120.30–0.600.0250.0250.504.00–6.000.45–0.65Ti 4xC–0.70
T9K909410.150.30–0.600.0250.0250.25–1.008.00–10.000.90–1.10
T11K115970.05–0.150.30–0.600.0250.0250.50–1.001.00–1.500.44–0.65
T12K115620.05–0.150.30–0.610.025 0.025B0.500.80–1.250.44–0.65
T17K120470.15–0.250.30–0.610.0250.0250.15–0.350.80–1.250.15
T21K315450.05–0.150.30–0.600.0250.0250.50–1.002.65–3.350.80–1.06
T22K215900.05–0.150.30–0.600.0250.0250.501.90–2.600.87–1.13
T23K407120.04–0.100.10–0.600.0300.0100.500.401.90–2.600.05–0.300.20–0.300.0010– 0.0060.02–0.080.0150.0301.45–1.75Ti 0.005–0.060
Ti/N 3.5C
T24K307360.05–0.100.30–0.700.0200.0100.15–0.452.20–2.600.90–1.100.20–0.300.0015– 0.0070.0120.02Ti 0.06–0.10
T36K210010.10–0.170.80–1.200.0300.0250.25–0.501.00–1.300.300.25–0.500.020.015–0.0450.020.050Cu 0.50–0.80
T91K909010.07–0.140.30–0.600.0200.0100.20–0.500.408.0–9.50.85–1.050.18–0.250.06–0.100.030– 0.0700.02Ti 0.01 Zr 0.01
T92K924600.07–0.130.30–0.600.0200.0100.500.408.5–9.50.30–0.600.15–0.250.001– 0.0060.04–0.090.030– 0.0700.021.5–2.00Ti 0.01 Zr 0.01
T122K912710.07–0.140.700.0200.0100.500.5010.0–11.50.25–0.600.15–0.300.0005– 0.0050.04–0.100.040– 0.1000.021.50–2.50Cu 0.30–1.70
Ti 0.01 Zr 0.01
T911K910610.09–0.130.30–0.600.0200.0100.10–0.500.408.5–9.50.90–1.100.18–0.250.0003– 0.0060.06–0.100.040– 0.0900.020.90–1.10Ti 0.01 Zr 0.01
Chemical Composition for Austenitic and Ferritic Stainless Steel
GradeUNS DesignationComposition %, Max
CarbonManganesePhosphorusSulfurSiliconChromiumNickelMolybdenumNitrogenNiobiumTitaniumOther Elements
TP201S201000.155.5–7.50.0600.0301.0016.0–18.03.5–5.50.25
TP202S202000.157.5–10.00.0600.0301.0017.0–19.04.0–6.0.025
XM-19S209100.064.0–6.00.0450.0301.0020.5–23.511.5–13.51.50–3.000.20–0.400.10–0.30V 0.10–0.30
CS215000.06–0.155.5–7.00.0450.0300.20–1.0014.0–16.09.0–11.00.80–1.200.75–1.25B 0.003– 0.009
V 0.15–0.40
CS257000.022.000.0250.0106.5–8.08.0–11.522.0–25.00.50
TP304S304000.082.000.0450.0301.0018.0–20.08.0–11.0
TP304LS304030.035D2.000.0450.0301.0018.0–20.08.0–12.0
TP304HS304090.04–0.102.000.0450.0301.0018.0–20.08.0–11.0
CS304320.07–0.131.000.0400.0100.3017.0–19.07.5–10.50.05–0.120.30–0.60Al 0.003– 0.030
B 0.001– 0.010
Cu 2.5–3.5
CS304340.07–0.142.000.0400.0101.0017.5–19.59.0–12.00.10–0.40E0.10–0.25EB 0.001– 0.004
Cu 2.50– 3.50
TP304NS304510.082.000.0450.0301.0018.0–20.08.0–11.00.10–0.16
TP304LNS304530.035D2.000.0450.0301.0018.0–20.08.0–11.00.10–0.16
CS306150.016–0.242.000.0300.0303.2–4.017.0–19.513.5–16.0Al 0.8–1.5
CS308150.05–0.100.800.0400.0301.40–2.0020.0–22.010.0–12.00.14–0.20Ce 0.03–0.08
TP309SS309080.082.000.0450.0301.0022.0–24.012.0–15.0
TP309HS309090.04–0.102.000.0450.0301.0022.0–24.012.0–15.0
TP309LMoNS309250.0252.000.0400.0300.7023.0–26.013.0–16.00.5–1.20.25–0.40
TP309CbS309400.082.000.0450.0301.0022.0–24.012.0–16.010xC–1.10
TP309HCbS309410.04–0.102.000.0450.0301.0022.0–24.012.0–16.010xC-1.10
S309420.03–0.102.000.0400.0301.0021.0–23.014.5–16.50.10–0.200.50–0.80B=0.001–0.005
CS310020.022.000.0200.0150.1524.0–26.019.0–22.00.100.10
TP310SS310080.082.000.0450.0301.0024.0–26.019.0–22.0
TP310HS310090.04–0.102.000.0450.0301.0024.0–26.019.0–22.0
TP310MoCbNS310250.101.500.0300.0301.0019.5–23.023.0–26.01.0–2.00.10–0.250.10–0.400.20B 0.002– 0.010
S310350.04–0.100.600.0300.0150.4021.5–23.523.5–26.50.15–0.300.30–0.60W 2.0–4.0
Co 1.0–2.0
Cu 2.0–3.5
B 0.002– 0.008
TP310CbS310400.082.000.0450.0301.0024.0–26.019.0–22.010xC-1.10
TP310HCbS310410.04–0.102.000.0450.0301.0024.0–26.019.0–22.010xC-1.10
TP310HCbNS310420.04–0.102.000.0450.0301.0024.0–26.019.0–22.00.15–0.350.20–0.60
TP310MoLNS310500.0252.000.0200.0300.4024.0–26.021.0–23.02.00–3.000.10–0.16
CS310600.05–0.101.000.0400.0300.5022.0–24.010.0–12.50.18–0.25Ce + La 0.025–0.070
B 0.001–0.010
CS312540.0201.000.0300.0100.8019.5–20.517.5–18.56.0–6.50.18–0.22Cu 0.50–1.00
CS312720.08–0.121.50–2.000.0300.0150.30–0.7014.0–16.014.0–16.01.00–1.400.30–0.60B 0.004– 0.008
CS312770.0203.000.0300.0100.5020.5–23.026.0–28.06.5–8.00.30–0.40Cu 0.50–1.50
TP316S316000.082.000.0450.0301.0016.0–18.010.0–14.02.00–3.00
TP316LS316030.035D2.000.0450.0301.0016.0–18.010.0–14.02.00–3.00
TP316HS316090.04–0.102.000.0450.0301.0016.0–18.011.0–14.02.00–3.00
TP316TiS316350.082.000.0450.0300.7516.0–18.010.0–14.02.00–3.000.105X (C + N)– 0.70
TP316NS316510.082.000.0450.0301.0016.0–18.010.0–13.02.00–3.000.10–0.16
TP316LNS316530.035D2.000.0450.0301.0016.0–18.010.0–13.02.00–3.000.10–0.16
TP317S317000.082.000.0450.0301.0018.0–20.011.0–15.03.0–4.0
TP317LS317030.0352.000.0450.0301.0018.0–20.011.0–15.03.0–4.0
TP317LMS317250.032.000.0450.0301.0018.0–20.013.5–17.54.0–5.00.20Cu 0.75
TP317LMNS317260.032.000.0450.0301.0017.0–20.013.5–17.54.0–5.00.10–0.20Cu 0.75
CS320500.0301.500.0350.0201.0022.0–24.020.0–23.06.0–6.80.21–0.32Cu 0.40
TP321S321000.082.000.0450.0301.0017.0–19.09.0–12.05(C + N)– 0.70
TP321HS321090.04–0.102.000.0450.0301.0017.0–19.09.0–12.04(C + N)– 0.70
CS326150.072.000.0450.0304.8–6.016.5–19.519.0–22.00.30–1.50Cu 1.50– 2.50
CS332280.04–0.081.000.0200.0150.3026.0–28.031.0–33.00.60–1.00Ce 0.05– 0.10, Al 0.025
CS345650.0305.0–7.00.0300.0101.0023.0–25.016.0–18.04.0–5.00.40–0.600.10
TP347S347000.082.000.0450.0301.0017.0–20.09.0–13.010xC–1.10
TP347WS347050.052.000.0400.0301.0017.0–20.08.00–11.00.10–0.250.25–0.50V 0.20–0.50 W 1.50–2.60
TP347HS347090.04–0.102.000.0450.0301.0017.0–19.09.0–13.08xC–1.10
TP347HFGS347100.06–0.102.000.0450.0301.0017.0–19.09.0–13.08xC–1.10
TP347LNS347510.005–0.0202.000.0450.0301.0017.0–19.09.0–13.00.06–0.100.20–0.50F
TP348S348000.082.000.0450.0301.0017.0–19.09.0–13.0GCo 0.20, Ta 0.10
TP348HS348090.04–0.102.000.0450.0301.0017.0–19.09.0–13.0HCo 0.20, Ta 0.10
S350450.06–0.101.500.0450.0151.0025.0–29.032.0–37.00.15–0.60Al 0.15–0.60 Cu 0.75
XM-15S381000.082.000.0300.0301.50–2.5017.0–19.017.5–18.5
S388150.0302.000.0400.0205.5–6.513.0–15.015.0–17.00.75–1.50Cu 0.75–1.50 Al 0.30
Alloy 20N080200.0702.000.0450.0351.0019.0-21.032.0-38.02.00-3.00MCu 3.00-4.00
CN083670.0302.000.0400.0301.0020.0-22.023.5-25.56.00-7.000.18-0.25Cu 0.75
800N088000.101.500.0450.0151.0019.0–23.030.0–35.0Cu 0.75
Al 0.15–0.60
Ti 0.15–0.60
FeI 39.5 min
800HN088100.05–0.101.500.0450.0151.0019.0–23.030.0–35.0Cu 0.75
Al 0.15–0.60
Ti 0.15–0.60
FeI 39.5 min
N088110.06–0.101.500.0450.0151.0019.0–23.030.0–35.0Cu 0.75
Al 0.15–0.60J
Ti 0.15–0.60J
FeI 39.5 min
N089040.0202.000.0400.0301.0019.0–23.023.0–28.04.0–5.00.10Cu 1.00–2.00
N089250.0201.000.0450.0300.5019.0–21.024.0–26.06.0–7.00.10–0.20Cu 0.80–1.50
N089260.0202.000.0300.0100.5019.0–21.024.0–26.06.0–7.00.15–0.25Cu 0.50–1.50
TP444S444000.031.000.0400.0301.0017.5–19.5K1.75–2.500.035L

C: For these alloys, there is no common grade designation。 The UNS number uniquely identifies these alloys。