ASTM B861

ASTM B861

Chemical Requirements | Tensile Requirements | Dimension Requirements

Chemical Requirements

Chemical CompositionComposition Analysis
Grade 1 to 14
Element Grade
1		 Grade
2		 Grade
3		 Grade
5		 Grade
7		 Grade
9		 Grade
11		 Grade
12		 Grade
13		 Grade
14
Nitrogen, max 0.03 0.03 0.05 0.05 0.03 0.03 0.03 0.03 0.03 0.03
Carbon, max 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08
Hydrogen,B,C max 0.015 0.015 0.015 0.015 0.015 0.015 0.015 0.015 0.015 0.015
Iron, max 0.2 0.3 0.3 0.4 0.3 0.25 0.2 0.3 0.2 0.3
Oxygen, max 0.18 0.25 0.35 0.2 0.25 0.15 0.18 0.25 0.1 0.15
Aluminum 5.5±6.75 2.5±3.5
Vanadium 3.5±4.5 2.0±3.0
Tin
Ruthenium 0.04±0.06 0.04±0.06
Palladium 0.12±0.25 0.12±0.25
Molybdenum 0.2±0.4
Chromium
Nickel 0.6±0.9 0.4±0.6 0.4±0.6
Niobium
Zirconium
Silicon
Residuals,D,E,F max each 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
Residuals,D,E,F max total 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
TitaniumG balance balance balance balance balance balance balance balance balance balance
Grade 15 to 24
Element Grade 15 Grade 16 Grade 17 Grade 18 Grade 19 Grade 20 Grade 21 Grade 23 Grade 24
Nitrogen, max 0.05 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.05
Carbon, max 0.08 0.08 0.08 0.08 0.05 0.05 0.05 0.08 0.08
Hydrogen,B,C max 0.015 0.015 0.015 0.015 0.02 0.02 0.015 0.0125 0.015
Iron, max 0.3 0.3 0.2 0.25 0.3 0.3 0.4 0.25 0.4
Oxygen, max 0.25 0.25 0.18 0.15 0.12 0.12 0.17 0.13 0.2
Aluminum 2.5±3.5 3.0±4.0 3.0±4.0 2.5±3.5 5.5±6.5 5.5±6.75
Vanadium 2.0±3.0 7.5±8.5 7.5±8.5 3.5±4.5 3.5±4.5
Tin
Ruthenium 0.04±0.06
Palladium 0.04±0.08 0.04±0.08 0.04±0.08 0.04±0.08 0.04±0.08
Molybdenum 3.5±4.5 3.5±4.5 14.0±16.0
Chromium 5.5±6.5 5.5±6.5
Nickel 0.4±0.6
Niobium 2.2±3.2
Zirconium 3.5±4.5 3.5±4.5
Silicon 0.15±0.25
Residuals,D,E,F max each 0.1 0.1 0.1 0.1 0.15 0.15 0.1 0.1 0.1
Residuals,D,E,F max total 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
TitaniumG balance balance balance balance balance balance balance balance balance
Grade 25 to 36
Element Grade 25 Grade 26 Grade 27 Grade 28 Grade 29 Grade 33 Grade 34 Grade 35 Grade 36
Nitrogen, max 0.05 0.03 0.03 0.03 0.03 0.03 0.05 0.05 0.03
Carbon, max 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.04
Hydrogen,B,C max 0.0125 0.015 0.015 0.015 0.015 0.015 0.015 0.015 0.0035
Iron, max or range 0.4 0.3 0.2 0.25 0.25 0.3 0.3 0.20±0.80 0.03
Oxygen, max 0.2 0.25 0.18 0.15 0.13 0.25 0.35 0.25 0.16
Aluminum 5.5±6.75 2.5-3.5 5.5-6.5 4.0±5.0
Vanadium 3.5±4.5 2.0-3.0 3.5±4.5 1.1±2.1
Tin
Ruthenium 0.08-0.14 0.08-0.14 0.08-0.14 0.08-0.14 0.02-0.04 0.02-0.04
Palladium 0.04±0.08 0.01-0.02 0.01-0.02
Molybdenum 1.5±2.5
Chromium 0.1-0.2 0.1-0.2
Nickel 0.3±0.8 0.35-0.55 0.35-0.55
Niobium 42.0±47.0
Zirconium
Silicon 0.20±0.40
Residuals,D,E,F max each 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
Residuals,D,E,F max total 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
TitaniumG balance balance balance balance balance Remainder Remainder Remainder Remainder
Upon request and as stated in an order chemical composition checks are performed on a finished product. The table below specifies variations between different laboratories in the measurement of chemical composition content.
Product Analysis Limits, Permissible Variation
max or Range, % in Product Analysis
Aluminum 2.5 to 6.75 60.4
Carbon 0.1 0.02
Chromium 0.1 to 0.2 6 0.02
Chromium 5.5 to 6.5 6 0.30
Hydrogen 0.02 0.002
Iron 0.8 0.15
Molybdenum 0.2 to 0.4 6 0.03
Molybdenum 1.5 to 4.5 6 0.20
Molybdenum 14.0 to 16.0 60.5
Nickel 0.3 to 0.9 6 0.05
Niobium 2.2 to 3.2 6 0.15
Niobium >30 60.5
Nitrogen 0.05 0.02
Oxygen 0.3 0.03
Oxygen 0.31 to 0.40 6 0.04
Palladium 0.01 to 0.02 60.002
Palladium 0.04 to 0.08 60.005
Palladium 0.12 to 0.25 60.02
Ruthenium 0.02 to 0.04 60.005
Ruthenium 0.04 to 0.06 60.005
Ruthenium 0.08 to 0.14 60.01
Silicon 0.06 to 0.40 6 0.02
Vanadium 2.0 to 4.5 6 0.15
Vanadium 7.5 to 8.5 6 0.40
Zirconium 3.5 to 4.5 6 0.20
ResidualsA (each) 0.15 0.02

Tensile Requirements

Grade Tensile Strength, min Yield Strength (0.2 % Offset) Elongation 2 in. or 50 mm
ksi (MPa) Min Max gage length,
ksi (MPa) ksi (MPa) min %
1 35 -240 25 -170 45 -310 24
2 50 -345 40 -275 65 -450 20
3 65 -450 55 -380 80 -550 18
5 130 -895 120 -828 10
5B 160 -1103 150 -1034 6
7 50 -345 40 -275 65 -450 20
9 90 -620 70 -483 15
9C 90 -620 70 -483 12
9D 125 -860 105 -725 10
11 35 -240 25 -170 45 -310 24
12 70 -483 50 -345 18
13 40 -275 25 -170 24
14 60 -410 40 -275 20
15 70 -483 55 -380 18
16 50 -345 40 -275 65 -450 20
17 35 -240 25 -170 45 -310 24
18 90 -620 70 -483 15
18C 90 -620 70 -483 12
18D 125 -860 105 -725 10
19E 115 -793 110 -759 15
19B 135 -930 130 -897 159 -1096 10
19F 165 -1138 160 -1103 185 -1276 5
20E 115 -793 110 -759 15
20B 135 -930 130 -897 159 -1096 10
20F 165 -1138 160 -1103 185 -1276 5
21E 115 -793 110 -759 15
21B 140 -966 130 -897 159 -1096 15
21F 170 -1172 160 -1103 185 -1276 8
23 120 -828 110 -759 10
23C 120 -828 110 -759 7.5G, 6.0H
24 130 -895 120 -828 10
25 130 -895 120 -828 10
26 50 -345 40 -275 65 -450 20
27 35 -240 25 -170 45 -310 24
28 90 -620 70 -483 15
28C 90 -620 70 -483 12
28D 125 -860 105 -725 10
29 120 -828 110 -759 10
29C 120 -828 110 -759 7.5G, 6.0H
33 50 -345 40 -275 65 -450 20
34 65 -450 55 -380 80 -550 18
35 130 -895 120 -828 5
36 65 -450 60 -410 95 -655 10

Permissible Variations in Dimensions

DiameterThicknessLengthStraightness
Nominal Outside Diameter (NPS)A Permissible Variations in Outside Diameter
Over Under
1/8 in. to 11/2 in. (3.2 mm to 38 mm) 1/64 in. (0.397 mm) 1/32 in. (0.794 mm)
over 11/2 in. to 4 in. (38 mm to 102 mm) 1/32 1/32 in. (0.794 mm) 1/32 in. (0.794 mm)
over 4 in. to 8 in. (102 mm to 203 mm) 1/16 in. (1.588 mm) 1/32 in. (0.794 mm)
over 8 in. to 18 in. (203 mm to 432 mm) 3/32 in. (2.382 mm) 1/32 in. (0.794 mm)
ANPS = nominal pipe size
Variation is wall height should be limited to +/- 12.5% of the NPS standard wall thickness.
Pipes should be manufactured to the ordered length with no pipe being more than 6.4mm over the specified length.
Pipe should be free to any bends or kinks with bows not exceeding 1:500 for lengths up to 3m with bow not exceeding 1:400 for lengths greater than 3m.

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