1. The ordinary structural steel in the Japanese steel (JIS series) grades is firstly composed of three sectors: the sector implies the amount of material, such as: S (Steel) implies steel, F (Ferrum) implies iron; the second sector implies different shapes and varieties Uses, such as P (Plate) to suggest a plate, T (Tube) to suggest a tube, K (Kogu) to suggest something; the third sector implies a characteristic number, which is generally low tensile strength.
2. SPHC-The first S is the abbreviation of Steel Steel, P is the abbreviation of Plate, H is the abbreviation of Hot Heat, C is the abbreviation of Commercial Commercial, which generally implies that hot-rolled steel plates and strips are generally used. The reason for the folding is that due to the pursuit of high efficiency by counterfeiters, the reduction amount is too large, and ears are generated. When the next rolling is performed, folding occurs. The folded product will crack after bending, and the strength of the steel is greatly reduced.
3. SPHD-implied hot-rolled steel plates and strips for stamping.
4. SPHE-implies hot-rolled steel plates and strips for deep drawing.
5. SPCC-suggest that cold-rolled carbon steel sheets and strips are generally used. Here the third letter C is an abbreviation for Cold. When it is necessary to guarantee the tensile test, add T to the end of the grade for SPCCT. The bottom support of raw material costs has temporarily lost its ability to pull down on steel prices.
6. SPCD-It is suggested that cold-rolled carbon steel sheet and steel strip for stamping are equivalent to China's 08AL (13237) excellent carbon structural steel.
7, SPCE-implies cold-rolled carbon steel sheet and steel strip for deep drawing, which is equivalent to China 08AL (5213) deep drawing steel. To ensure non-timeliness, add N to the end of the grade for SPCEN.
Cold rolled carbon steel sheet and strip adjustment code: Annealed form is A, scale adjustment is S, 1/8 hard is 8, 1/4 hard is 4, 1/2 hard is 2, and hard is 1.
Appearance processing code: Wudicheng finish rolling is D, bright finish rolling is B. For example, SPCC-SD implies the use of cold-rolled carbon sheets for scale adjustment and general rolling in Wucheng City. Another example is SPCCT-SB, which implies that scale adjustment and bright processing require cold-rolled carbon sheets that guarantee the performance of machinery and equipment.
8. The method of suggesting the steel brand for JIS machine equipment structure is: S + carbon content + letter code (C, CK), where the carbon content is implied by the middle value × 100, the letter C: implied carbon K: implied carburizing steel . For example, the carbon junction sheet S20C has a carbon content of 0.18-0.23%.
