บริษัท เจ.เอส.วัฒนา จำกัด (มหาชน) ผลิตเหล็กข้ออ้อยมาตรฐาน มอก.24-2559 ขนาดเส้นผ่านศูนย์กลางตั้งแต่ 6 มม. ถึง 40 มม. ความยาว 10 และ 12 เมตร ชั้นคุณภาพ SD30, SD40 และ SD50
CHEMICAL COMPOSITION | |||||||
---|---|---|---|---|---|---|---|
GRADE | MAX. PERCENTAGE OF ELEMENT BY WEIGHT | ||||||
CARBON | MANGANESE | PHOSPHORUS | SULFUR | CARBON + MANGANESE / 6 | |||
CHEMICAL COMPOSITION | SD 30 | MAX. PERCENTAGE OF ELEMENT BY WEIGHT | 0.27 | - | 0.05 | 0.05 | 0.50 |
CHEMICAL COMPOSITION | SD 40 | MAX. PERCENTAGE OF ELEMENT BY WEIGHT | - | 1.80 | 0.05 | 0.05 | 0.55 |
CHEMICAL COMPOSITION | SD 50 | MAX. PERCENTAGE OF ELEMENT BY WEIGHT | - | 1.80 | 0.05 | 0.05 | 0.60 |
PHYSICAL PROPERTIES | |||||||
---|---|---|---|---|---|---|---|
GRADE | TENSILE STRENGTH MPA (KGF/SQ.MM) |
YIELD STRENGTH MPA (KGF/SQ.MM) |
% ELONGATION |
COLD BEND TEST | |||
BENDING ANGLE | DIAMETER OF MANDREL | ||||||
PHYSICAL PROPERTIES | SD 30 | 480 (49) | 295 (30) | 17 | COLD BEND TEST | 180 | 4 เท่า |
PHYSICAL PROPERTIES | SD 40 | 560 (57) | 390 (40) | 15 | COLD BEND TEST | 180 | 5 เท่า |
PHYSICAL PROPERTIES | SD 50 | 620 (63) | 490 (50) | 13 | COLD BEND TEST | 90 | 5 เท่า |
NOMINAL SIZES AND MASS | ||||
---|---|---|---|---|
SIZE DESIGNATION | DIAMETER (MM.) | CROSS SECTION AREA (SQ.MM.) | MASS (KG/M) | |
NOMINAL SIZES AND MASS | DB 6 | 6 | 28.3 | 0.222 |
NOMINAL SIZES AND MASS | DB 8 | 8 | 50.3 | 0.395 |
NOMINAL SIZES AND MASS | DB 10 | 10 | 78.5 | 0.616 |
NOMINAL SIZES AND MASS | DB 12 | 12 | 113.1 | 0.888 |
NOMINAL SIZES AND MASS | DB 16 | 16 | 201.1 | 1.578 |
NOMINAL SIZES AND MASS | DB 20 | 20 | 314.2 | 2.466 |
NOMINAL SIZES AND MASS | DB 22 | 22 | 380.1 | 2.984 |
NOMINAL SIZES AND MASS | DB 25 | 25 | 490.9 | 3.853 |
NOMINAL SIZES AND MASS | DB 28 | 28 | 615.8 | 4.834 |
NOMINAL SIZES AND MASS | DB 32 | 32 | 804.2 | 6.313 |
NOMINAL SIZES AND MASS | DB 36 | 36 | 1,017.9 | 7.990 |
NOMINAL SIZES AND MASS | DB 40 | 40 | 1,256.6 | 9.865 |