Engineering Structural Steel include alloy structural and carbon steel. as AISI 4140 steel, 4130, 4340, 4135, 1020/s20c,1045/s45c steel, Etc.
ASTM A29/A29M, DIN 17200, JIS G4105, GB/T 3077 Alloy Structural Steel Standard
AISI/SAE 4140 Strength, high hardenability, good toughness, quenching deformation is small, high temperature creep strength and long-term strength.widely used in Big gear, supercharger drive gear, rear axle, the load of connecting rod and a spring clip and Oil deep well pipe joints and salvage tools, Etc.
SAE 4340 Steel | 1.6581 | 36CrNiMo4 | SNCM439 | 40CrNiMo alloy engineering structural steel
ASTM A29/A29M, DIN 17200, JIS G4103, GB/T 3077 Alloy Structural Steel Standard
aisi/sae 4340 is a high strength alloy structural steel material grade. It has high strength, toughness and excellent hardenability and anti-overheating stability, but the white point of high sensitivity, temper brittleness. Weldability is poor, high temperature preheating required before welding, after welding to eliminate stress, the use of quenched and tempered.
SAE 4130 Steel | 1.7218 | SCM420 | 25CrMo4 | 708A25 Alloy Structural Steel Material
ASTM A29/A29M, DIN 17200, JIS G4105, GB/T 3077 Alloy Structural Steel Standard
4130 structural steel with high strength and toughness, high hardenability, quenching in the oil critical diameter of 15 ~ 70mm; steel thermal strength is better, at 500 ℃ below the sufficient high temperature strength, but 550 ℃ The strength of a significant decline; when the alloy elements in the lower limit of welding is quite good, but close to the upper limit of welding medium, and to be preheated to more than 175 ℃ before welding;
SAE 4135 Steel | 1.7220 | 35CrMo4 | SCM435 | 708A37
ASTM A29/A29M, DIN 17200, JIS G4105, GB/T 3077 Alloy Structural Steel Standard
ASTM SAE 4135 Steel has a high static strength, impact toughness and high fatigue limit, hardenability than GB 40Cr high, high temperature creep strength and long-term strength, long-term working temperature up to 500 ℃; cold deformation plasticity Medium, poor weldability.
30MnCrTi4 Alloy Structral Steel | 1.8401 | 20CrMnTi Steel
DIN 17200, GB/T 3077 Alloy Structural Steel Standard
30MnCrTi4 engineering structural steel is a good performance of the carburized steel, hardenability higher, hardened by carburizing hardened and tough after the surface of the heart, with a high low-temperature impact toughness, weldability medium, after normalizing have good machinability.
SAE 8620 Steel | 1.6523 | SNCM220 | 805M20 | 20CrNiMo | 2506
ASTM A28/A29M, DIN 17200, JIS G4103, BS 970-1, GB/T 3077,SS14 Alloy Structural Steel Standard
SAE 8620 Steel is a Carburized structural steel, hardenability is very good. Suitable for processing gearing, bearing.