Comparision of ASME SA199 and ASME SA213

2025-04-15Leave a message

What are ASME SA199 and ASME SA213 standards?

ASME SA199—Seamless Cold-Drawn Intermediate Alloy-Steel Heat-Exchanger and Condenser Tube

ASME SA213—Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tube

The American Society of Mechanical Engineers (ASME) has adopted ASME SA199 and ASME SA213 as seamless steel pipe material standards for boilers, pressure vessels, and pipelines, which are based on the comparable ASTM standards. According to ASTM Association regulations, the SA199 standard was repealed in 1995 and replaced by SA200, which was then abolished in 1999 and replaced by SA213.

Applicable Range:

ASME SA199: Heat exchanger tubes and condenser tubes
ASME SA213: Boiler tubes, superheater and heat exchanger tubes

Applicable Material:

ASME SA199: Chromium-molybdenum and chromium-molybdenum-silicon alloy steel
ASME SA213: Low alloy steels, austenitic and ferritic stainless steels

Applicable Dimensions:

Both standards define minimum wall thickness, while SA213 may also apply to average wall thickness (at the purchasers request).

ASME SA199: OD 1/8”-3” [3.2-76.2mm]; Mini Thk >0.015” [0.4mm]
ASME SA213: ID 1/8” -OD 5” [ID 3.2-OD 127mm]; Mini Thk 0.015”-0.500” [0.4-12.7mm]

Processing Methods:

Both standards require that the tubes be created in a seamless process, although their forming methods differ.

ASME SA199: Cold drawn
ASME SA213: Hot finished & Cold finished

Applicable Standards for General Requirements

ASME SA199: A1016/A1016M
ASME SA213: A450/A450M

The comparison of the aforesaid factors reveals that ASME SA213 has a broader applicability scope than ASME SA199.

Comparison of Material Grades

According to the provisions of the two standards, the grades in ASME SA199 are essentially contained in the rules of ASME SA213, but the latter specifies more diversified material grades. Below, we compare the two popular classes based on chemical composition and mechanical qualities.

Similar grades include T5, T9, T11, T21, T22, and T91.

1.Chemical Composition

Grade	T5		T9		T11		T21		T22		T91
Grade	SA199	SA213	SA199	SA213	SA199	SA213	SA199	SA213	SA199	SA213	SA199	SA213
C	≤0.15	≤0.15	≤0.15	≤0.15	0.05-0.15	0.05-0.15	0.05-0.15	0.05-0.15	0.05-0.15	0.05-0.15	0.08-0.12	0.07-0.14
Mn	0.30-0.60	0.30-0.60	0.30-0.60	0.30-0.60	0.30-0.60	0.30-0.60	0.30-0.60	0.30-0.60	0.30-0.60	0.30-0.60	0.30-0.60	0.30-0.60
P	≤0.025	≤0.025	≤0.025	≤0.025	≤0.025	≤0.025	≤0.025	≤0.025	≤0.025	≤0.025	≤0.020	≤0.020
S	≤0.025	≤0.025	≤0.025	≤0.025	≤0.025	≤0.025	≤0.025	≤0.025	≤0.025	≤0.025	≤0.010	≤0.010
Si	≤0.50	≤0.50	0.25-1.00	0.25-1.00	0.50-1.00	0.50-1.00	≤0.50	0.50-1.00	≤0.50	≤0.50	0.20-0.50	0.20-0.50
Cr	4.00-6.00	4.00-6.00	8.00-10.00	8.00-10.00	1.00-1.50	1.00-1.50	2.65-3.35	2.65-3.35	1.90-2.60	1.90-2.60	8.00-9.50	8.50-9.50
Mo	0.45-0.65	0.45-0.65	0.90-1.10	0.90-1.10	0.44-0.65	0.44-0.65	0.80-1.06	0.80-1.06	0.87-1.13	0.87-1.13	0.85-1.05	0.85-1.05
Ni	-	-	-	-	-	-	-	-	-	-	≤0.40	≤0.40
V	-	-	-	-	-	-	-	-	-	-	0.18-0.25	0.18-0.25
Cb	-	-	-	-	-	-	-	-	-	-	0.06-0.10	-
Nb	-	-	-	-	-	-	-	-	-	-	-	0.06-0.10
N	-	-	-	-	-	-	-	-	-	-	0.03-0.07	0.03-0.07
Al	-	-	-	-	-	-	-	-	-	-	≤0.04	≤0.02
Ti	-	-	-	-	-	-	-	-	-	-	-	≤0.01
Zr	-	-	-	-	-	-	-	-	-	-	-	≤0.01

Grades T5, T9, T11, and T22 have identical chemical compositions under these two standards, however T21 and T91 diverge in the composition of specific components.

2.Mechanical Properties

Grade

T11

T21

T22

T91

SA199

SA213

SA199

SA213

SA199

SA213

SA199

SA213

SA199

SA213

SA199

SA213

Tensile Strength, ksi [MPa]

≥60 [415]

≥85 [585]

Yield Strength, ksi [MPa]

≥25 [170]

≥30 [205]

≥25 [170]

≥30 [205]

≥25 [170]

≥30 [205]

≥25 [170]

≥30 [205]

≥25 [170]

≥30 [205]

≥60 [415]

Elongation, %

≥30

≥20

Hardness

≤85 HRB

≤163 HB

≤170HV

≤85 HRB

≤89 HRB

≤179 HBW

≤190HV

≤89 HRB

≤85 HRB

≤163 HB

≤170HV

≤85 HRB

≤163 HB

≤170HV

≤85 HRB

≤163 HB

≤170HV

≤85 HRB

≤98 HRB

190-250 HBW

196-265 HV

90 HRB-25 HRC

3.Heat Treatment

ASME SA199:

T11: ≥650℃[1200℉]
T5, T9, T21, T22: ≥675℃[1250℉]
T91: Normalized 1400-1095℃[1900-2000℉]；Tempered≥730℃[1305℉]

ASME SA213:

T5, T9, T21, T22: full or isothermal anneal
Normalize and temper, 675℃[1250℉]

T11: full or isothermal anneal
Normalize and temper, 650℃[1200℉]

T91: Normalize and temper,
Austenitizing temperature: 1040-1080℃[1900-1975℉]
Subcritical annealing or tempering temperature: 730-800℃[1350-1470℉]

Comparison of Dimension Tolerance

1.Outside Diameter Tolerance

ASME SA199		ASME SA213
Size, in. [mm]	OD Tolerance	Size, in. [mm]	OD Tolerance
Hot-Finished Seamless Tube
-	-	OD≤4” [100mm]	+1/64” [0.4mm] -1/32” [0.8mm]
-	-	4” [100mm] <OD≤ 7-1/2 [200mm]	+1/64” [0.4mm] -3/64” [1.2mm]
-	-	7-1/2 [200mm] <OD≤ 9 [225mm]	+1/64” [0.4mm] -1/16” [1.6mm]
Cold-Finished Seamless Tube
OD<1” [25.4mm]	±0.004” [0.1mm]	OD<1” [25mm]	+0.004” [0.1mm] -0.004” [0.11mm]
1” [25.4mm] ≤OD≤ 1-1/2 [38.1mm]	±0.006” [0.15mm]	1” [25.4mm] ≤OD≤ 1-1/2 [40mm]	±0.006” [0.15mm]
1-1/2 [38.1mm] <OD< 2 [50.8mm]	±0.008” [0.2mm]	1-1/2 [40mm] <OD< 2 [50mm]	±0.008” [0.2mm]
2 [50.8mm] ≤OD< 2-1/2 [63.5mm]	±0.010” [0.25mm]	2 [50mm] ≤OD< 2-1/2 [65mm]	±0.010” [0.25mm]
2-1/2 [63.5mm] ≤OD< 3 [76.2mm]	±0.012” [0.3mm]	2-1/2 [65mm] ≤OD< 3 [75mm]	±0.012” [0.3mm]
3 [76.2mm] ≤OD≤ 4 [101.6mm]	±0.015” [0.38mm]	3 [75mm] ≤OD≤ 4 [100mm]	±0.015” [0.38mm]
4 [101.6mm] <OD≤ 7-1/2 [190.5mm]	+0.015” [0.38mm] -0.025” [0.64mm]	4 [100mm] <OD≤ 7-1/2 [200mm]	+0.015” [0.38mm] -0.025” [0.64mm]
7-1/2 [190.5mm] <OD≤ 9 [228.6mm]	+0.015” [0.38mm] -0.045” [1.14mm]	7-1/2 [200mm] <OD≤ 9 [225mm]	+0.015” [0.38mm] -0.045” [1.14mm]

2.Wall Thickness Tolerance

ASME SA199:

Size, in. [mm]

WT Tolerance

OD≤1-1/2 [38.1mm]

+20%

-0%

OD>1-1/2 [38.1mm]

+22%

-0%

ASME SA213:

Mini thickness:

Size, in. [mm]	WT Tolerance
Size, in. [mm]	WT≤0.095” [2.4mm]	0.095” [2.4mm]<WT≤0.15” [3.8mm]	0.15” [3.8mm] <WT≤0.18” [4.6mm]	WT>0.18” [4.6mm]
Hot-Finished Seamless Tube
OD≤4 [100mm]	+40% -0%	+35% -0%	+33% -0%	+28% -0%
OD>4 [100mm]	-	+35% -0%	+33% -0%	+28% -0%
Cold-Finished Seamless Tube
OD≤1-1/2 [38.1mm]	+20% -0%
OD>1-1/2 [38.1mm]	+22% -0%

Average thickness:

Cold formed tube: ±10%
Hot formed tube: As the below table

NPS & t/D Ratio

Wall Thickness Tolerance

1/8” [6mm]≤OD≤2-1/2” [65mm]

All t/D ratios

+20%

-12.5%

OD>2-1/2” [65mm]

t/D≤5%

+22.5%

-12.5%

OD>2-1/2” [65mm]

t/D>5%

+15%

-12.5%

Required Mechanical Property Tests

The requirements of both are the same in these tests:

Tension test: If a batch does not exceed 50 tubes, take one tube as a sample; if more than 50 tubes, take two tubes

Flattening test: Take one tube from each batch as a sample and perform a flattening test at both ends
Flaring test: Take one tube from each batch as a sample and perform a flattening test at both ends (the tube is not reused for other tests)
Hardness test: Brinell or Rockwell hardness test; take two tubes from each batch as samples

Hydrostatic test or Nondestructive test:

SA199: Each tube must undergo a Hydrostatic test; or with the purchasers consent, a nondestructive test may be used instead
SA213: Unless required by the customer, the supplier can choose one of these two tests; each tube must be tested

Product Marking

SA199: According to A450

Should include the name of the purchaser and the order number

SA213: According to A1016

Should include the condition, hot or cold work, wall designation, minimum or average wall thickness

ASME SA213 Boiler Tubes

Analysis of technical characteristics and application advantages of tube-fin heat exchangers

Basic introduction and system composition of pulverized coal industrial boiler