National Standard for Actual Thickness of 1.5mm Stainless Steel Sheet

1. What is the actual thickness of 1.5 thick stainless steel?

What is the actual thickness of the 1.5mm stainless steel plate?

I bought 1.5mm thick stainless steel sheet, but the actual measurement is only 1.3mm. Is this in line with the national standard?

The actual thickness of 304 stainless steel plate with nominal thickness of 1.5mm is generally less than 1.5mm.

What is the standard thickness of stainless steel 1.5?

According to our national standard, the positive and negative tolerance of 1.5mm thick stainless steel sheet should be within a certain range.

The difference between the standard thickness and the real thickness of stainless steel is that the standard thickness is generally greater than the real thickness.

The thickness difference between the real thickness and the standard thickness shall comply with the relevant standards.

National Standard for Actual Thickness of 1.5mm Stainless Steel Sheet 1

2. Allowable thickness deviation of 1.5 thick stainless steel plate

What is the national standard for thickness tolerance of 1.5mm stainless steel cold rolled sheet?

According to the national standard, the thickness shall comply with GBT3280-2015 Cold Rolled Stainless Steel Plate and Strip.

The actual thickness of 1.5 stainless steel shall comply with the following table:

Allowable thickness deviation of 1.5mm stainless steel plate

National standard Tolerance requirements (unit: mm)
Standard name Situation   PT.A PT.B
GB/T3280-2015 Cold Rolled Stainless Steel Plate and Strip Wide steel strip and rolled steel plate, longitudinal wide steel strip and rolled steel strip Width case <1250 1250~2100 600~<1000 1000~<1250 1250~2100
Tolerance ±0.12 ±0.15 ±0.07 ±0.08 ±0.10
Narrow steel strip and coiled steel strip   PT.A PT.B
Width case <125 125~<250 250~<600 <125 125~<250 250~<600
Tolerance ±0.035 ±0.04 ±0.045 ±0.03 ±0.035 ±0.04

Remarks:

1. The allowable thickness deviation shall comply with the provisions of general accuracy (PT. A).

If required by the demander and indicated in the contract, higher precision (PT. B) can be implemented.

2. For example, when 1.5mm thick stainless steel plate is 1219mm wide, the tolerance required for ordinary accuracy is 1.38-1.62mm, and that for higher accuracy is 1.42-1.58mm, that is, the minimum thickness of 1.5 * 1219mm stainless steel plate shall reach 1.38mm.

3. Minimum thickness requirements of 1.5 thick stainless steel plate

According to the above table (national standard), for example:

The actual thickness of 1.5mm thick and 1000mm wide stainless steel sheet shall be ≥ 1.38mm:

1.5mm thick and 1219mm wide stainless steel sheet, the actual thickness should be ≥ 1.38mm;

1.5mm thick and 1500mm wide stainless steel sheet, the actual thickness should be ≥ 1.35mm;

1.5mm thick and 1800mm wide stainless steel sheet, the actual thickness should be ≥ 1.35mm;

The actual thickness of 1.5mm thick and 2000mm wide stainless steel sheet shall be ≥ 1.35mm.

It can be seen that when purchasing stainless steel sheets, it is stated that 1.5mm thick is to be purchased, but the actual measurement is only 1.3mm, which obviously does not conform to the national standard.

What is the actual thickness of the 1.5mm stainless steel plate and how much thickness must be reached before reaching the standard? I believe you have your own answer.

4. Provisions of other standards on 1.5mm thick stainless steel

Note: The actual thickness of the stainless steel plate should be determined according to the corresponding standard.

For example, according to Japanese standard J1SG4305:2012 Cold Rolled Stainless Steel Plate, Sheet and Strip (P14-15):

1.5mm stainless steel plate (wide steel strip and rolled steel plate, longitudinal wide steel strip and rolled steel strip) has only one precision, namely ± 0.12mm (when the width is less than 1250mm), ± 0.15mm (when the width is 1250-1600mm).

Therefore, according to the Japanese standard:

(1) The actual thickness of 1.5mm thick and 1000mm wide stainless steel plate shall not be less than 1.38mm;

(2) 1.5mm thick and 1219mm finished stainless steel plate, the actual thickness shall not be less than 1.38mm;

(3) The actual thickness of 1.5mm thick and 1500mm finished stainless steel plate shall not be less than 1.35mm (the same as the national standard GB/T3280-2015).

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