Tensile Strength Table of Plates for Rolling Machines and Classification of Steel Plates

Tensile Strength Table of Plates for Rolling Machines and Classification of Steel Plates:

I. Classification of Steel Plates (including strip steel):

1. Classification by thickness: (1) Thin plate (2) Medium plate (3) Thick plate (4) Extra-thick plate

2. Classification by production method: (1) Hot-rolled steel plate (2) Cold-rolled steel plate

3. Classification by surface characteristics: (1) Galvanized plate (hot-dip galvanized plate, electro-galvanized plate) (2) Tin-plated plate (3) Composite steel plate (4) Color-coated steel plate

4. Classification by application: (1) Bridge steel plate (2) Boiler steel plate (3) Shipbuilding steel plate (4) Armor steel plate (5) Automobile steel plate (6) Roofing steel plate (7) Structural steel plate (8) Electrical steel plate (silicon steel sheet) (9) Spring steel plate (10) Others

II. Common Japanese grades of steel plates for general and mechanical structures

1. In Japanese steel (JIS series) grades, ordinary structural steel is mainly composed of three parts: The first part indicates the material,

e.g., S (Steel) for steel, F (Ferrum) for iron; the second part indicates different shapes, types, and uses,

e.g., P (Plate) for plate, T (Tube) for tube, K (Kogu) for tool; the third part indicates characteristic numbers,

generally the minimum tensile strength. For example: SS400 – the first S indicates steel, the second S indicates "structure,"

400 is the lower limit tensile strength of 400 MPa, and the whole indicates ordinary structural steel with a tensile strength of 400 MPa.

2. SPHC – The first S is an abbreviation for steel, P for plate, H for heat, and C for commercial, and the whole indicates general-purpose hot-rolled steel plates and strips.

3. SPHD – Indicates hot-rolled steel plates and strips for stamping.

4. SPHE – Indicates hot-rolled steel sheet and strip for deep drawing.

5. SPCC – Indicates cold-rolled carbon steel sheet and strip for general use, equivalent to Chinese grade Q195-215A. The third letter C is an abbreviation for Cold. When tensile testing is required, add T to the end of the grade, resulting in SPCCT.

6. SPCD – Indicates cold-rolled carbon steel sheet and strip for stamping, equivalent to Chinese 08Al (13237) high-quality carbon structural steel.

7. SPCE – Indicates cold-rolled carbon steel sheet and strip for deep drawing, equivalent to Chinese 08Al (5213) deep drawing steel. When non-aging properties are required, add N to the end of the grade, resulting in SPCEN.

Temperature designations for cold-rolled carbon steel sheet and strip: Annealed state is A, standard temper is S, 1/8 hard is 8, 1/4 hard is 4, 1/2 hard is 2, and hard is 1. Surface finish designations: D for matte finish rolled steel and B for bright finish rolled steel. For example, SPCC-SD indicates standard tempered, matte finish rolled cold-rolled carbon sheet for general use.

Another example is SPCCT-SB, which indicates standard tempered, bright finish cold-rolled carbon sheet requiring guaranteed mechanical properties. 8. JIS designation method for steel grades for mechanical structures:

S + carbon content + letter designation (C, CK), where carbon content is represented by the median value multiplied by 100, and C indicates carbon, K indicates carburizing steel. For example, carbon steel coil S20C has a carbon content of 0.18-0.23%.