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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
>60~801.81111
>80~10021.21.21.21.2
>100~1502.21.31.31.31.4
>150~2002.61.51.51.51.6

2. Allowed Deviation for Steel Plate and Steel Strip

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

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

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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