| Age Hardening | (english) Hardening by aging, usually after rapid cooling or cold working. The term as applied to soft, or low carbon steels, relates to a wide variety of commercially important, slow, gradual changes that take place in properties of steels after the final treatment. These changes, which bring about a condition of increased hardness, elastic limit, and tensile strength with a consequent loss in ductility, occur during the period in which the steel is at normal temperatures. |
| Black Oil Tempered Spring Steel Strip (Scaleless Blue) | (english) A flat cold rolled usually .70/.80 medium high carbon steel strip, blue-black in color, which has been quenched in oil and drawn to desired hardness. While it looks and acts much like blue tempered spring steel and carries a Rockwell hardness of C44/47, it has not been polished and is lower in carbon content. Used for less exacting requirements than clock spring steel, such as snaps, lock springs, hold down springs, trap springs, etc. It will take a more severe bend before fracture than will clock spring, but it does not have the same degree of spring-back. |
| Blister Steel | (english) High-carbon steel produced by carburizing wrought iron. The bar, originally smooth, is covered with small blisters when removed from the cementation (carburizing) furnace. |
| high carbon steel | (โลหะ) เหล็กแข็งมากเป็นเหล็กที่มรธาตุคารบอนมากกว่า 0.50 เปอรเซนต์ เหมาะที่จะนำมาทำเครื่องมือมีคมต่าง ๆ |
| low carbon steel | (โลหะ) จำพวกเหล็กหล้าที่มีธาตุคารบอนน้อยกว่า 0.30 เปอรเซนต์ |
| medium carbon steel | (โลหะ) เหล็กกล้าปานกลาง เป็นเหล็กที่มีธาตุคารบอนอยู่ในระหว่าง 0.30 กับ 0.70 เปอรเซนต์ |