Everything You need to Know about
ASTM B443
Link to HPE
-
AEETHER
-
Blog
-
Alloy Knowledge
Overview
ASTM B443 specifies the technical requirements for Inconel 625 sheet, plate, coil and strip. Suppliers should strictly follow this standard when producing these materials. In this article, we will detail the noteworthy points and details in ASTM B443. This will help you make better decisions when purchasing and inspecting.
Product Properties
Products in ASTM B443
Inconel 625
Sheet
Inconel 625
Plate
Inconel 625
Coil
Inconel 625
Strip
ASTM B443 mainly includes four products: sheet, plate, coil and strip. The main way to distinguish them is size and production process. Generally speaking, the plate is thicker and is often produced by hot rolling. Sheet and strip are thinner and are often produced by cold rolling. Among them, the width of strip is narrower. Coil is a coiled sheet and plate. Its production process is determined by the thickness. The table below defines exactly how the different products differ.
Permissible Variations in Diameter or Distance
Between Parallel Surfaces of Cold-Worked Rod and Bar
Product
Thickness, in. (mm)
Hot-rolled plate
3/16 (4.8) and over
Cold-rolled plate
3/16 to 3/8 (4.8 to 9.5), incl
Hot-rolled sheet
0.018 to 0.250 (0.46 to 6.4), incl
Cold-rolled sheet
0.018 to 0.250 (0.46 to 6.4), incl
Cold-rolled strip
0.005 to 0.250 (0.13 to 6.4), incl
Mechanical Properties
Room Temperature Tensile Properties and Heat Treatment
Product
Tensile
Strength, min,
ksi (MPa)
Yield Strength
(0.2 % Offset),
min, ksi (MPa)
Elongation in 2
in. or 50 mm (or
4D), min, %
Grade I
UNS N (Annealed)
Cold-rolled sheet and strip
120 (827)
60 (414)
30
Hot-rolled sheet and hot-rolled plate up to 2.75 in. (70 mm), incl
110 (758)
55 (379)
30
Cold-rolled plate up to 0.375 in. (9.5 mm), incl
110 (758)
55 (379)
30
Grade II
UNS N (Solution Annealed)
Cold-rolled sheet and strip, hot-rolled sheet,
cold-rolled plate, and hot-rolled plate
100 (690)
40 (276)
30
All
UNS N (Solution Annealed)
All plate, sheet, and strip
96 (660)
39 (270)
50
Delivery State
Inconel 625 is specified in two states in the standard: Grade I (Annealed) and Grade II (Solution Annealed). If not specified, the supplier shall deliver in Grade I state. Alloys in the Grade II state have better creep properties at high temperatures. Therefore, if your application requires the alloy to operate at high temperatures, delivery in the Grade II condition should be specified with the supplier in advance.
The standard stipulates that all UNS N alloys are delivered in a solution annealed state.
Other Information
Dimension
The standard specifies the tolerances for thickness, width and length of different products in detail. You can refer to the tables below:
Permissible Variations in Thickness and Overweight of Rectangular Plates
Specified Thickness, in. (mm)
Permissible Excess in Average Weight, B,C per Square Foot of Plates for Widths Given in Inches (Millimetres)
Expressed in Percent of Nominal Weights
Under 48
()
48 to 60
( to
), excl
60 to 72
( to
), excl
72 to 84
( to
), excl
84 to 96
( to
), excl
96 to 108
( to
), excl
108 to 120
( to
), excl
120 to 132
( to
), excl
132 to 144
( to
), excl
144 to 160
( to
), excl
3/16 to 5/16 (4.8 to 7.9), excl
9.0
10.5
12.0
13.5
15.0
16.5
18.0
...
...
...
5/16 to 3/8 (7.9 to 9.5), excl
7.5
9.0
10.5
12.0
13.5
15.0
16.5
18.0
...
...
3/8 to 7/16 (9.5 to 11.1), excl
7.0
7.5
9.0
10.5
12.0
13.5
15.0
16.5
18.0
19.5
7/16 to 1/2 (11.1 to 12.7), excl
6.0
7.0
7.5
9.0
10.5
12.0
13.5
15.0
16.5
18.0
1/2 to 5/8 (12.7 to 15.9), excl
5.0
6.0
7.0
7.5
9.0
10.5
12.0
13.5
15.0
16.5
5/8 to 3/4 (15.9 to 19.1), excl
4.5
5.5
6.0
7.0
7.5
9.0
10.5
12.0
13.5
15.0
3/4 to 1 (19.1 to 25.4), excl
4.0
4.5
5.5
6.0
7.0
7.5
9.0
10.5
12.0
13.5
1 to 2 (25.4 to 50.8), incl
4.0
4.0
4.5
5.5
6.0
7.0
7.5
9.0
10.5
12.0
Permissible Variations in Thickness for Rectangular Plates Over 2 in. (51 mm) in Thickness
Specified Thickness, in. (mm)
Permissible Variations, in. (mm), over Specified Thickness for Widths Given, in. (mm)
To 36 (915), excl
36 to 60
(915 to
), excl
60 to 84
( to
), excl
84 to 120
( to
), excl
120 to 132
( to
), excl
132 (
and over)
Over 2 to 2 3/4 (51 to 69.8), incl
1/16 (1.6)
3/32 (2.4)
7/64 (2.8)
1/8 (3.2)
1/8 (3.2)
9/64 (3.6)
Permissible Variations in Thickness of Sheet and Strip
Specified Thickness, in. (mm), incl
Sheet
Hot-Rolled
Cold-Rolled
48 () and Under
Over 48 to 60 ( to ), incl
48 () and Under
Over 48 to 60 ( to ), incl
0.018 to 0.025 (0.5 to 0.6)
0.003 (0.08)
0.004 (0.10)
0.002 (0.05)
0.003 (0.08)
Over 0.025 to 0.034 (0.6 to 0.9)
0.004 (0.10)
0.005 (0.13)
0.003 (0.08)
0.004 (0.10)
Over 0.034 to 0.043 (0.9 to 1.1)
0.005 (0.13)
0.006 (0.15)
0.004 (0.10)
0.005 (0.13)
Over 0.043 to 0.056 (1.1 to 1.4)
0.005 (0.13)
0.006 (0.15)
0.004 (0.10)
0.005 (0.13)
Over 0.056 to 0.070 (1.4 to 1.8)
0.006 (0.15)
0.007 (0.18)
0.005 (0.13)
0.006 (0.15)
Over 0.070 to 0.078 (1.8 to 1.9)
0.007 (0.18)
0.008 (0.20)
0.006 (0.15)
0.007 (0.18)
Over 0.078 to 0.093 (1.9 to 2.4)
0.008 (0.20)
0.009 (0.23)
0.007 (0.18)
0.008 (0.20)
Over 0.093 to 0.109 (2.4 to 2.8)
0.009 (0.23)
0.010 (0.25)
0.007 (0.18)
0.009 (0.23)
Over 0.109 to 0.125 (2.8 to 3.2)
0.010 (0.25)
0.012 (0.31)
0.008 (0.20)
0.010 (0.25)
Over 0.125 to 0.140 (3.2 to 3.6)
0.012 (0.31)
0.014 (0.36)
0.008 (0.20)
0.010 (0.25)
Over 0.140 to 0.171 (3.6 to 4.3)
0.014 (0.36)
0.016 (0.41)
0.009 (0.23)
0.012 (0.31)
Over 0.171 to 0.187 (4.3 to 4.8)
0.015 (0.38)
0.017 (0.43)
0.010 (0.25)
0.013 (0.33)
Over 0.187 to 0.218 (4.8 to 5.5)
0.017 (0.43)
0.019 (0.48)
0.011 (0.28)
0.015 (0.38)
Over 0.218 to 0.234 (5.5 to 5.9)
0.018 (0.46)
0.020 (0.51)
0.012 (0.31)
0.016 (0.41)
Over 0.234 to 0.250 (5.9 to 6.4)
0.020 (0.51)
0.022 (0.56)
0.013 (0.33)
0.018 (0.46)
Cold-Rolled
Specified Thickness, in. (mm), incl
Widths 12 in. (305 mm) and under, plus and minus
Up to 0.050 (1.27), incl
0. (0.038)
Over 0.050 to 0.093 (1.27 to 2.39)
0. (0.063)
Over 0.093 to 0.125 (2.39 to 3.18)
0.004 (0.11)
Permissible Variations in Width of Sheared, Plasma Torch-Cut, and Abrasive-Cut Rectangular Plate
Specified Thickness
Permissible Variations in Widths for Widths Given, in. (mm)
Up to 30 (760), incl
Over 30 to 72 (760 to ), incl
Over 72 to 108 ( to ), incl
Over 108 to 144 ( to ), incl
Over 144 to 160 ( to ), incl
Plus
Minus
Plus
Minus
Plus
Minus
Plus
Minus
Plus
Minus
Inches
Sheared:
3/16 to 5/16, excl
3/16
1/8
1/4
1/8
3/8
1/8
1/2
1/8
...
...
5/16 to 1/2, excl
1/4
1/8
3/8
1/8
3/8
1/8
1/2
1/8
5/8
1/8
1/2 to 3/4, excl
3/8
1/8
3/8
1/8
1/2
1/8
5/8
1/8
3/4
1/8
3/4 to 1, excl
1/2
1/8
1/2
1/8
5/8
1/8
3/4
1/8
7/8
1/8
1 to 1 1/4, incl
5/8
1/8
5/8
1/8
3/4
1/8
7/8
1/8
1
1/8
Abrasive-cut:
3/16 to 1 1/4, incl
1/8
1/8
1/8
1/8
1/8
1/8
1/8
1/8
1/8
1/8
Over 1 1/4 to 2 3/4, incl
3/16
1/8
3/16
1/8
3/16
1/8
3/16
1/8
3/16
1/8
Plasma torch-cut:
3/16 to 2, excl
1/2
0
1/2
0
1/2
0
1/2
0
1/2
0
2 to 2 3/4, incl
5/8
0
5/8
0
5/8
0
5/8
0
5/8
0
Millimetres
Sheared:
4.8 to 7.9, excl
4.8
3.2
6.4
3.2
9.5
3.2
12.7
3.2
...
...
7.9 to 12.7, excl
6.4
3.2
9.5
3.2
9.5
3.2
12.7
3.2
15.9
3.2
12.7 to 19.1, excl
9.5
3.2
9.5
3.2
12.7
3.2
15.9
3.2
19.1
3.2
19.1 to 25.4, excl
12.7
3.2
12.7
3.2
15.8
3.2
19.1
3.2
22.2
3.2
25.4 to 31.8, incl
15.9
3.2
15.9
3.2
19.1
3.2
22.2
3.2
25.4
3.2
Abrasive-cut:
4.8 to 31.8, incl
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.2
Over 31.8 to 69.8, incl
4.8
3.2
4.8
3.2
4.8
3.2
4.8
3.2
4.8
3.2
Plasma torch-cut:
4.8 to 50.8, excl
12.7
0
12.7
0
12.7
0
12.7
0
12.7
0
50.8 to 69.8, incl
15.9
0
15.9
0
15.9
0
15.9
0
15.9
0
Permissible Variations in Diameter for Circular Plates
Sheared Plate
Specified Diameter, in. (mm)
Permissible Variations Over Specified Diameter for Thickness Given, in. (mm)
To 3&#;8 (9.5), incl
20 to 32 (508 to 813), excl
1/4 (6.4)
32 to 84 (813 to ), excl
5/1 6 (7.9)
84 to 108 ( to ), excl
3/8 (9.5)
108 to 140 ( to ), incl
7/16 (11.1)
Plasma Torch-Cut Plate
Specified Diameter, in. (mm)
Permissible Variations in Specified Diameter for Thickness Given, in. (mm)
Thickness max, in. (mm)
3/16 to 2 (4.8 to 50.8), excl
2 to 2-3/4 (50.8 to 69.8), incl
Plus
Minus
Plus
Minus
19 to 20 (483 to 508), excl
2-3/4 (69.8)
1/2 (12.7)
0
5/8 (15.9)
0
0 to 22 (508 to 559), excl
2-3/4 (69.8)
1/2 (12.7)
0
5/8 (15.9)
0
2 to 24 (559 to 610), excl
2-1/2 (63.5)
1/2 (12.7)
0
5/8 (15.9)
0
4 to 28 (610 to 711), excl
2-1/4 (57.3)
1/2 (12.7)
0
5/8 (15.9)
0
8 to 32 (711 to 812), excl
2 (50.8)
1/2 (12.7)
0
5/8 (15.9)
0
2 to 34 (812 to 864), excl
1-3/4 (44.5)
1/2 (12.7)
0
...
...
4 to 38 (864 to 965), excl
1-1/2 (38.1)
1/2 (12.7)
0
...
...
8 to 40 (965 to ), excl
1-1/4 (31.8)
1/2 (12.7)
0
...
...
0 to 140 ( to ), incl
2-3/4 (69.8)
1/2 (12.7)
0
5/8 (15.9)
0
Permissible Variations in Width of Sheet and Strip
Specified Thickness, in. (mm)
Specified Width, in. (mm)
Permissible Variations in Specified Width, in. (m)
Plus
Minus
Sheet
Up to 0.250 (6.35)
All
0.125 (3.18)
0
Strip
Under 0.075 (1.9)
Up to 12 (305), incl
0.007 (0.18)
0.007 (0.18)
Over 12 to 48 (305 to ), incl
0.062 (1.6)
0
0.075 to 0.100 (1.9 to 2.5), incl
Up to 12 (305), incl
0.009 (0.23)
0.009 (0.23)
Over 12 to 48 (305 to ), incl
0.062 (1.6)
0
Over 0.100 to 0.125 (2.5 to 3.2), incl
Up to 12 (305), incl
0.012 (0.30)
0.012 (0.30)
Over 12 to 48 (305 to ), incl
0.062 (1.6)
0
Over 0.125 to 0.160 (3.2 to 4.1), incl
Up to 12 (305), incl
0.016 (0.41)
0.016 (0.41)
Over 12 to 48 (305 to ), incl
0.062 (1.6)
0
Over 0.160 to 0.187 (4.1 to 4.7), incl
Up to 12 (305), incl
0.020 (0.51)
0.020 (0.51)
Over 12 to 48 (305 to ), incl
0.062 (1.6)
0
Over 0.187 to 0.250 (4.7 to 6.4), incl
Up to 12 (305), incl
0.062 (1.6)
0.062 (1.6)
Over 12 to 48 (305 to ), incl
0.062 (1.6)
0.062 (1.6)
Permissible Variations in Length of Sheared, Plasma Torch-Cut, and Abrasive-Cut Rectangular Plate
Specified Thickness
Permissible Variation in Length for Lengths Given, in. (mm)
Up to 60 (), incl
Over 60 to 96 ( to ), incl
Over 96 to 120 ( to ), incl
Over 120 to 240 ( to ), incl
Over 240 to 360 ( to ), incl
Over 360 to 450 ( to 11 430), incl
Over 450 to 540 (11 430 to 13 716), incl
Over 540 (13 716)
Plus
Minus
Plus
Minus
Plus
Minus
Plus
Minus
Plus
Minus
Plus
Minus
Plus
Minus
Plus
Minus
Inches
Sheared:
3/16 to 5/16, excl
3/16
1/8
1/4
1/8
3/8
1/8
1/2
1/8
5/8
1/8
3/4
1/8
7/8
1/8
...
...
5/16 to 1/2, excl
3/8
1/8
1/2
1/8
1/2
1/8
1/2
1/8
5/8
1/8
3/4
1/8
7/8
1/8
1
1/8
1/2 to 3/4, excl
1/2
1/8
1/2
1/8
5/8
1/8
5/8
1/8
3/4
1/8
7/8
1/8
1-1/8
1/8
1-3/8
1/8
3/4 to 1, excl
5/8
1/8
5/8
1/8
5/8
1/8
3/4
1/8
7/8
1/8
1-1/8
1/8
1-3/8
1/8
1-5/8
1/8
1 to 1-1/4, incl
3/4
1/8
3/4
1/8
3/4
1/8
7/8
1/8
1-1/8
1/8
1-3/8
1/8
1-5/8
1/8
...
...
Abrasive-cut:
3/16 to 1-1/4, incl
1/8
1/8
1/8
1/8
1/8
1/8
1/8
1/8
1/8
1/8
1/8
1/8
...
...
...
...
Over 1-1/4 to 2-3/4, incl
3/16
1/8
3/16
1/8
3/16
1/8
3/16
1/8
3/16
1/8
3/16
1/8
...
...
...
...
Plasma torch-cut:
3/16 to 2, excl
1/2
0
1/2
0
1/2
0
1/2
0
1/2
0
1/2
0
1/2
0
1/2
0
2 to 2-3/4
5/8
0
5/8
0
5/8
0
5/8
0
5/8
0
5/8
0
5/8
0
5/8
0
Millimetres
Sheared:
4.8 to 7.94, excl
4.8
3.2
6.4
3.2
9.5
3.2
12.7
3.2
15.9
3.2
19.0
3.2
22.2
3.2
...
...
7.94 to 12.7, excl
9.5
3.2
12.7
3.2
12.7
3.2
12.7
3.2
15.9
3.2
19.0
3.2
22.2
3.2
25.4
3.2
12.7 to 19.0, excl
12.7
3.2
12.7
3.2
15.9
3.2
15.9
3.2
19.0
3.2
22.2
3.2
28.6
3.2
34.9
3.2
19.0 to 25.4, excl
15.9
3.2
15.9
3.2
15.9
3.2
19.0
3.2
22.2
3.2
28.6
3.2
34.9
3.2
41.2
3.2
25.4 to 31.8, incl
19.0
3.2
19.0
3.2
19.0
3.2
22.2
3.2
28.6
3.2
34.9
3.2
41.2
3.2
...
...
Abrasive-cut:
4.8 to 31.8, incl
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.2
...
...
...
...
Over 31.8 to 69.9, incl
4.8
3.2
4.8
3.2
4.8
3.2
4.8
3.2
4.8
3.2
4.8
3.2
...
...
...
...
Plasma torch-cut:
4.8 to 50.8, excl
12.7
0
12.7
0
12.7
0
12.7
0
12.7
0
12.7
0
12.7
0
12.7
0
50.8 to 69.8, incl
15.9
0
15.9
0
15.9
0
15.9
0
15.9
0
15.9
0
15.9
0
15.9
0
Flatness
ASTM B443 also specifies flatness tolerances for plates. This requires suppliers to fine-tune equipment during hot rolling.
If you are looking for more details, kindly visit alloy 625 pipe.
Permissible Variations From Flatness of Rectangular, Circular, and Sketch Plates
Specified Thickness
Permissible Variations from a Flat Surface for Thickness and Widths Given, in. (mm)
To 48
(), excl
48 to 60
( to
), excl
60 to 72
( to
), excl
72 to 84
( to
), excl
84 to 96
( to
), excl
96 to 108
( to
), excl
108 to 120
( to
), excl
120 to 144
( to
), excl
144
()
and over
Inches
3/16 to 1/4, excl
1-1/2
2-1/8
2-1/2
2-3/4
3-1/4
3-1/4
...
...
...
1/4 to 3/8, excl
1-3/8
1-1/2
1-7/8
2-1/4
2-3/4
2-7/8
3-1/8
3-3/4
...
3/8 to 1/2, excl
1
1-1/8
1-3/8
1-1/2
1-7/8
2-1/4
2-1/2
2-7/8
3-1/2
1/2 to 3/4, excl
1
1-1/8
1-1/4
1-1/4
1-5/8
2-1/4
2-1/4
2-1/4
2-3/4
3/4 to 1, excl
1
1-1/8
1-1/4
1-1/4
1-1/2
1-5/8
1-7/8
2
2-1/4
1 to 2, excl
1
1-1/8
1-1/8
1-1/8
1-3/8
1-3/8
1-3/8
1-1/2
2
2 to 2-3/4, incl
1/2
5/8
3/4
7/8
1
1-1/8
1-1/4
1-1/2
1-3/4
Millimetres
4.8 to 6.4, excl
38.1
54.0
63.5
69.8
82.6
82.6
...
...
...
6.4 to 9.5, excl
34.9
38.1
47.6
57.2
69.8
73.0
79.4
95.2
...
9.5 to 12.7, excl
25.4
28.6
34.9
38.1
47.6
57.2
63.5
73.0
88.9
12.7 to 19.0, excl
25.4
28.6
31.8
31.8
41.3
57.2
57.2
57.2
69.8
19.0 to 25.4, excl
25.4
28.6
31.8
31.8
38.1
41.3
47.6
50.8
57.2
25.4 to 50.8, excl
25.4
28.6
28.6
28.6
34.9
34.9
34.9
38.1
50.8
50.8 to 70.0, incl
12.7
15.9
19.0
22.2
25.4
28.6
31.8
38.1
44.4
Straightness
The edgewise curvature (depth of chord) of flat sheet, strip, and plate shall not exceed 0.05 in. (1.27 mm) multiplied by the length in feet (0.04 mm multiplied by the length in centimeters).
Edges
Sheet and strip shall have sheared or slit edges. Plate shall have sheared or cut (machined, abrasive cut, powder cut, or inert arc cut) edges, as specified.
Squareness
For sheets of all thicknesses, the angle between adjacent sides shall be 90 ± 0.15° (1/16 in. in 24 in., 1.6 mm in 610 mm).
Certification
The supplier shall provide the material test certificate corresponding to the material before delivery. The certificate should include supplier and customer information, product size and delivery state, chemical composition and mechanical properties, size, standard and heat number.
Conclusion
ASTM B443 is mainly applicable to Inconel 625 sheets. The standard stipulates the chemical composition, mechanical properties, and dimensional tolerances of materials. Suppliers shall produce materials in strict accordance with standards.
We can produce Inconel 625 sheet, plate and strip according to the standard of ASTM B443. If you have any needs, you can contact us.