In order to meet the Tarim Oil Field 's demand for high toughness drill pipes, Baosteel has trial-produced ultra-low sulfur and phosphorus steel for drill pipes.
为了满足塔里木油田对高韧性钻杆的需求，宝钢试制超低硫低磷钻杆用钢。
2
Because of containing more sulfur and phosphorus in the steel, and more carbon, high hardness in material of surfacing welding, the pinch roller often turns up hot crack.
夹送辊堆焊时，由于母材的硫、磷含量较高及堆焊材料含碳量高、硬度大，常常产生热裂纹。
3
If there is more sulfur in the steel and the steel contains many inclusions with flake configuration in the same plane with high density, lamellar tearing tends to happen with high probability.