EN_US-Engineering-Product-Cold-rolled-All Grades Surface aspectsTSE
Surface aspects
Surface quality according to ASTM A1008: 2013 and ASTM A568: 2011.
Surface quality class 1 (exposed):
The better side must be free of defects that can spoil the uniform appearance of a high-quality paint or of an electrolytic coating. The other side must at least conform to surface quality unexposed.
Surface quality class 2 (unexposed):
Defects that do not influence the formability or the application of surface coatings are permitted. These are defects such as pores, minor scratches, slight indentations, small grooves or slight discolouration.
Inspected side
As a rule, the upper side of the strip is inspected; on request, the strip can be wound so that the inspected side is the underside.
Surface texture/roughness
Cold-rolled annealed and skin passed steel is available in several surface textures. All textures are available.
Unless specified otherwise, Tata Steel will supply ‘Regular matte’.
Description | Roughness µinch CLA |
---|---|
Commercial bright | ≤ 10 |
H - dull | ≤ 16 |
Light matte | ≤ 36 |
Regular matte | 24 - 76 |
Rough matte | 50 - 100 |
Preservative oil
The standard oil applied by Tata Steel acts as a protective coating. Other types of oil may be available to meet your requirement.
Tata Steel offers a range of oiling levels:
Lightly oiled: 55 mg/ft2 per side
Regular oiled: 110 mg/ft2 per side
Other oiling levels are available on request. Tata Steel is not responsible for the risk of corrosion during storage or shipment if material is ordered in the unoiled condition.
Surface cleanliness
Tata Steel can guarantee improved surface cleanliness on request for batch annealed products. The cleanliness is tested with a tape test, in which the loss of reflection is measured. The reflection gives an indication of the oil residue on the annealed product.
Two levels of loss of reflectivity are available for batch annealed products: a maximum of 20% or a maximum of 30%. Continuously annealed products typically exhibit a loss of reflection up to around 10%.
EN_US-Engineering-Product-Cold-Rolled-Structural steel-SS Grade 30-Properties TSE
Properties
Mechanical properties
Cold-rolled structural steel has the following mechanical properties (skin passed) - these are typically measured longitudinal to the rolling direction:
ASTM A 1008: 2013 | Grade | SS Grade 30 | |
---|---|---|---|
Min. yield | strength | ksi | 30 |
Min. tensile | strength | ksi | 45 |
Min. elongation | 2 inch | % | 24 |
Chemical composition
Heat analysis with maximum values in weight percentages:
ASTM A 1008: 2013 | Grade | SS Grade 30 |
---|---|---|
C | Max. | 0.2 |
Mn | Max. | 0.6 |
P | Max. | 0.035 |
S | Max. | 0.035 |
Cr | Max. | 0.15 |
Ni | Max. | 0.2 |
Mo | Max. | 0.06 |
V | Max. | 0.008 |
Cb | Max. | 0.008 |
Ti | Max. | 0.025 |
EN_US-Engineering-Product-Cold-Rolled-Structural steel-SS Grade 30-Dimensions TSE
Dimensions
For continuously annealed (CA) products.
Dimensions in inches.
From - up to | SS Grade 30 |
---|---|
0.015 - 0.016 | - |
0.016 - 0.017 | 52 |
0.017 - 0.020 | 55 |
0.020 - 0.026 | 60 |
0.026 - 0.028 | 68 |
0.028 - 0.030 | 68 |
0.030 - 0.039 | 68 |
0.039 - 0.063 | 71 |
0.063 - 0.071 | 57 |
0.071 - 0.079 | 57 |
Minimum width is 36 inch.
Tolerances on thickness
Tolerances comply with standard ASTM A 568: 2011 - excluding 1 inch minimum edge distance.
Tighter tolerances are available, please contact us.
EN_US-Engineering-Product-Cold-rolled-All grades Shape and dimensional tolerancesTSE
Shape and dimensional tolerances
Tolerances on thickness
Tata Steel can supply to full thickness tolerance specified in ASTM A568: 2015 / A635: 2015.
Thickness tolerances over, no tolerance under. Tighter tolerances are available as shown below:
Carbon Steel | Thickness tolerances available | ||||
---|---|---|---|---|---|
ASTM A 568 (2015) / A635 (2015) | |||||
20 - 40 | 40 - 48 | 48 - 60 | 60 - 72 | >72 | |
0.031 - 0.051 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 |
0.051 - 0.057 | 0.01 | 0.012 | 0.012 | 0.014 | 0.014 |
0.057 - 0.071 | 0.012 | 0.012 | 0.014 | 0.014 | 0.014 |
0.071 - 0.098 | 0.014 | 0.014 | 0.014 | 0.016 | 0.016 |
0.098 - 0.179 | 0.014 | 0.016 | 0.016 | 0.016 | 0.016 |
0.179 - 0.229 | 0.016 | 0.018 | 0.02 | 0.022 | 0.024 |
0.229 - 0.313 | 0.022 | 0.024 | 0.024 | 0.026 | 0.03 |
0.313 - 0.375 | 0.024 | 0.026 | 0.028 | 0.03 | 0.032 |
0.375 - 0.500 | 0.028 | 0.028 | 0.03 | 0.032 | 0.036 |
0.500 - 0.625 | 0.03 | 0.03 | 0.032 | 0.036 | 0.038 |
0.625 - 1.000 | 0.032 | 0.032 | 0.034 | 0.038 | 0.04 |
HSLA | Thickness tolerances available | ||||||
---|---|---|---|---|---|---|---|
ASTM A568 (2007) / A635 (2007) | |||||||
20 - 32 | 32 - 40 | 40 - 48 | 48 - 60 | 60 - 72 | 72 - 80 | > 80 | |
0.031 - 0.051 | 0.012 | 0.012 | 0.012 | 0.012 | 0.012 | 0.012 | 0.012 |
0.051 - 0.059 | 0.012 | 0.012 | 0.014 | 0.014 | 0.014 | 0.014 | 0.014 |
0.059 - 0.070 | 0.014 | 0.014 | 0.014 | 0.014 | 0.016 | 0.016 | 0.016 |
0.070 - 0.082 | 0.014 | 0.014 | 0.014 | 0.014 | 0.016 | 0.016 | 0.016 |
0.082 - 0.098 | 0.014 | 0.016 | 0.116 | 0.016 | 0.018 | 0.018 | 0.02 |
0.098 - 0.179 | 0.016 | 0.016 | 0.02 | 0.02 | 0.022 | 0.024 | 0.024 |
0.179 - 0.229 | 0.018 | 0.018 | 0.02 | 0.02 | 0.022 | 0.024 | 0.024 |
0.229 - 0.313 | 0.022 | 0.022 | 0.024 | 0.024 | 0.026 | 0.03 | 0.03 |
0.313 - 0.375 | 0.024 | 0.024 | 0.026 | 0.028 | 0.03 | 0.032 | 0.032 |
0.375 - 0.500 | 0.028 | 0.028 | 0.028 | 0.03 | 0.032 | 0.036 | 0.036 |
0.500 - 0.625 | 0.03 | 0.03 | 0.03 | 0.032 | 0.036 | 0.038 | 0.038 |
0.625 - 1.000 | 0.032 | 0.032 | 0.032 | 0.034 | 0.038 | 0.04 | 0.04 |
Option for maximum crown values
At the time of ordering, specific agreements can be made on the crown of hot-rolled strip.
Tolerances on width, edge camber and flatness
Material will be supplied conforming to the tolerances specified in ASTM A568 (2007) / A635 (2007).
Width tolerances are over, no tolerance under.
Width tolerances available | ||
---|---|---|
Carbon steel | ASTM A568: 2015 / A635: 2015 | |
Mill edge | Cut edge | |
24 - 26 | 0.812 | 0.125 |
26 - 28 | 0.937 | 0.125 |
28 - 30 | 0.937 | 0.125 |
30 - 35 | 1.125 | 0.187 |
35 - 48 | 1.125 | 0.187 |
48 - 50 | 1.125 | 0.25 |
50 - 60 | 1.5 | 0.25 |
60 - 65 | 1.5 | 0.312 |
65 - 70 | 1.5 | 0.312 |
70 - 78 | 1.5 | 0.312 |
78 - 80 | 1.875 | 0.312 |
80 - 82 | 1.875 | 0.375 |
Width tolerances available | ||
---|---|---|
HSLA | ASTM A568: 2007 / A635: 2007 | |
Mill edge | Cut edge | |
24 - 26 | 0.812 | 0.125 |
26 - 28 | 0.937 | 0.125 |
28 - 30 | 1.125 | 0.125 |
30 - 35 | 1.125 | 0.187 |
35 - 48 | 1.25 | 0.187 |
48 - 50 | 1.25 | 0.25 |
50 - 60 | 1.5 | 0.25 |
60 - 65 | 1.625 | 0.312 |
65 - 70 | 1.75 | 0.312 |
70 - 78 | 1.875 | 0.312 |
78 - 80 | 2 | 0.375 |
80 - 82 | 1.875 | 0.375 |
Dimensions and coil weights
Tata Steel can supply hot-rolled steels with the following minimum and maximum dimensions and weights.
Description | Capability |
---|---|
Coil diameter inner non-pickled | 30 inch |
Coil diameter inner pickled | 24 inch standard |
30 inch on request | |
Tolerance on inner diameter | +0/-2 inch |
Coil diameter outer non-pickled | Outer diameter available is 10/7 x width to reduce possibility of coil tipping over |
Max. 86 inch | |
Min. 41.5 inch | |
Coil diameter outer pickled and oiled | Outer diameter available is 10/7 x width to reduce possibility of coil tipping over |
Max. 86 inch | |
Min. 65 inch | |
Coil weight | Max. 75,000 lbs |
Maximum coil weight limits can vary due to | |
transport limits and outer coil diameter | |
Some HR products may have different coil weight ranges | |
PIW width ≤ 47 inch | 868 - 1288 PIW width |
PIW 47 inch < width ≤ 67 inch | 868 - 1215 PIW width |
PIW width > 67 inch | 616 PIW width and 868 - 1215 PIW width |
Minimum tonnage per order | Refer to price list for order quantity details |
Minimum order quantities may apply |