Stainless Steel Plate Thickness Tolerance Guide

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I. GB4237-2007 Hot Rolled Stainless Steel Plate and Strip

1. Allowed Thickness Deviation for Thick Steel Plate

Unit: Millimeters

Nominal ThicknessNominal Width
＞1000～≤1500＞1500～≤2000
Regular PrecisionHigher PrecisionRegular PrecisionHigher Precision
＞3.0～≤4.0±0.31±0.28±0.33±0.31
＞4.0～≤5.0±0.33±0.30±0.36±0.34
＞5.0～≤6.0±0.36±0.33±0.40±0.37
＞6.0～≤8.0±0.40±0.36±0.44±0.40
＞8.0～≤10.0±0.44±0.40±0.48±0.43
＞10.0～≤13.0±0.48±0.44±0.52±0.47
＞13.0～≤25.0±0.53±0.48±0.57±0.52
＞25.0～≤30.0±0.56±0.51±0.60±0.55
＞30.0～≤34.0±0.60±0.55±0.65±0.60
＞34.0～≤40.0±0.70±0.65±0.70±0.65
＞40.0～≤50.0±0.80±0.75±0.85±0.80
＞50.0～≤60.0±0.95±0.90±1.00±0.95
＞60.0～≤80.0±0.95±0.90±1.3±1.25
＞80.0～≤100.0±1.0±0.95±1.5±1.45
＞100.0～≤150.0±1.10±1.05±1.7±1.65
＞150.0～≤200.0±1.2±1.15±2.0±1.95

2. Allowed Thickness Deviation for Cut-to-length Plate and Steel Strip

Nominal ThicknessNominal Width
≤1200＞1200～≤1500＞1500～≤1800
Regular PrecisionHigher PrecisionRegular PrecisionHigher PrecisionRegular PrecisionHigher Precision
＞2.0～≤2.5±0.22±0.20±0.25±0.23±0.29±0.27
＞2.5～≤3.0±0.25±0.23±0.28±0.26±0.31±0.28
＞3.0～≤4.0±0.28±0.26±0.31±0.28±0.33±0.31
＞4.0～≤5.0±0.31±0.28±0.33±0.30±0.36±0.33
＞5.0～≤6.0±0.33±0.31±0.36±0.33±0.38±0.35
＞6.0～≤8.0±0.38±0.35±0.39±0.36±0.40±0.37
＞8.0～≤10.0±0.42±0.39±0.43±0.40±0.45±0.41
＞10.～≤13.0±0.45±0.42±0.47±0.44±0.49±0.45

II. GB4237-92 Hot Rolled Stainless Steel Plate and Strip

The steel currently purchased is in accordance with the GB4237-92 standard.

1. Allowed Tolerance for Thick Steel Plate

Nominal ThicknessNegative DeviationAllowed Thickness Deviation for the Following Widths
＞1200～1500＞1500～1700＞1700～1800＞1800～2000＞2000～2300
＞13～250.80.20.30.40.60.8
＞25～300.90.20.30.40.60.8
＞30～3410.30.30.40.60.8
＞34～401.10.40.50.60.70.9
＞40～501.20.50.60.70.81
＞50～601.30.70.80.811.1
＞60～801.8–1111
＞80～1002–1.21.21.21.2
＞100～1502.2–1.31.31.31.4
＞150～2002.6–1.51.51.51.6

2. Allowed Deviation for Steel Plate and Steel Strip

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Nominal ThicknessAllowed Thickness Deviation for the Following Widths
(Steel Plate and Steel Strip)600～750＞750～1000＞1000～1500
Higher PrecisionRegular PrecisionHigher PrecisionRegular PrecisionHigher PrecisionRegular Precision
＞0.35～0.50±0.05±0.07±0.05±0.07——
＞0.50～0.60±0.06±0.08±0.06±0.08——
＞0.60～0.75±0.07±0.09±0.07±0.09——
＞0.75～0.90±0.08±0.10±0.08±0.10——
＞0.90～1.10±0.09±0.11±0.09±0.12——
＞1.10～1.20±0.10±0.12±0.11±0.13±0.11±0.15
＞1.20～1.30±0.11±0.13±0.12±0.14±0.12±0.15
＞1.30～1.40±0.11±0.14±0.12±0.15±0.12±0.18
＞1.40～1.60±0.12±0.15±0.13±0.15±0.13±0.18
＞1.60～1.80±0.13±0.15±0.14±0.17±0.14±0.18
＞1.80～2.00±0.14±0.16±0.15±0.17±0.16±0.18
＞2.00～2.20±0.15±0.17±0.16±0.18±0.17±0.19
＞2.20～2.50±0.16±0.18±0.17±0.19±0.185±0.20
＞2.50～3.00±0.17±0.19±0.18±0.20±0.19±0.21
＞3.00～3.50±0.18±0.20±0.19±0.21±0.20±0.22
＞3.50～4.00±0.21±0.23±0.22±0.26±0.24±0.28
＞4.00～5.50-0.333333333-0.5-0.5-3-0.25-0.6
＞5.00～7.5-0.25-0.4-0.2-0.333333333-0.2-0.416666667
＞7.50～10.0-0.142857143-0.25-0.142857143-0.25-0.285714286-0.375
＞10.0～13.0-0.142857143-0.25-0.142857143-0.25-0.285714286-0.375

III. GB3280-2007 Cold Rolled Stainless Steel Plate and Strip

Allowed Thickness Deviation for Steel Plate and Steel Strip:

Nominal ThicknessNominal Width
≤1000≥1000~1≤300≥1300~≤2100
≥0.3-0.5±0.04±0.45—
≥0.5-0.6±0.045±0.05—
≥0.6-0.8±0.05±0.055—
≥0.8-1.00±0.040±0.045
≥1.00-1.20±0.055±0.06±0.065
≥1.20-1.50±0.07±0.08±0.09
≥1.50-2.00±0.08±0.09±0.10
≥2.00-2.50±0.09±0.10±0.11
≥25.0-3.00±0.11±0.12±0.12
≥3.00-4.00±0.13±0.14±0.14
≥4.00-5.00±0.14±0.15±0.15
≥5.00-6.50±0.15±0.16±0.16
≥6.50-8.00±0.16±0.17±0.17

IV. The steel currently purchased adheres to the GB3280-92 standard

GB3280-1992 Cold Rolled Stainless Steel Plate and Steel Strip

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Nominal ThicknessNominal Width
A-Level PrecisionB-Level Precision
≤1500＞1500～≤2000≤1500＞1500～≤2000
＞0.2～0.5±0.04—±0.05—
＞0.5～0.65±0.05—±0.06—
＞0.65～0.90±0.06—±0.07—
＞0.90～1.10±0.07±0.09±0.09±0.11
＞1.10～1.20±0.09±0.10±0.10±0.12
＞1.20～1.40±0.10±0.12±0.11±0.14
＞1.40～1.50±0.11±0.13±0.12±0.15
＞1.50～1.80±0.12±0.14±0.14±0.16
＞1.80～2.00±0.13±0.15±0.15±0.17
＞2.00～2.50±0.14±0.17±0.16±0.18
＞2.50～3.00±0.16±0.19±0.18±0.20
＞3.00～3.50±0.18±0.20±0.20±0.21
＞3.50～4.00±0.19±0.21±0.22±0.24
＞4.00～5.00±0.20±0.22±0.23±0.25

V. Thickness Tolerance for Japanese SUS Hot Rolled Stainless Steel JIS G4304-2005

Unit: Millimeters

Nominal ThicknessSteel Plate Width
1000~12501250~16001600~20002000~2500
2~2.5±0.25±0.30——
2.5~3.15±0.30±0.35±0.40—
3.15~4.0±0.35±0.40±0.45—
4.0~5.0±0.40±0.45±0.50±0.60
5.0~6.0±0.50±0.55±0.60±0.70
6.0~8.0±0.60±0.65±0.65±0.75
8.0~10.0±0.65±0.65±0.65±0.80
10.0~16.0±0.70±0.70±0.70±0.85
16.0~25.0±0.80±0.80±0.80±0.95
25.0~40.0±0.90±0.90±0.90±1.10
40.0~63.0±1.0±1.0±1.20±1.20
63.0~100±1.10±1.20±1.30±1.30
100~160±1.30±1.30±1.40±1.40
160~200±1.60±1.60±1.70±1.70

VI. Thickness Tolerance for Japanese SUS Cold Rolled Stainless Steel JIS G4305-2005

Unit: Millimeters

Nominal ThicknessSteel Plate Width
~12501250~1600
0.16~0.25±0.03—
0.25~0.30±0.04—
0.30~0.60±0.05±0.08
0.60~0.80±0.07±0.09
0.80~1.00±0.09±0.10
1.00~1.25±0.10±0.12
1.25~1.60±0.12±0.15
1.60~2.00±0.15±0.17
2.00~2.50±0.17±0.20
2.50~3.15±0.22±0.25
3.15~4.00±025±0.30
4.00~5.00±0.35±0.40
5.00~6.00±0.40±0.45
6.00~8.00±0.50±0.50
8.00~10.00±0.60±0.60
10.0~16.00±0.70±0.70
16.0~25.0±0.80±0.80

VII. U.S. ASTM A240 A480 Steel Plate Thickness Tolerance

1. Allowed Thickness Deviation for ASTM A480 Hot Rolled Wide Coil and Cut-to-Length Plate

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Thickness
A，in.[mm]		Allowed Deviation, for Specified Width（w）,±，in.[mm]
w≤60[1525]w＞60[1525]
0.072[1.83]0.006[0.15]0.009[0.22]
＞0.072[1.83]-0.083[2.11]0.007[0.18]0.010[0.25]
＞0.083[2.11]-0.098[2.49]0.008[0.20]0.011[0.27]
＞0.098[2.49]-0.114[2.90]0.009[0.23]0.012[0.30]
＞0.114[2.90]-0.130[3.30]0.011[0.27]0.013[0.33]
＞0.130[3.30]-0.145[3.68]0.012[0.30]0.013[0.33]
＞0.145[3.68]-0.1875[4.76]0.013[0.33]0.014[0.35]
＞0.1875[4.76]-0.250[6.35]-0.010[0.25],+0.020[0.50]-0.010[0.25],+0.020[0.50]
＞0.250[6.35]-0.3125[7.94]-0.010[0.25],+0.022[0.55]-0.010[0.25],+0.022[0.55]
＞0.3125[7.94]-0.010[0.25],+0.030[0.75]-0.010[0.25],+0.030[0.75]
The thickness of A thin plate is measured no less than 3/8 inch [9.52 mm] from the edge.

2. Allowed Thickness Deviation for ASTM A480 Cold Rolled Wide Coil and Cut-to-Length Plate

Thickness
A、B，in.[mm]		Allowed Deviation, for Specified Width（w）,±，in.[mm]
W≤40[1000]40[1000]＜w≤50[1300]50[1300]＜w≤84[2100]
0.012[0.30]0.001[0.030]––
0.016[0.40]0.0015[0.04]0.0015[0.04]–
0.020[0.50]0.0015[0.04]0.0015[0.04]–
0.024[0.60]0.002[0.05]0.002[0.05]–
0.032[0.80]0.002[0.05]0.002[0.05]–
0.040[1.00]0.0025[0.06]0.0025[0.06]0.003[0.08]
0.047[1.20]0.003[0.08]0.003[0.08]0.003[0.08]
0.059[1.50]0.003[0.08]0.003[0.08]0.004[0.10]
0.079[2.00]0.004[0.10]0.004[0.10]0.0045[0.11]
0.098[2.50]0.004[0.10]0.004[0.10]0.005[0.13]
0.118[3.00]0.005[0.13]0.005[0.13]0.006[0.15]
0.157[4.00]0.007[0.17]0.007[0.17]0.007[0.17]
0.197[5.00]0.007[0.17]0.007[0.17]0.0075[0.19]
0.236[6.00]0.007[0.17]0.008[0.20]0.009[0.23]
0.3125[8.00]0.007[0.17]0.009[0.23]0.010[0.25]
The thickness of A thin plate is measured at a point no less than 3/8 inch [9.52 mm] from the edge.
B When outside the specified thickness, the deviation of the next thicker size is used.

3. Allowed Thickness Deviation for ASTM A480 Hot Rolled Medium Plate A, B

Thickness
(t)，in.[mm]		Width (w)，in.[mm]
w≤84[2134]84[2134]＜w≤120[3048]120[3048]＜w≤144[3658]w＞144[3658]
Positive Thickness Deviation C，in.[mm]
t＜3/16[4.76]0.055[1.35]0.070[1.78]––
3/16[4.76]≤t＜3/8[9.52]0.045[1.14]0.050[1.27]0.085[2.16]–
3/8[9.52]≤t＜3/4[19.05]0.055[1.40]0.060[1.52]0.085[2.16]0.090[2.29]
3/4[19.05]≤t＜1[25.40]0.060[1.52]0.065[1.65]0.085[2.16]0.100[2.54]
1[25.40]≤t＜2[50.80]0.070[1.78]0.075[1.90]0.095[2.41]0.115[2.92]
2[50.80]≤t＜3[76.20]0.125[3.20]0.150[3.80]0.175[4.45]0.200[5.08]
3[76.20]≤t＜4[101.6]0.150[3.81]0.160[4.06]0.200[5.08]0.225[5.72]
4[101.6]≤t＜6[152.4]0.180[4.57]0.200[5.08]0.335[8.50]0.355[9.02]
6[152.4]≤t＜8[203.2]0.235[6.00]0.255[6.48]0.355[9.02]0.435[11.0]
8[203.2]≤t＜10[254.0]0.315[8.00]0.335[8.50]0.435[11.0]0.550[14.0]
A Thickness is measured along the longitudinal edge not less than 3/8 in. [9.52 mm], but no greater than 3 in. [76.20 mm] from the edge.
B For steel plates with thickness less than or equal to 10 in. [254.0 mm], the negative deviation is 0.010 in. [0.25 mm].
C For round shapes, the thickness tolerance is executed within the table’s width range for its diameter; for irregular steel plates, the positive tolerance is executed within the table’s width range for its maximum width.

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