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Home > Conversion Chart > Packaging Steel Conversion Chart

HARDNESS COMPARISON
(Based on ASTM A623)
Designation	T-1	T-2	T-3	T-4	T-5	DR-8	DR-9
Aim Rockwell Range (30-T Scale)	46-52	50-56	54-60	58-64	62-68	73	76

TEMPER CLASSIFICATION
DR480	=	DR7
DR520	=	DR7 / DR8
DR550	=	DR8
DR580	=	DR8M / DR9
DR620	=	DR9
DR660	=	DR9M
DR690	=	DR10
TS245	=	T2.5
TH245	=	T57 OR T3
TS 260	=	T55 OR T3
TS275	=	T57 OR T3
TH370	=	T61 OR T4
TH415	=	T61 OR T4
TH435	=	T65 OR T5
TS480	=	T65 OR T5
TH520	=	DR520CA
TH550	=	DR550CA
TS550	=	DR550BA
TH580	=	DR580CA
TH620	=	DR620CA

TIN COATING WEIGHTS
(Based on ASTM A624)
Designation	lbs/BB	g/m²	Designation	lbs/BB	g/m²
10	0.05/0.05	1.1/1.1	50/25	0.25/0.125	5.6/2.8
20	0.10/0.10	2.2/2.2	75/25	0.375/0.125	8.4/2.8
25	0.125/0.125	2.8/2.8	75/50	0.375/0.25	8.4/5.6
35	0.175/0.175	3.9/3.9	100/25	0.50/0.125	11.2/2.8
50	0.25/0.25	5.6/5.6	100/50	0.50/0.25	11.2/5.6
75	0.375/0.375	8.4/8.4	100/75	0.50/0.375	11.2/8.4
100	0.50/0.50	11.2/11.2	135/25	0.675/0.125	15.2/2.8

FINISH
(Based on ASTM STANDARDS)
7B	BRIGHT
7C	STONE
5C	SILVER
5C /5D	MATTE

DECIMAL EQUIVALENTS
Fraction	Decimal	Millimeter
1/16	0.0625	1.5875
1/8	0.1250	3.1750
3/16	0.1875	4.7625
1/4	0.2500	6.3500
5/16	0.3125	7.9375
3/8	0.3750	9.5250
7/16	0.4375	11.1125
1/2	0.5000	12.7000
9/16	0.5625	14.2875
5/8	0.6250	15.8750
11/16	0.6875	17.4625
3/4	0.7500	19.0500
13/16	0.8125	20.6375
7/8	0.8750	22.2250
15/16	0.9375	23.8125
1	1.0000	25.4000

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