Technical conditions for Caterpillar of 1E1006 (SHT 60)
1. Scope
The technical conditions apply to plates of 1E1006 with thickness not more than 100mm used for Caterpillar product.
2. Adopt standard:
WKZ566-2010 Standard Specification for High-Yield-Strength, Quenched and Tempered Alloy Steel Plate, Suitable for Welding
ASTM A6/A6M Standard Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling
ASTM A370 Standard Test Methods and Definitions for Mechanical Testing of Steel Products
3. Dimension, Shape, Weight and Permissible Deviation
The dimension, shape, weight and permissible deviation shall meet the requirements of ASTM A6/A6M.
Flatness: 4mm/m, waves of plate no more than 3 place per meter.
4. Technical conditions
4.1 Chemical composition (Ladle analysis)
The chemical composition of plates shall be accordance with the following table 1.
Table 1 Chemical composition (Ladle analysis)
C | Si | Mn | P | S | AL | Nb | V | Ti |
Max 0.20 | Max 0.55 | Max 1.60 | Max 0.025 | Max 0.035 | Min 0.020 | Max 0.05 | Max 0.15 | Max 0.05 |
Note: Per furnace analysis [Nb+V] not more than 0.15% [Nb] not more than 0.05%.
4.2 Steel making process: EAF+LF/VD, Aluminum fine-grain full killed steel.
4.3 Steel marking inside control rules shall be accordance with the following table 2.
Table 2 Chemical composition (Steel making control prescription)
Thickness mm | Element | C | Si | Mn | P | S | AL | Nb | V |
Standard | Max 0.20 | Max 0.55 | Max 1.60 | Max 0.025 | Max 0.035 | Min 0.020 | Max 0.05 | Max 0.15 | |
T<25 | Control | 0.16- 0.18 | 0.15- 0.25 | 1.50- 1.60 | Max 0.015 | Max 0.003 | 0.020- 0.040 | 0.030- 0.035 | 0.055- 0.060 |
Target | 0.17 | 0.20 | 1.55 | 0.010 | 0.002 | 0.032 | 0.057 | 0.030 | |
T>=25 | Control | 0.16- 0.18 | 0.35- 0.45 | 1.50- 1.60 | Max 0.015 | Max 0.003 | 0.030- 0.035 | 0.065- 0.070 | 0.020- 0.040 |
Target | 0.17 | 0.40 | 1.55 | 0.010 | 0.002 | 0.032 | 0.068 | 0.030 |
*When charging perform to control prescription stringent.
4.4 Mechanical properties
The mechanical properties of 1E1006 shall meet the requirement as table 3.
Table 3 Mechanical properties
Mechanical properties | |||
Yield strength MPa | Tensile strength MPa | Elongation % 50mm | Elongation % 200mm |
Min 465 | Min 560 | Min 17 | Min 15 |
4.5 Surface quality
The surface quality of plates shall be not bubble, scab, cracking, folded, entrainment, pockmark, Indentation oxide scale and etc surface defects.
4.6 Test method and inspection rules
Test items, sampling quantity, sampling method and test method shall conform to table 4.
Table 4 Test items for plates
Sampling | Test item | Quantity, Piece | Direction | Test menthod |
ASTM A6 | Tensile test | 1 (per rolled pc) | Transverse | ASTM A370 |
5. Package, marking and certificate
Package, marking and certificate shall conform to ASTM A6/A6M.
6. Delivery conditions
The delivery conditions for plates of 1E1006 shall be As rolled.
7. Other requirements
The other requirements for plates of 1E1006 shall be accordance with WKZ566-2010 additional.
MTC accordance with EN10204: 2004 3.1
