The POSCO Quality

Hot Rolled Steel

Hot rolled steel products are divided into two groups: hot rolled coils produced through hot rolling and hot rolled steel plates, which are made by cutting material from hot rolled coils. Slabs produced from a continuous casting system are rolled, cooled and coiled into the sizes required by the customers.

Product Specification

This product specification is subject to change, so please check the latest specifications when ordering or consult with the person in charge.

Hot Rolled Steel Sheets & Strips for Deep Drawing

기호,적용두께,화학성분 등의 상세 규격
Designation Thickness
(mm)		 Chemical Composition(wt.%)
C Si Mn P S Sol-Al 기타
POSHRD2 1.8~7.0 ~0.03 ~0.03 ~0.25 ~0.02 ~0.02 ~0.06 -
POSHRD2 2.0~7.0 ~0.005 ~0.03 ~0.20 ~0.02 ~0.02 ~0.06 Ti 0.005~0.05
Nb 0.005~0.04
POSHRD3 2.0~7.0 ~0.005 ~0.03 ~0.20 ~0.02 ~0.02 ~0.06 Ti 0.01~0.06
Note)
  • 1. SAE applies to the appearance, shape, dimension, weight and their tolerances.
  • 2. These specifications guarantee chemical composition, but not mechanical properties.

Sulfuric Acid Resistant Steel and Plates & Strips Resistant to Weathering

기호, 적용두께, 화학성분 등의 상세 규격
Designation Thickness
(mm)		 Chemical Composition(wt.%)
C Si Mn P S Others
ANCOR-H 1.8~7.0 ~0.10 ~0.50 ~1.70 ~0.035 ~0.035 Cu ~0.50
Cr ~0.50
HICON700W 2.3~6.5 ~0.12 ~0.45 ~2.50 ~0.035 ~0.01 Cu ~0.55
Cr ~1.20
기호, 항복점, 인장강도, 연신율, 굴곡시험 등 상세규격
Designation Yield Point
(MPa)		 Tensile Strength
(MPa)		 Elongation Bending Test
Test Piece % Bending Angle Inner Diameter Test Piece/Direction
ANCOR-H 245~ 400~ No.5 Rolling Direction 25 180° 1.5t JIS No.1/
Traverse
HICON700W 700~ 750~950 No.5 Rolling Direction 12 90° 1.0t JIS No.5/
Traverse
Note)
  • 1. JIS G 3193 (ANCOR -H) and JIS G 3134 (HICON 700W) apply to the appearance, shape, dimension, weight and their tolerances.
  • 2. Number of tensile testing pieces and bending testing pieces: One for all products of the same type and same thickness. Two if a product is heavier than 50 tons.

Hot Rolled Steel Sheets & Strips for Car Structures

기호, 적용두께, 화학성분 등의 상세 규격
Designation Thickness
(mm)		 Chemical Composition(wt.%)
C Si Mn P S Nb
ATOS540(ATOS55) 2.3~12.7 ~0.20 ~0.40 ~1.50 ~0.03 ~0.03 Added
ATOS590(ATOS60) 2.3~12.7 ~0.20 ~0.40 ~1.50 ~0.03 ~0.03
ATOS780(ATOS80) 2.3~14 ~0.20 ~0.40 ~2.00 ~0.03 ~0.03
ATOS980(ATOS100) 4~8.0 ~0.20 ~0.40 ~2.00 ~0.03 ~0.03
기호, 인장시험, 굴곡시험 등 상세 규격
Designation Tensile Test Bending Test
Tensile Strength
(MPa)		 Yield Point
(MPa)		 Elongation(%), Thickness(mm) *Rolling Bending Strength Inner Diameter Test Piece
(JIS No.3)
No.5 Test Piece
2.5-5.0		 No.5 Test Piece
5.0-6.3		 No.1A Test Piece
6.3-12.7
ATOS540(ATOS55) 540~ 340~ 20~ 21~ 14~ 180° 1.5t Traverse
ATOS590(ATOS60) 590~ 420~ 19~ 20~ 13~ 180° 1.5t Traverse
ATOS780(ATOS80) 780~ 700~ 14~ 14~ 9~ 180° 1.5t Traverse
ATOS980(ATOS100) 980 880 8~ (No.5 test piece applied) 90° 3.0t Traverse
Note)
  • 1. JIS G 3134 applies to the appearance, shape, dimension, weight and their tolerances.
  • 2. Number of tensile testing pieces and bending testing pieces: One for all products of the same type and same thickness. Two if a product is heavier than 50 tons.
  • 3. Bending test piece JIS No.3 to be perpendicular to the rolling direction.
  • 4. Number of test pieces for ATOS100 tensile, impact and bending testing: One for each slab unit used for tensile testing. One for all products of the same charge and same thickness for impact testing. One for all products of the same charge and same thickness for bending testing, but two if a product is heavier than 50 tons.

Hot Rolled Plates and Strips for Car Impact Beams and Stabilizers

기호, 적용두께, 화학성분 등의 상세 규격
Designation Thickness
(mm)		 Chemical Composition(wt.%)
C Si Mn P S Sol-Al Cr B
AUTOBEAM 1.6~7.0 ~0.30 - ~1.50 - ~0.005 ~0.12 0.10~0.30 -
STAB 1.6~7.0 ~0.30 ~0.25 ~1.00 ~0.025 ~0.015 ~0.10 0.20~0.40 0.001~0.005
기호, 인장시험, 굴곡시험 등 상세 규격
Designation Tensile Strength(MPa) Bending Test Note
Bending Angle Inner Diameter
AUTOBEAM 490~784 180° 1.5t Finished goods require the appropriate heat treatment to be complete
Note)
  • 1. KS D 3555 (AUTOBEAM) and JIS G 3193 (STAB) apply to the surface, shape, dimension, weight and their tolerances.
  • 2. Number of tensile testing pieces and bending testing pieces: One for all products of the same type and same thickness. Two if a product is heavier than 50 tons.
  • 3. Bending test piece JIS No.3 to be in parallel with the rolling direction.