SA516Gr70 (60) is one of the six new products developed by Wugang in 2006. The steel plate meets the technical requirements of the metal stress resistant materials for sulfide stress cracking in NACE-MR0175 oilfield equipment and is tested by HIC+SSC. The steel plate is the first in China and internationally advanced. SA516G.70N meets the requirements of (ASME) ASTMA516/A516M standard, and satisfies the needs of high sulfur and hydrogen oil gas, reduces the corrosion of sulfur and hydrogen, reduces the overhaul of equipment and increases the service life of equipment. The plate has the characteristics: good anti impact performance, small deformation temperature, good welding performance, anti fatigue performance, lamellar tearing resistance, micro alloying, high purity, low carbon equivalent, sulfur hydrogen ability, products with good surface quality and dimensional tolerances, currently available for 200mm thickness the steel plates. Domestic requirements are generally SAGr70, SA516Gr60 less, because its performance is more common, domestic SA516Gr70, has now been widely used in major chemical sites.

1: SA516Gr70 applications

Carbon steel plate for middle and low temperature pressure vessel, ASME standard, developed and manufactured in Wugang in 2006. It differs from SA516Gr70 in tensile strength. The application of SA516Gr60/70 is widely used in petroleum, chemical industry, power plant, boiler, for the production of reactor, heat exchanger, separator, tank, gas tank, liquefied gas, nuclear reactor pressure vessel, boiler, liquefied petroleum gas cylinders, hydropower station high pressure pipes, turbine volute equipment and components.

Two: SA516Gr70 introduction

SA516Gr70 (60) is one of the six new products developed by Wugang in 2006. The steel plate meets the technical requirements of the metal stress resistant materials for sulfide stress cracking in NACE-MR0175 oilfield equipment and is tested by HIC+SSC. The steel plate is the first in China and internationally advanced. SA516G.70N meets the requirements of (ASME) A516/A516M standard, and satisfies the needs of high sulfur and hydrogen oil gas, reduces the corrosion of sulfur and hydrogen, reduces the overhaul of equipment and increases the service life of equipment. The plate has the characteristics: good anti impact performance, small deformation temperature, good welding performance, anti fatigue performance, lamellar tearing resistance, micro alloying, high purity, low carbon equivalent hydrogen sulfur resistant ability, products with good surface quality and dimensional tolerances, currently available for thickness below 200mm steel plate. Domestic requirements are generally SAGr70, SA516Gr60 less, because its performance is more common, domestic SA516Gr70, has now been widely used in major chemical sites.

Three: SA516Gr70 mechanical properties

SA516Gr70 tensile strength of 60 thousand pounds / square inch, that is, 413 cattle / square millimeter, that is, we usually mean more than 413, the main elements content is C, Mn, Si, P, s control determines its performance. Other trace elements are few and far between.

SA516Gr70 tensile strength of 70 thousand pounds / square meter, that is greater than 482.

Four: heat treatment

1. less than 40mm thickness steel plate to plate rolling state usually supply, can be eliminated by normalizing or normalizing and eliminate stress, or stress order.

2. thickness >40mm steel plate should be normalized.

3. unless otherwise specified by the buyer, the thickness of steel plate is less than or equal to 40mm, when the notch toughness requirements, should be normalized.

4. if approved by the purchaser, use a cooling rate greater than that in air to improve toughness, but the plate shall then be tempered at a temperature of 1100-1300 degrees (595-705 DEG C).

5.SA516Gr70 belongs to the medium and low temperature pressure vessel with carbon steel plate, and the national standard material is different, basically not on, there is need to see my account.