Product Standard Code

Standard	KS	ASTM	JIS	EN
Code	D 3614 SPTFS	A657	G 3315 SPTFS	10202

Coating Weight (unit : mg/m²)

Symbol	Metal Chrome	Oxide Chrome	Remark
Coating Range(m²)	≥30	≥5

Oil Weight (unit : mg/m²)

Symbol	Aim	Remark
D - 1	4.5	Printing, Lacquering

BP Standard Code

Standard	KS	ASTM	JIS	EN
Code	D 3516 SPB	A 625	SPB	10202

Classification

① Classification by Type of Steel

Type of Steel	Remark
MR (Medium Residual)	It contains few residual minor constituents and it is widely used for applications such as containers.
L (Low Metalloid Steel)	It contains particularly few residual minor constituents such as Cu, Ni, Cr, Mo, so that it is suitable for the materials of containers required improved corrosion resistance.
D (Drawing)	It is aluminum killed steel, so that it is suitable for the applications, which bear deep drawing, or other working that is liable to produce Luder’s lines pattern.

② Classification by Temper

The temper grade of SR(Single Reduced) BP(Black Plate) shall be expressed by the Rockwell superficial hardness values(HR30Tm)

Symbol		t ≤ 0.21mm	0.21mm < t ≤ 0.28mm	t > 0.28mm	Remark
T50	T1	≤53	≤52	≤51	Deep Drawing, Aerosol
T52	T2	53 ± 4	52 ± 4	51 ± 4	Battery case
T55	T2.5	56 ± 4	55 ± 4	54 ± 4	18L liquid
T57	T3	58 ± 4	57 ± 4	56 ± 4	General Can
T61	T4	62 ± 4	61 ± 4	60 ± 4	General Can, Crown
T65	T5	65 ± 4	65 ± 4	64 ± 4	Food Can Top/End

The hardness of less than 0.21mm in nominal thickness is normally tested using Rockwell 15T scale and results converted to Rockwell 30T scale.

- The temper grade of DR(Double Reduced) BP(Black Plate) shall be expressed by the Rockwell superficial hardness values(HR30Tm) or 0.2% average Yield Strength.

Symbol	Average Rockwell superficial hardness	0.2% average Yield Strength	Remark
DR450	68 ± 4	450 ± 70	Aerosol, Food beverage Can
DR520	72 ± 4	520 ± 70	Aerosol, Food beverage Can
DR550	73 ± 4	550 ± 70	Aerosol, Food beverage Can
DR580	74 ± 4	580 ± 70	DRD, Food beverage Can
DR620	76 ± 4	620 ± 70	DRD, Food beverage Can

③ Classification by Surface Finish

Product	Designation	Symbol		Remark	Aim (Ra/㎛)
		KS/JIS	TCC
SR	Bright Finish	B	BF	Blackplate finished to have a smooth surface with the use of temper-mill work rolls that have been ground to a low roughness	0.20~0.40
	Stone Finish	R	Rx	Blackplate finished to have a directional pattern with the use of final-mill work rolls that have been ground to a higher level of roughness than those used for the bright finish	0.38~0.58
	Silver Finish	S	D7	Blackplate finished to have a dull surface with the use of temper-mill work rolls with dull surface texture(Electrolytic tinplate with a luster finish provided by a flow-melted tin coating)	0.70~1.30
	Matt finish	M	D7	Blackplate finished to have a dull surface with the use of temper-mill work rolls with dull surface texture(Electrolytic tinplate with a luster finish provided by a flow-unmelted tin coating)	0.70~1.30
DR	Stone Finish	R	Rd	Blackplate finished to have a directional pattern with the use of final-mill work rolls that have been ground to a higher level of roughness than those used for the bright finish	0.25~0.45