CN Standards For Rolled Aluminium

Differences Between BS & CN Standards

For those familiar with the old BS1470 it is useful to highlight where the new CN standards differ:
Chemical Compositions – No Change.
Alloy Numbering System – No Change.
Temper Designations for Heat Treatable Alloys – A new wider range of special tempers having up to four digits after the T have been introduced for non- standard applications (e.g. T6151).
Temper Designations for Non Heat Treatable Alloys – No change to existing tempers but a more comprehensive definition of how tempers are achieved.
Mechanical Properties – Similar but not identical. Also, 0.2% Proof Stress must now be quoted on test certificates.
Thickness Tolerances – Considerably tighter for alloys
1050A & 3103. To reflect manufacturing difficulty the tolerances for alloys 5251, 5083 & 6082 are now wider than this, although still a little tighter than in BS1470.
Length and Width Tolerances – These tend to be tighter and are now all on the plus side (i.e. minus zero).
Flatness Tolerances – These are considerably tighter.

Alloy Groups

Please note that thickness tolerances for cold rolled material vary according to alloy, with the alloys falling into two groups as shown below.

Aluminium Alloy Groups

-                                        Alloy Group
-                                        Alloy Group I
-A, 1070A, 1050A, 1200
-, 3005, 3103, 3105
-, 4007
-, 5050
-A
-                                        Alloy Group II
-, 2017A, 2024
-, 5049, 8053, 5086, 5251, 5052, 5154A, 5454, 5754, 5182,
-, 6082
-, 7021, 7022, 7075

Thickness Tolerances

Please note that thickness tolerances for cold rolled material vary according to alloy, with the alloys falling into two groups as shown above.

The thickness tolerances also vary according to the width of the material as shown in the tables below.

Cold Rolled Sheet & Strip - Group I

Thickness (mm)	Tolerance (mm) +/-	Tolerance (mm) +/-	Tolerance (mm) +/-
	Group I 1000mm Wide	Group I 1250mm Wide	Group I 1500mm Wide
0.20 to 0.40	0.02	0.04	0.05
0.41 to 0.50	0.03	0.04	0.05
0.51 to 0.60	0.03	0.05	0.06
0.61 to 0.80	0.03	0.06	0.07
0.81 to 10.0	0.04	0.06	0.08
1.10 to 1.20	0.04	0.07	0.09
1.21 to 1.50	0.05	0.09	0.10
1.51 to 1.80	0.06	0.10	0.11
1.80 to 2.00	0.06	0.11	0.12
2.00 to 2.50	0.07	0.12	0.13
2.60 to 3.00	0.08	0.13	0.15
3.10 to 3.50	0.10	0.15	0.17

Cold Rolled Sheet & Strip - Group II

Thickness (mm)	Tolerance (mm) +/-	Tolerance (mm) +/-	Tolerance (mm) +/-
	Group II 1000mm Wide	Group II 1250mm Wide	Group II 1500mm Wide
0.20 to 0.40	0.03	0.05	0.06
0.41 to 0.50	0.03	0.05	0.06
0.51 to 0.60	0.04	0.06	0.07
0.61 to 0.80	0.04	0.07	0.08
0.81 to 1.00	0.05	0.08	0.09
1.10 to 1.20	0.05	0.09	0.10
1.21 to 1.50	0.07	0.11	0.12
1.51 to 1.80	0.08	0.12	0.13
1.81 to 2.00	0.09	0.13	0.14
2.10 to 2.50	0.10	0.14	0.15
2.60 to 3.00	0.11	0.15	0.17
3.10 to 3.50	0.12	0.17	0.19

Cold Rolled Sheet & Strip - Group I/II

Thickness (mm)	Tolerance (mm) +/-	Tolerance (mm) +/-	Tolerance (mm) +/-
	Group I/II 1000mm Wide	Group I/II 1250mm Wide	Group I/II 1500mm Wide
3.60 to 4.00	0.15	0.20	0.22
4.10 to 5.00	0.18	0.22	0.24
5.10 to 6.00	0.20	0.24	0.25
6.10 to 8.00	0.24	0.30	0.31
8.10 to 10.0	0.27	0.33	0.36
10.1 to 12.0	0.32	0.38	0.40
12.1 to 15.0	0.36	0.42	0.43
15.1 to 20.0	0.38	0.44	0.46
21.0 to 25.0	0.40	0.46	0.48
26.0 to 30.0	0.45	0.50	0.53
31.0 to 40.0	0.50	0.55	0.58
41.0 to 50.0	0.55	0.60	0.63

Hot Rolled Plate

Thickness (mm)	Tolerance (mm) +/-	Tolerance (mm) +/-
	1250mm Wide	1500mm Wide
2.50 to 4.00	0.28	0.28
4.10 to 5.00	0.30	0.30
5.10 to 6.00	0.32	0.32
6.10 to 8.00	0.35	0.40
8.10 to 10.0	0.45	0.50
10.1 to 15.0	0.50	0.60
15.1 to 20.0	0.60	0.70
21.0 to 30.0	0.65	0.75
31.0 to 40.0	0.75	0.85
41.0 to 50.0	0.90	1.00
51.0 to 60.0	1.10	1.20
61.0 to 80.0	1.40	1.50
81.0 to 100	1.70	1.80
101 to 150	2.10	2.20
151 to 220	2.50	2.60
221 to 350	2.80	2.90
351 to 400	3.50	3.70

Length Tolerances

Thickness (mm)	Hot Rolled EN485-3 (-0mm) Plus:	Cold Rolled EN 485-4 (-0mm) Plus:
0.20 to 0.30	8.0mm	6.0mm
3.00 to 6.00	8.0mm	8.0mm
6.00 to 12.0	8.0mm	10.0mm
12.0 to 50.0	9.0mm	-
Over 50.0	9.0mm	-

Width Tolerances

Thickness (mm)	Hot Rolled EN485-3 (-0mm) Plus:	Cold Rolled EN 485-4 (-0mm) Plus:
0.20 to 3.00	-	3.0mm
3.10 to 6.00	7.0mm	4.0mm
6.10 to 12.0	7.0mm	5.0mm
12.1 to 50.0	8.0mm	-
51.0 to 200	8.0mm	-
201 to 400	11.0mm	-
	Applies to widths 1001mm to 2000mm	Applies to widths 501mm to 1250mm

Flatness Tolerances

Product	Thickness (mm)	Max Deviation over 2500mm Length	Max Deviation over 1250mm Width
Cold Rolled	0.50 to 3.00	10.0mm	5.00mm
	3.00 to 6.00	7.50mm	3.75mm
Hot Rolled	6.00 to 200	5.00mm	2.50mm

Sizga kerak bo'lgan mahsulotni qidiring

Xitoyda kuchli qayta ishlash zavodlari tomonidan qo'llab-quvvatlanadigan keng xizmat ko'rsatish markazlari tarmog'i.

Ommabop kalit so'zlar

Kategoriyalar

Hech qanday yozuv topilmadi

Barcha natijalarni ko'rish

Metalllar

Zanglamaydigan po'lat

Alyuminiy

Mis

Guruch

Alyuminiy bronza

Mis Nikel

Fosfor bronzasi va qo'rg'oshin bronzasi

Nikel qotishmalari

Maxsus po'latlar

Titan

Ishlov berish markazi

CNC marshrutizatsiyasi

Lazer bilan kesish

Ishlab chiqarish xizmatlari

Bobinni qirqish

Bosim idishi

Maxsus pardozlar

OGOHLANTIRISH

Ushbu ma'lumotlar faqat taxminiy ma'lumot bo'lib, to'liq spetsifikatsiya o'rniga unga tayanib bo'lmaydi. Xususan, mexanik xususiyatlarga qo'yiladigan talablar harorat, mahsulot va mahsulot o'lchamlariga qarab juda katta farq qiladi. Barcha ma'lumotlar bizning mavjud bilimlarimizga asoslangan va vijdonan taqdim etiladi. Kompaniya uchinchi tomon tomonidan unga tayanib ko'rilgan har qanday harakat uchun hech qanday javobgarlikni o'z zimmasiga olmaydi. Iltimos, yuqorida ko'rsatilgan "Ma'lumotlar jadvalini yangilash" sanasi ma'lumotlar jadvalining aniqligi yoki yangilanganligiga kafolat bermasligini unutmang.

Ushbu ma'lumotlar varag'ida keltirilgan ma'lumotlar turli xil tan olingan manbalardan, jumladan, EN standartlari, tan olingan sanoat ma'lumotnomalari (onlayn nashrda chop etilgan) va ishlab chiqaruvchilarning ma'lumotlaridan olingan. Ma'lumotlar ushbu manbalarning so'nggi sonidan olinganligi yoki ushbu manbalarning aniqligi haqida hech qanday kafolat berilmaydi. Kompaniya tomonidan taqdim etilgan materiallar ushbu ma'lumotlardan sezilarli darajada farq qilishi mumkin, ammo barcha tegishli va amaldagi standartlarga mos keladi. Batafsil ma'lumot berilgan mahsulotlar turli maqsadlar uchun ishlatilishi mumkinligi va Kompaniya ulardan foydalanish ustidan nazoratga ega emasligi sababli; Kompaniya qonun yoki boshqa yo'l bilan o'lchamlar, xususiyatlar va/yoki har qanday aniq maqsadga muvofiqligi, ifodalangan yoki nazarda tutilganligidan qat'i nazar, ifodalangan yoki nazarda tutilgan barcha shartlar yoki kafolatlarni istisno qiladi. Kompaniya tomonidan har qanday uchinchi shaxsga berilgan maslahatlar faqat o'sha tomonning yordami uchun va Kompaniya tomonidan javobgarliksiz beriladi. Barcha bitimlar Kompaniyaning amaldagi Sotuv Shartlariga bo'ysunadi. Kompaniyaning har qanday mijoz oldidagi majburiyatlari miqdori ushbu Shartlarda aniq ko'rsatilgan; uning nusxasi so'rov bo'yicha mavjud.