Kochlin SPECIAL ALLOYS · SINCE 2009

Corrosion-resistant alloy strip and sheet

Cold-rolled strip and sheet in coils or cut lengths, slit to width, with an 8K mirror finish available.

Supply range

Strip
Thickness0.05 – 4.76 mm
FormCoils or cut lengths; slit to width
FinishPickled or bright; 8K mirror finish available

Sizes and conditions outside the standards can be supplied by agreement; please confirm on enquiry.

Types

Cold-rolled strip

Narrower widths, usually supplied in coils.

Sheet

Wider widths, usually supplied in cut lengths.

Foil

Very thin strip for bellows, seals and electronic parts.

Thickness, width and length tolerances

Units

Permitted variations in thickness, width and length when ordered to the standard. If you need closer tolerances, state them in your enquiry.

ASTM B127, B162, B168, B409, B424, B443Nickel alloy sheet and stripThickness ±0.038 – 0.56 mm±0.0015 – 0.022 in

Measured at least 9.5 mm (⅜ in) from any edge; strip under 25.4 mm (1 in) wide may be measured anywhere. Strip over 3.2 mm (0.125 in) thick, and strip over 305 mm (12 in) wide, takes the sheet tolerances.

Sheet, thickness tolerance (±)

Thickness mminHot-rolled sheet, width mminCold-rolled sheet, width mmin
≤ 1220≤ 48> 1220 – 1520> 48 – 60≤ 1220≤ 48> 1220 – 1520> 48 – 60
0.5 – 0.60.018 – 0.0250.080.0030.100.0040.050.0020.080.003
> 0.6 – 0.9> 0.025 – 0.0340.100.0040.130.0050.080.0030.100.004
> 0.9 – 1.1> 0.034 – 0.0430.130.0050.150.0060.100.0040.130.005
> 1.1 – 1.4> 0.043 – 0.0560.130.0050.150.0060.100.0040.130.005
> 1.4 – 1.8> 0.056 – 0.0700.150.0060.180.0070.130.0050.150.006
> 1.8 – 1.9> 0.070 – 0.0780.180.0070.200.0080.150.0060.180.007
> 1.9 – 2.4> 0.078 – 0.0930.200.0080.230.0090.180.0070.200.008
> 2.4 – 2.8> 0.093 – 0.1090.230.0090.250.0100.180.0070.230.009
> 2.8 – 3.2> 0.109 – 0.1250.250.0100.310.0120.200.0080.250.010
> 3.2 – 3.6> 0.125 – 0.1400.310.0120.360.0140.200.0080.250.010
> 3.6 – 4.3> 0.140 – 0.1710.360.0140.410.0160.230.0090.310.012
> 4.3 – 4.8> 0.171 – 0.1870.380.0150.430.0170.250.0100.330.013
> 4.8 – 5.5> 0.187 – 0.2180.430.0170.480.0190.280.0110.380.015
> 5.5 – 5.9> 0.218 – 0.2340.460.0180.510.0200.310.0120.410.016
> 5.9 – 6.4> 0.234 – 0.2500.510.0200.560.0220.330.0130.460.018

Cold-rolled strip up to 305 mm (12 in) wide

Thickness mminTolerance (±) mmin
≤ 1.27≤ 0.0500.0380.0015
> 1.27 – 2.39> 0.050 – 0.0930.0630.0025
> 2.39 – 3.18> 0.093 – 0.1250.110.004
Width

Width tolerance of strip; sheet (up to 6.35 mm thick) is +3.18 / 0 mm (+0.125 / 0 in) at all widths

Thickness mminWidth mmin
≤ 305≤ 12> 305 – 1219> 12 – 48
< 1.9< 0.075±0.18±0.007+1.6 / 0+0.062 / 0
1.9 – 2.50.075 – 0.100±0.23±0.009+1.6 / 0+0.062 / 0
> 2.5 – 3.2> 0.100 – 0.125±0.30±0.012+1.6 / 0+0.062 / 0
> 3.2 – 4.1> 0.125 – 0.160±0.41±0.016+1.6 / 0+0.062 / 0
> 4.1 – 4.7> 0.160 – 0.187±0.51±0.020+1.6 / 0+0.062 / 0
> 4.7 – 6.4> 0.187 – 0.250±1.6±0.062±1.6±0.062
ASTM B333, B435, B575, B582Nickel alloy sheet and stripPlus thickness 0.10 – 0.46 mm0.004 – 0.018 inMinus thickness 0.10 – 0.25 mm0.004 – 0.010 in

Strip of all widths and sheet up to 1220 mm (48 in) wide; measured at least 9.5 mm (⅜ in) from any edge. Light surface imperfections may be buffed out to a depth within the minus tolerance.

Thickness mminPlus mminMinus mmin
0.51 – 0.860.020 – 0.0340.100.0040.100.004
> 0.86 – 1.42> 0.034 – 0.0560.130.0050.130.005
> 1.42 – 1.78> 0.056 – 0.0700.150.0060.150.006
> 1.78 – 1.98> 0.070 – 0.0780.180.0070.180.007
> 1.98 – 2.36> 0.078 – 0.0930.200.0080.200.008
> 2.36 – 2.77> 0.093 – 0.1090.230.0090.230.009
> 2.77 – 3.18> 0.109 – 0.1250.250.0100.250.010
> 3.18 – 3.56> 0.125 – 0.1400.330.0130.250.010
> 3.56 – 4.34> 0.140 – 0.1710.410.0160.250.010
> 4.34 – 4.75> 0.171 – 0.1870.460.0180.250.010
Width
Thickness mminWidth mminTolerance mmin
Sheet
≤ 4.76≤ 0.187≥ 50.8≥ 2+3.18 / 0+0.125 / 0
Strip (slit edges)
> 0.51 – 1.90> 0.020 – 0.075≤ 610≤ 24±0.18±0.007
> 1.90 – 2.54> 0.075 – 0.100≤ 610≤ 24±0.23±0.009
> 2.54 – 3.18> 0.100 – 0.125≤ 610≤ 24±0.30±0.012
ASTM B625, B688, B463, B709Super-austenitic stainless and iron-nickel alloy sheet and stripThickness ±0.03 – 0.36 mm±0.001 – 0.014 in

State the edge (No. 1, 3 or 5) when ordering strip; width tolerances depend on it. Material ordered to A240 follows the stainless group below.

Hot-rolled sheet in cut lengths; cold-rolled sheet in cut lengths and coils

Thickness mminTolerance (±) mmin
0.130.0050.030.001
> 0.13 – 0.18> 0.005 – 0.0070.040.0015
> 0.18 – 0.41> 0.007 – 0.0160.050.002
> 0.41 – 0.66> 0.016 – 0.0260.080.003
> 0.66 – 1.02> 0.026 – 0.0400.100.004
> 1.02 – 1.47> 0.040 – 0.0580.130.005
> 1.47 – 1.83> 0.058 – 0.0720.150.006
> 1.83 – 2.11> 0.072 – 0.0830.180.007
> 2.11 – 2.49> 0.083 – 0.0980.200.008
> 2.49 – 2.90> 0.098 – 0.1140.230.009
> 2.90 – 3.30> 0.114 – 0.1300.250.010
> 3.30 – 3.68> 0.130 – 0.1450.300.012
> 3.68 – < 4.76> 0.145 – < 3/160.360.014

Cold-rolled strip in coils and cut lengths, crown included

Thickness mminWidth; tolerance (±) mmin
4.76 – 1523/16 – 6> 152 – 305> 6 – 12> 305 – < 610> 12 – < 24
0.13 – 0.250.005 – 0.01010 %10 %10 %
> 0.25 – 0.28> 0.010 – 0.0110.040.00150.040.00150.040.0015
> 0.28 – 0.33> 0.011 – 0.0130.040.00150.040.00150.050.002
> 0.33 – 0.43> 0.013 – 0.0170.040.00150.050.0020.050.002
> 0.43 – 0.51> 0.017 – 0.0200.040.00150.050.0020.060.0025
> 0.51 – 0.74> 0.020 – 0.0290.050.0020.060.00250.060.0025
> 0.74 – 0.89> 0.029 – 0.0350.050.0020.080.0030.080.003
> 0.89 – 1.27> 0.035 – 0.0500.060.00250.090.00350.090.0035
> 1.27 – 1.75> 0.050 – 0.0690.080.0030.090.00350.090.0035
> 1.75 – 2.54> 0.069 – 0.1000.080.0030.100.0040.130.005
> 2.54 – 2.98> 0.100 – 0.1250.100.0040.110.00450.130.005
> 2.98 – 4.09> 0.125 – 0.1610.110.00450.110.00450.130.005
> 4.09 – < 4.76> 0.161 – < 3/160.130.0050.130.0050.150.006
Strip width; sheet width, length and flatness

Cold-rolled strip width (±), No. 3 edge

Thickness mminWidth mmin
4.76 – < 12.703/16 – < 1/212.70 – 152.401/2 – 6> 152.40 – 228.60> 6 – 9> 228.60 – 304.80> 9 – 12> 304.80 – 508.00> 12 – 20> 508.00 – 609.60> 20 – 24
≤ 1.73≤ 0.0680.130.0050.130.0050.130.0050.250.0100.410.0160.510.020
1.75 – 2.510.069 – 0.0990.200.0080.200.0080.250.0100.250.0100.410.0160.510.020
2.54 – 4.060.100 – 0.1600.250.0100.250.0100.410.0160.410.0160.510.0200.510.020
4.09 – < 4.760.161 – < 3/16—0.410.0160.510.0200.510.0200.790.0310.790.031

Cold-rolled strip width (±), No. 1 and No. 5 edges

EdgeWidth mminThickness mminTolerance (±) mmin
1, 5≤ 7.14≤ 9/32≤ 1.59≤ 1/160.130.005
1, 5> 7.14 – 19.05> 9/32 – 3/4≤ 2.38≤ 3/320.130.005
1, 5> 19.05 – 127> 3/4 – 5≤ 3.18≤ 1/80.130.005
5> 127.00 – 228.60> 5 – 90.20 – 3.180.008 – 1/80.250.010
5> 228.60 – 508.00> 9 – 200.38 – 2.670.015 – 0.1050.250.010
5> 508.00> 200.58 – 2.030.023 – 0.0800.380.015
  • Resquared (stretcher-levelled) sheet: under 3.33 mm (0.131 in) thick, +1.59 mm (1/16 in) under 1219 mm (48 in) wide and +3.18 mm (⅛ in) at 1219 mm and over, +1.59 mm under 3048 mm (120 in) long and +3.18 mm at 3048 mm and over; 3.33 mm and thicker, +6.35 mm (¼ in) on all widths and lengths; no minus tolerance.
  • Sheet not resquared and cold-rolled coil (under 4.76 mm thick): width +1.59 mm from 610 to under 1219 mm (24 – 48 in), +3.18 mm at 1219 mm and over; length +6.35 mm up to 3048 mm (10 ft), +12.70 mm to 6096 mm (20 ft); no minus tolerance.
  • Flatness of stretcher-levelled sheet (under 4.76 mm thick): 3.18 mm up to 1219 mm wide and 2438 mm (96 in) long, 6.35 mm otherwise.
  • Camber in any 2438 mm (8 ft): sheet not resquared and cold-rolled coil, 3.18 mm for 610 – 914 mm wide and 2.38 mm over 914 mm; cold-rolled strip, 12.70 mm up to 38.10 mm wide and 6.35 mm from 38.10 to 609.60 mm.
ASTM A240Stainless steel strip and sheetCold-rolled strip ±0.010 – 0.090 mm±0.0006 – 0.006 inCold-rolled sheet ±0.03 – 0.25 mm±0.001 – 0.010 in

Under 600 mm (24 in) wide is narrow (strip), wider is wide (sheet and coil). Material ordered in mm follows the metric table and material ordered in inches the inch table; the two are banded differently. For a thickness not shown, use the next greater thickness.

Cold-rolled narrow product (strip), crown included

Thickness mmWidth; tolerance (±) mm
≤ 125> 125 – 250> 250 – < 600
0.150.0100.0150.020
0.250.0150.0200.025
0.500.0250.0300.035
0.750.0300.0400.050
1.000.0300.0400.050
1.250.0350.0450.050
1.500.0400.0500.060
1.750.0500.0600.070
2.000.0500.0600.070
2.500.0500.0700.080
3.000.0600.0700.090
4.000.0700.0700.090
4.990.0700.0700.090

Cold-rolled narrow product (strip), crown included

Thickness inWidth; tolerance (±) in
≤ 6> 6 – 12> 12 – 24
0.002 – < 0.00510 %10 %10 %
0.005 – 0.0100.00060.00080.001
> 0.010 – 0.0120.0010.0010.001
> 0.012 – 0.0150.0010.00150.0015
> 0.015 – 0.0200.0010.00150.0015
> 0.020 – 0.0290.00150.00150.002
> 0.029 – 0.0350.00150.0020.002
> 0.035 – 0.0500.00250.0030.003
> 0.050 – 0.0690.0030.0030.003
> 0.069 – 0.1000.0030.0030.004
> 0.100 – 0.1250.0040.0040.005
> 0.125 – 0.1610.0050.0050.005
> 0.161 – < 3/160.0050.0050.006

Cold-rolled wide product (sheet and coil)

Thickness mmWidth; tolerance (±) mm
≤ 1000> 1000 – 1300> 1300 – 2100
0.300.03——
0.400.040.04—
0.500.0450.05—
0.600.050.05—
0.800.050.05—
1.000.0550.060.07
1.200.080.080.08
1.500.080.080.10
2.000.100.100.11
2.500.100.110.13
3.000.130.130.15
4.000.170.170.17
5.000.170.170.19
6.000.170.200.23
8.000.170.220.25

Cold-rolled wide product (sheet and coil)

Thickness inWidth; tolerance (±) in
≤ 40> 40 – 50> 50 – 84
0.0120.001——
0.0160.00150.0015—
0.0200.00150.0015—
0.0240.0020.002—
0.0320.0020.002—
0.0400.00250.00250.003
0.0470.0030.0030.003
0.0590.0030.0030.004
0.0790.0040.0040.0045
0.0980.0040.0040.005
0.1180.0050.0050.006
0.1570.0070.0070.007
0.1970.0070.0070.0075
0.2360.0070.0080.009
0.31250.0070.0090.010
Strip width and length

Cold-rolled narrow product width (±), No. 3 edge

Thickness mmWidth mm
≤ 40> 40 – 125> 125 – 250> 250 – 600
0.250.0850.100.1250.50
0.500.100.1250.150.50
1.000.1250.1250.200.50
1.500.1250.150.250.50
2.50—0.200.300.50
3.00—0.250.300.60
4.00—0.250.400.60
4.99—0.400.500.60

Cold-rolled narrow product width (±), No. 3 edge

Thickness inWidth in
≤ 1.60> 1.60 – 6> 6 – 12> 12 – 24
0.0100.0030.0040.0050.020
0.0200.0050.0050.0100.020
0.0400.0050.0050.0100.020
0.0600.0050.0060.0100.020
0.100—0.0100.0160.020
0.120—0.0100.0160.024
0.160—0.0160.0160.024
0.200—0.0300.0300.030

Cold-rolled narrow product, cut length

Length mmTolerance mm
≤ 1500+3 / 0
> 1500 – 4000+5 / 0
> 4000 – 6000+8 / 0

Cold-rolled narrow product, cut length

LengthTolerance in
≤ 6 ft+1/8 / 0
> 6 – 12 ft+0.2 / 0
> 12 – 20 ft+0.3 / 0
ASTM B265Titanium and titanium alloy sheet and stripCold-rolled sheet ±0.03 – 0.36 mm±0.001 – 0.014 inStrip ±0.03 – 0.16 mm±0.001 – 0.006 in

Material 610 mm (24 in) wide and over is sheet, narrower is strip. State cold- or hot-rolled when ordering sheet; if not stated, cold-rolled tolerances apply.

Sheet, thickness tolerance (±)

Thickness mminCold-rolled sheetHot-rolled sheet, width mmin
≤ 2134≤ 84> 2134> 84
0.130.0050.030.001——
0.15 – 0.180.006 – 0.0070.040.0015——
0.20 – 0.410.008 – 0.0160.050.002——
0.43 – 0.660.017 – 0.0260.080.003——
0.69 – 1.020.027 – 0.0400.100.004——
1.04 – 1.470.041 – 0.0580.130.005——
1.50 – 1.830.059 – 0.0720.150.006——
1.85 – 2.110.073 – 0.0830.180.007——
2.13 – 2.490.084 – 0.0980.200.008——
2.51 – 2.900.099 – 0.1140.230.009——
2.92 – 3.300.115 – 0.1300.250.0100.5080.020—
3.33 – 3.680.131 – 0.1450.310.0120.5580.0220.710.028
3.71 – < 4.760.146 – < 0.18750.360.0140.640.0250.710.028

Strip, thickness tolerance (±)

Thickness mminWidth mmin
4.76 – < 25.43/16 – < 125.4 – < 76.21 – < 376.2 – 152.43 – 6> 152.4 – 228.6> 6 – 9> 228.6 – 304.8> 9 – 12> 304.8 – 406.4> 12 – 16> 406.4 – 508.0> 16 – 20> 508.0 – 609.6> 20 – 24
0.250.0100.030.0010.030.0010.030.0010.030.001—0.030.0010.040.00150.040.0015
0.280.0110.030.0010.030.0010.030.0010.030.0010.030.0010.040.00150.040.00150.040.0015
0.300.0120.030.0010.030.0010.030.0010.030.0010.030.0010.040.00150.040.00150.040.0015
0.33 – 0.410.013 – 0.0160.030.0010.030.0010.030.0010.040.00150.040.00150.040.00150.050.0020.050.002
0.43 – 0.480.017 – 0.0190.030.0010.030.0010.030.0010.040.00150.040.00150.050.0020.050.0020.050.002
0.51 – 0.640.020 – 0.0250.030.0010.030.0010.040.00150.050.0020.050.0020.050.0020.060.00250.060.0025
0.66 – 0.710.026 – 0.0280.030.0010.040.00150.040.00150.050.0020.050.0020.050.0020.060.00250.080.003
0.74 – 0.860.029 – 0.0340.040.00150.040.00150.050.0020.060.00250.060.00250.060.00250.080.0030.080.003
0.89 – 0.990.035 – 0.0390.050.0020.050.0020.060.00250.080.0030.080.0030.080.0030.080.0030.080.003
1.02 – 1.240.040 – 0.0490.050.0020.050.0020.060.00250.080.0030.080.0030.080.0030.100.0040.100.004
1.27 – 1.730.050 – 0.0680.050.0020.050.0020.080.0030.080.0030.080.0030.080.0030.100.0040.100.004
1.75 – 2.510.069 – 0.0990.050.0020.050.0020.080.0030.080.0030.080.0030.100.0040.100.0040.100.004
2.54 – 4.060.100 – 0.1600.050.0020.050.0020.080.0030.100.0040.100.0040.100.0040.130.0050.130.005
4.09 – < 4.760.161 – < 3/160.050.0020.080.0030.100.0040.100.0040.100.0040.130.0050.160.0060.160.006
Width, length, flatness and weight

Strip width (±), No. 3 edge

Thickness mminWidth mmin
4.76 – < 12.703/16 – < 1/212.70 – 152.401/2 – 6> 152.40 – 228.60> 6 – 9> 228.60 – 304.80> 9 – 12> 304.80 – 508.0> 12 – 20> 508.0 – < 609.6> 20 – < 24
≤ 1.73≤ 0.0680.130.0050.130.0050.130.0050.250.0100.410.0160.510.020
1.75 – 2.510.069 – 0.0990.200.0080.200.0080.250.0100.250.0100.410.0160.510.020
2.54 – 4.060.100 – 0.1600.250.0100.250.0100.410.0160.410.0160.510.0200.510.020
4.09 – < 4.760.161 – < 3/16—0.410.0160.510.0200.510.0200.790.0310.790.031

Strip length

LengthTolerance mmin
≤ 1524 mm≤ 5 ft+9.52 / 0+3/8 / 0
> 1524 – 3048 mm> 5 – 10 ft+12.70 / 0+1/2 / 0
> 3048 – 6096 mm> 10 – 20 ft+15.88 / 0+5/8 / 0
  • Strip under 0.25 mm (0.010 in) thick: ±10 % up to 406 mm (16 in) wide, ±15 % from 406 to 608 mm (16 – 23 15/16 in). Strip thickness is measured 9.5 mm (⅜ in) from the edge; under 25.4 mm (1 in) wide, anywhere.
  • Cold-rolled sheet (under 4.76 mm thick): width +1.60 mm (1/16 in) from 610 to under 1220 mm (24 – 48 in), +3.20 mm (⅛ in) at 1220 mm and over; length +6.35 mm (¼ in) up to 3 m (10 ft), +12.7 mm (½ in) from 3 to 6 m (10 – 20 ft); no minus tolerance.
  • Hot-rolled sheet: width +15.88 – 20.64 mm (⅝ – 13/16 in) and length +19.05 – 38.10 mm (¾ – 1½ in) by length and width, no minus tolerance; flatness 19.05 – 57.15 mm (¾ – 2¼ in) by width or length.
  • Weight: a single item of cold-rolled sheet may exceed the estimated weight by 10 % (five sheets or fewer, or up to 91 kg / 200 lb) or 7½ % (larger items); hot-rolled sheet by 20 %; strip by 10 %. There is no minus weight tolerance; the minus thickness tolerance governs.

For copper-nickel and zirconium sheet and strip, tolerances are confirmed on enquiry.

Manufacturing and inspection

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