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What is red-shortness in steel?
is the steel which breaks as it's heated to red hot
How do you control hot shortness?
The main reason of hot sortness is sulphur in steel. Therefore, answer of control of hot sortness is to control the sulphur in liquid steel before casting
What is hot shortness?
Sulfur in steel is considered injurious except when added to enhance machinability. Sulfur readilly combines with iron to form a low melting iron sulphide. Sulfur causes hot shortness in steel unless sufficient manganese is added. Sulfur has a greater affinity for manganese than iron and forms manganese sulphide which has a meltin point above the hot rolling temperature of steel, which eliminates hot shortness. By hot shortness we mean that the steel will literally break apart during hot rolling resulting in a scrapped product
What is ST 37 hot rolled or cold rolled steel?
(t)rolled
What is the difference between Cold rolled steel and hot rolled steel?
Hot-rolled sheet has low hardness, easy processing, good ductility and cheaper price. Cold rolled sheet has high hardness, relatively difficult to process, but not easy to deformation, higher strength. If you want to buy cold-rolled steel, you can go to the official website of Changzheng, the price of Changzheng's steel is moderate, and it is the choice of the public. Buy cold-rolled steel plate recognized Changzeng.
What is red-shortness in steel?
is the steel which breaks as it's heated to red hot
How do you control hot shortness?
The main reason of hot sortness is sulphur in steel. Therefore, answer of control of hot sortness is to control the sulphur in liquid steel before casting
Which has higher density cold steel or hot steel?
When steel gets hot, it gets slightly larger due to thermal expansion. Since the mass stays the same, and density = mass/volume, it gets (very, very slightly) less dense. So cold steel is more dense than hot steel.
What must be done to hot-rolled steel in the mill before it can be cold finished?
Hot rolled steel must be descaled by pickling in acid with a lime water rinsebefore it can be cold finished
In metallurgy what is hot shortness in steel?
The term is used for character of steel, which become brittle at hot working temperature ie above 0.6 Tm (recrystallization temperature, where strain hardening is removed ) hot short hinders in hot working operation, often caused by the presence of sulphur in metal.
Were Apollo astronauts hot or cold on the moon?
The astronauts had carefully controlled temperatures in their suits. On the sunny side it was hot, on the shady side cold.
What is hot shortness?
Sulfur in steel is considered injurious except when added to enhance machinability. Sulfur readilly combines with iron to form a low melting iron sulphide. Sulfur causes hot shortness in steel unless sufficient manganese is added. Sulfur has a greater affinity for manganese than iron and forms manganese sulphide which has a meltin point above the hot rolling temperature of steel, which eliminates hot shortness. By hot shortness we mean that the steel will literally break apart during hot rolling resulting in a scrapped product
What happens to metal when exposed to hot and cold?
Steel gets stronger
What is ST 37 hot rolled or cold rolled steel?
(t)rolled
How is steel coated with black oxide like on gun barrels to protect them from rust?
It is a form of controlled rust. In hot bluing, the steel parts are placed in a hot chemical bath that changes the outer layer of steel to black iron oxide. This helps protect the steel beneath it from further rusting. In rust bluing, the steel is exposed to moist air, and allowed to rust under controlled conditions.
What is the difference between Cold rolled steel and hot rolled steel?
Hot-rolled sheet has low hardness, easy processing, good ductility and cheaper price. Cold rolled sheet has high hardness, relatively difficult to process, but not easy to deformation, higher strength. If you want to buy cold-rolled steel, you can go to the official website of Changzheng, the price of Changzheng's steel is moderate, and it is the choice of the public. Buy cold-rolled steel plate recognized Changzeng.
Is there a way to tell the difference between cold steel and hot rolled steel If so how can you tell?
Why does Hot Rolled Steel have a rough, blue-grey finish, while Cold Finished Steel has a smooth grey finish? Hot Rolled Steels are just that - They are heated up red-hot and pushed through rollers that squeeze the metal, literally squishing it into a particular profile, depending on the shape of the rollers. The process takes a long time, and because the steel is so hot for so long in the open air of the steel mill, the surface of the metal has has a long time to oxidize, producing a thick, tough oxide scale with the characteristic blue grey finish of the final product. Cold Finished Steels are just that - the final rolling is done when the steel is cold (room temperature), the whole operation bathed in oil, so the finished product is unoxidized, the grey of the actual steel, and as smooth as the rollers that do the processing. that was taken from metalrefrence.com
