1. POSCO Standard (1993)

Cold Rolled Sheet and Coil

Structural Cold-Rolled Sheet (1993)

Classification Thickness (mm) Specification Chemical Composition (%) Thickness (kgf/m²) Tensile Strength (kgf/m²) Elongation Rate (%) Bending Tes (Inner Diameter/Thickness) C Mn P S Class 1  0.4 - 3.0 CSP 30 0.20 and under 0.60 and under 0.04 and under 0.04 and under 18 and over 30 and over 26 and over Closed Class 2  CSP 32 22 and over 32 and over 24 and over 1.0 Class 3  CSP 34 24 and over 34 and over 22 and over 1.5 Class 4  A *CSP 37 0.20 and under 0.90 and under 0.04 and under 0.04 and under 28 and over 37 and over 20 and over 2.0 B *CSP 37P 0.15 and under 0.60 and under 0.20 and under 0.04 and under Class 5  *CSP 58 0.20 and under 0.60 and under 0.04and under  0.04 and under 56 and over 58 and over - - Remark: : 1. Cu, which is 0.02% and over, can be added upon customer request. 2. Tensile test piece: No. 5 3. Specifications with "*" require prior consultation before ordering.

Cold Rolled Steel for Porcelain Enameling (1993)

Classification Thickness (mm) Specification Chemical Composition (%) Elongation (Min.)(%) Test Piece Bending Test C Mn P S 0.40-0.60 0.60-1.00 1.00-1.60 1.60-2.00 2.00-2.30 Inner Diameter/Thickness Test Piece Two Firing Commercial 0.2 - 1.6 CESP 2-C 0.08 and under 0.50 and under 0.030 and under 0.030 and under 34 36 37 38 39 No.5 in rolling direction Closed No. 5 rolling direction Two Firing Drawing 0.4 - 2.3 CESP 1-S 0.008 and under 0.50 and under 0.030 and under 0.030 and under 35 37 38 39 - Two Firing Deep Drawing 0.4 - 2.3 SPP 0.008 and under 0.50 and under 0.030 and under 0.030 and under 36 38 39 40 - Remark : : 1. Carbon can register 0.012% or less when such elements as Ti, Nb, Zr, V and B are added. 2.Tension test will be omitted in general for steel sheets thinner than 0.6mm. 3.Before ordering CESP 2-C and CESP 2-D, prior consultation is needed.

High Strength Steel Sheet (1993)

Classification Thickness (mm) Specification Manufacturing Method Tensile Strength (kgf/m²ÿ) Yield Point (kgf/m²) Elongation (Min.)(%) Bending Test (Inner Dia./Thickness) 0.4-0.6 0.6-1.0 1.0-1.6 1.6-2.0 2.0-2.3 Commercial Quality 0.4 and over 2.3 and under  CHSP 45C 45 and over 28 and over 24 26 27 28 29 Closed CHSP 60C 60 and over 36 and over 15 17 18 18 19 1.0 Drawing CHSP 35R 35 and over 19 and over 32 34 35 36 38 Closed CHSP 40R 40 and over 23 and over 29 31 32 33 35 Closed *CHSP 45R 45 and over 27 and over 27 29 30 30 31 Closed Deep Drawing CHSP 35E 35 and over 17 and over 32 34 35 36 37 Closed CHSP 40E 38 and over 21 and over 30 32 33 34 35 Closed CHSP 45E 44 and over 24 and over 32 33 34 35 36 Closed Low Yield Ratio *CHSP 60DP Dual Phase Strengthening 60 and over 42 and under  19 21 22 22 - 1.0 Transformation Induced Plasticity CHSP 80TR Transformation Induced Plasticity 80 and over 60 and under  - - 16 16 16 3.0 Bake Hardening *CHSP 35EB Solid Solution & Precipitation Strengthening 35 and over - 32 34 35 36 38 Closed Remark: : 1.The forms of CHSP 35E and CHSP 40E with stricter surface quality are CHSP 35E-E and CHSP 40E. 2.Chemical composition is subject to agreement between manufacturer and customer. 3.If not specified, surface finishing will be treated in dull finishing. 4.Specifications with "*" require prior consultation.

2. KS Standard

KS D 3512(1986) Cold-Rolling Sheet and Coil

Type Specification Temper Chemical Composition (%) Symbol Tensile Strength kgf/mm² (N/mm²) Elongation (Min.)(%) Hardness Bending Test (Inside Dia./Thickness) C Si Mn P S 0.25 and over, Under 0.40  0.40 and over, Under 0.60  0.6 and over, Under 1.0  1.0 and over, Under 1.6  0.6 and over, Under 2.5  2.5 and over HRB HV Class 1  SCP 1 (Commercial Quality) As Annealed Normal Refining 0.12 and under * - 0.50 and under * 0.040and under  * 0.045and under  * A S (28 and over) (32) (34) (36) (37) (38) (39) 57 and under * 67 and under * 105 and under * 115 and under * Closed 1/8 hardening *1/4 hardening *1/2 hardening Full Hard 1/8H 1/4H 1/2H H 30-42* (294-412) 38-50* (373-490) 45-60* (441-588) 56and over* (549and over) 25 and over in all thickness   10 and over in all thickness - - 50 - 71 65 - 80 74 - 89 85 and over 95 - 130 115 - 150 135 - 185 170and over Closed 0.5 1.0 - Class 2  SCP 2 (Commercial Quality) As Annealed Normal Refining 0.10and under  * - 0.45and under  * 0.035 and under * 0.035 and under * A S 28and over (275and over) 34 36 38 39 40 41 57 and under * 65and under  * 105 and under * 115 and under * Closed Class 3  SCP 3 (Commercial Quality) As Annealed Normal Refining 0.08 and under * - 0.40 and under * 0.030 and under * 0.030 and under * A S 28and over (275and over) 36 38 40 41 42 43 57 and under * 65 and under * 105 and under * 115 and under * Closed Remarks 1.Specifications with '*' are only for reference. 2.Generally, tension test as well as elongation are not applied to the steels in Class 1. However, if specified by customer, the values in parentheses can be applied. 3. Tension test and elongation are applied to steel wider than 30mm. 4. In principle, tension test may be omitted for steel thinner than 0.6mm. 5. When the normal refining steels in Class 3 are specified as "non-aging", they will have a six-month "non-aging" guarantee after shipment. 6.Specifications with '*' require prior consultation. 7.The Erichsen values of annealed and normal refining steels in Class 1 to 3 are as follows.

(Unit : mm) Class / Thickness 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.2 1.4 1.6 CSP 1 7.2 7.8 8.4 8.8 9.1 9.4 9.6 10.0 10.3 10.5 CSP 1D 7.6 8.2 8.8 9.2 9.5 9.8 10.0 10.4 10.7 10.9 CSP 2 8.0 8.6 9.2 9.6 9.9 10.2 10.4 10.8 11.1 11.3

3. JIS Standard

JIS G 3135(1991) Cold Rolled Steel for Automotive Use

Classification Specification Thickness (mm) Yield Point N/mm² (kgf/mm²) Tensile Strength N/mm² (kgf/mm²) Elongation (Min.)(%) Test Piece Bending Test 0.6 and over, under 1.0  1.0 and over, 2.3 and under  Bending Angle Inner Dia./Thickness Test Piece Deep Drawing SPFC 340 0.6 and over 2.3 and under  175 and over (18 and over) 340 and over (35 and over) 34 35  Perpendicular to No. JIS 5 in rolling direction 180° Closed No. JIS 3 in rolling direction SPFC 370 205 and over (21 and over) 370 and over (38 and over) 32 33 Drawing SPFC 390 0.6 and over 2.3 and under  235 and over (24 and over) 390 and over (40 and over) 30 31 Closed SPFC 440 265 and over (27and over ) 440 and over (45and over ) 26 27 *SPFC 490 295 and over (30 and over) 490 and over (50 and over) 23 24 *SPFC 540 325 and over (33and over ) 540 and over (55 and over) 20 21 0.5 SPFC 590 355 and over (36and over ) 590 and over (60 and over) 17 18 1.0 Low Yield Ratio SPFC 490Y 0.6 and over 1.6 and under  225 and over (23 and over) 490and over (50and over ) 24 25 Closed SPFC 540Y 245 and over (25and over ) 540 and over (55and over ) 21 22 0.5 *SPFC 590Y 265 and over (27 and over) 590 and over (60and over ) 18 19 1.0 *SPFC 780Y 0.8 and over  1.4 and under  365 and over (37 and over ) 780 and over (80 and over) 13 14 3.0 *SPFC 980Y 490 and over (50and over ) 980 and over (100and over ) 6 7 4.0 Bake Hardening *SPFC 340H 0.6  and over 1.6 and under  185 and over (19and over ) 340 and over (35 and over) 34 35 Closed Remark : 1.The number of tests: For cold-rolling, there will be one test per coil. However when the steel weigh under 3 tons, the test shall be conducted when the thickness, rolling conditions and heat treatment conditions are all the same.

JIS G 3133(1998) Cold-Rolled Steel for Porcelain Enameling

Specification Chemical Composition (%) Elongation (Min.)(%) Test Piece Erichsen Value (Min.) (mm) Bending Test Classified by Thickness(mm) C Mn P S 0.4 and over under 0.6  0.6 and over under 1.0  1.0 and over under 1.6  1.6 and over 2.0 and under  0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.2 1.4 1.6 Inner Diameter Test Piece SPP 0.008 and under  0.50and under   0.040 and under  0.040and under     38 39 40 No.JIS 5 in rolling direction 7.6 8.2 8.8 9.2 9.5 9.8 10.0 10.4 10.7 10.9 Closed No. JIS 3 in rolling direction Remark : 1.Manufacturing method : cold-rolling and decarburization treatment 2.Chemical composition : "C" shall be specified when requested by customers in product analysis. 3.Only the steel with the carbon content of under 0.012% can have Ti, Nb, Zr, V and B added. 4.For steel less than 0.6mm in thickness, tension test will generally be omitted.

JIS G 3141(1987) Cold-Rolled Steel Coil and Sheet

Classification Specification Temper Chemical Composition(%) Tensile Strength kgf/mm² (N/mm²) Elongation (Min.)(%) Hardness Bending Test (Inner Dia./Thickness) C Si Mn P S 0.25and over  under 0.40  0.40 and over under 0.60 0.6and over  under 1.0  1.0 and over under 1.6  0.6 and over under 2.5  2.5and over  HRB HV Commercial Quality Class 1 SPCC As annealed Normal Refining 0.12 and under * - 0.50 and under * 0.40 and under * 0.45 and under * (270 and over) (32) (34) (36) (37) (38) (39) 57 and under * 67 and under * 105 and under * 115 and under * Closed 1/8 hardening -  25 and over in all thicknesses  50 - 71 95 - 130 Closed *1/4 hardening  10 and over in all thicknesses 65 - 80 115 - 150 0.5 *1/2 hardening - 74 - 89 135 - 185 1.0 Full hard - 85 and over 170and over - Drawing Class 2 SPCD As annealed Normal Refining 0.10 and under * - 0.45 and under * 0.35 and under * 0.35 and under * 270 and over 34 36 38 39 40 41 57 and under * 65 and under * 105 and under * 115 and under * Closed Deep Drawing Class 3 SPCE As annealed Normal Refining 0.08 and under * - 0.40 and under * 0.30 and under * 0.30 and under * 270 and over 36 38 40 41 42 43 57 and under * 65 and under * 105 and under * 115 and under *         Closed Remarks : 1. In principle, the values of tension test are not applied to Class 1 steels, both in annealed and normal refining states. However, when either one or both of the tension test value and Erichson value is guaranteed by designation, add a "T" at the end of the code like SPCCT. In such cases, values in parentheses will be applied. 2. The values with "*"are only for reference 3. When non-aging is guaranteed by designation, normally refined steel in Class 3 will have an "N" at the end of the specification code. 4. Tension test and elongation rate are applied to steel wider than 30mm. 5. For steels thinner than 0.6mm, the tension test is omitted in principle. 6. When normally refined steels in Class 3 are specified as "non-aging", they will have a six-month guarantee period after shipment. 7. The Erichen values of steels in Class 1 to 3 in annealed and normal refining states are as follows.

(Unit : mm) Class/Thickness 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.2 1.4 1.6 Class 1 7.2 7.8 8.4 8.8 9.1 9.4 9.6 10.0 10.3 10.5 Class 2 7.6 8.2 8.8 9.2 9.5 9.8 10.0 10.4 10.7 10.9 Class3 8.0 8.6 9.2 9.6 9.9 10.2 10.4 10.8 11.1 11.3

4. ASTM Standard

Specification Type Chemical Composition(%)                Test C Si Mn P S Cu ASTM A366-91 Commercial Quality Sheet Coil 0.15 and under  - 0.60 and under  0.035 and under  0.040 and under  If specified, 0.20 and over Closed in Bending ASTM A619-91 Drawing Quality Sheet Coil 0.10and under  - 0.50 and under 0.025 and under 0.035and under  - - ASTM A620-91 Specially Killed for  Drawing Sheet Coil 0.10 and under - 0.50and under  0.025and under  0.035and under  - - ASTM A424-92 Porcelain Enameling Type 1 0.008 and under - 0.40 and under - 0.020 and under - Closed in bending(L or C) Type 2 0.05 and under 0.50 and under 0.020 and under Type 3 0.02 and under 0.35 and under ASTM A611-91 Structural Cold-Rolled Steel Grade A 0.20 and under - 0.60 and under 0.045 and under 0.035 and under If specified, 0.20 and over Yield Point (Ksi) Tensile Strength (Ksi) Elongation (Min.)(%) Bending Grade B 25 and over 42 and over (Test Piece) 2inch or 50mm 26 1/2 C Type 1 0.20 and under 0.035 and under 30 and over 45 and over 24 1 Type 2 0.15 and under 0.020 and under 33 and over 48 and over 22 11/2 D Type 1 0.20 and under 0.90 and under 0.04 and under 40 and over 52 and over 20 2 Type 2 0.15 and under 0.60 and under 0.20 and under 80and over 82 and over - E 0.20 and under 0.60 and under 0.04 and under - Remarks : A366-91 : 1. General conditions are in accordance with A568 2. If not specified, hardness is under HRB60. 3. Prior consultation is required before ordering   A424-92 : 1. General conditions are in accordance with A568. 2. Type 1 : Open coiling Type 2 : Solution 3.Type 2 has an anti-sagging quality and B forming quality.   A619-91 : 1. Generally manufactured by rimmed steel. 2. General conditions are in accordance with A568.   A611-91 : 1. General conditions are in accordance with A568. 2. Type 1 : Open coiling 3. Type2 : Solution   A620-91 : 1. Manufactured by Al-killed steel. 2. General conditions are in accordance with A568.

5. DIN Standard

DIN 1623 Part 1(1983) Cold-Rolled Steel Sheet and Strip for Cold Forming

Specification Type of De-oxidation Chemical Composition(%) Yield Point (N/mm²) Tensile Strength (N/mm²) Minimum Elongation (%) Bending Test Hardness (Max.) C Si Mn P S N Lo=80mm HRB HRF HR30T St 12 - 0.10 and over - - - - 0.007 and under 280 and under 270 - 410 28 - 65 94 60 USt 13 U 0.10 and over 250 and under 270 - 370 32 57 90 55 RRSt 13 RR 0.10 and over - 240 and under 270 - 370 34 55 88 53 St 14 RR 0.08 and over 210 and under 270 - 350 38 50 86 50

DIN 1623 Part2(1986) Cold-Rolled Steel Sheet and Strip for General Engineering Purposes

Specification Type of De-oxidation Chemical Composition (%)   Yield Point (N/mm²) Tensile Strength (N/mm²) Elongation (Min.)(%) Bending Test Hardness (Max.) C Si Mn P S N Lo=80mm P S N St 37-2G - 0.17 and under - - 0.040 and under 0.035 and under 0.009 and under 215 and over 360 - 510 20 0.5 - - - USt 37-2G U 0.007 and under St 37-3G RR - St 44-3G RR 0.20 and under - - 0.040 and under 0.035 and under - 245 and over 430 - 580 18 1.0 - - - St 52-3G RR 325 and over 510 - 680 16 1.0 St 50-2G R 0.40 and under - - 0.050 and under 0.050 and under 0.009 and under 295 and over 490 - 660 14 - - - - St 60-2G R 0.40 and under 335 and over 590 - 770 10 St 70-2G R 0.65 and under 365 and over 690 - 900 6 Remarks : 1.U : Rimmed Steel, R: Killed Steel, RR: Specially Killed Steel 2.Prior consultation is required before ordering.

6. BS Standard

BS 1449 Part 1(1983) Carbon Steel Plates, Sheets and Strip

Classification Manufacturing Method Chemical Composition (%) Yield Point (N/mm²) Tensile Strength (N/mm²) Elongation (Min.)(%) Bending Test (Inner Dia./Thickness) C Si Mn P S Others Lo=80mm Lo=200mm Forming Quality Grade 1 Extra Deep Drawing CR1 Al Stabilized 0.08 and under  - 0.45 and under 0.025 and under 0.030 and under For corrosion resistance, Cu can be added upon negotiation 140 and over 280 and over 38 29 Closed Grade 2 Extra Deep Drawing   CR2 - 0.08 and under - 0.45 and under 0.030 and under 0.035 and under 140 and over 280 and over 36 27 Closed Grade 3 Extra Deep Drawing   CR3 - 0.10 and under - 0.50 and under 0.040 and under 0.040 and under (140 and over) (280 and over) (34) (25) Closed Grade 4 Extra Deep Drawing   CR4 - 0.12 and under - 0.60 and under 0.050 and under 0.050 and under  (140 and over) (280 and over ) - - Closed Strength Level Grade34/20 CR - 0.15 and under - 1.20 and under 0.050 and under  0.050 and under 200 and over 340 and over 29 21 2 Grade37/23 0.20 and under 230 and over 370 and over 28 20 Remarks : 1.CR : Cold Rolled 2.For CR3 and CR4, stabilized steel can be used upon negotiation. 3.Grade 3 and 4 generally do not require tension test.   The values within ( ) are for reference only. 4.As for Grade34/20 and 37/23, customers can select from rimmed, balanced or killed steel. 5.Prior consultation is required before ordering