S136 Plastic Mold Steel | AISI 420 ESR | 1.2083 | M310 tool steel
S136 steel is a chromium nickel molybdenum vanadium alloy steel. Plastic mold steel with excellent production characteristics has corrosion resistance, optical rotation, wear resistance, machinability, and excellent stability during quenching. it have better corrosion resistance than P20 steel.
Through external refining (VD) and electroslag remelting refining (ESR), the microstructure becomes purer and finer, with excellent corrosion resistance, polishing properties, wear resistance, and machinability. It also exhibits excellent dimensional stability during quenching.
1. Material characteristics of S136 Steel
S136 is a chromium nickel molybdenum vanadium alloy steel, mainly composed of chromium (Cr) 13.6%, carbon (C) 0.38%, silicon (Si) 0.90%, manganese (Mn) 0.5%, vanadium (V) 0.30%, and small amounts of nickel (Ni) and sulfur (S) elements. The reasonable ratio of these elements gives it high strength and hardness (HRC52), as well as good corrosion resistance.
2. S136 steel Corrosion resistance performance
The high chromium content of S136 is the key to its corrosion resistance. Chromium forms a dense oxide film on the surface of the material, effectively isolating corrosive media (such as acidic solutions or humid environments) from contact with the substrate. Experimental data shows that in the salt spray test, the corrosion resistance time of S136 is 5-8 times that of ordinary carbon steel.
3. S136 Polishing and wear resistance
S136 has excellent mirror polishing performance and is suitable for high polishing intensity and high demand internal modules. Its pure material, combined with the polishing performance of chromium, makes it excellent in mold manufacturing.
4. Application Fields of S136
S136 is widely used in precision injection molds, die-casting molds, and stamping molds. For example, in the automotive industry, injection molds are commonly used to manufacture plastic parts such as instrument panels and bumpers; In the electronics industry, it is used to manufacture high-precision plastic molds such as mobile phone cases and circuit board brackets.
5. Comparison with traditional mold steel
Compared to traditional mold steels such as ASTM P20 and H13, S136 has significant advantages in performance. For example, under the same processing conditions, the surface smoothness (Ra ≤ 0.2 μ m) of S136 is 20%~30% higher than that of P20, and its corrosion resistance is 1.5~2 times that of H13.
6. Processing performance and heat treatment
S136 has good machining performance and is suitable for various machining methods such as turning, milling, and grinding. Its hardenability is high, and through appropriate heat treatment processes such as quenching and tempering, its strength and toughness can be further improved.
7. Practical application cases
A certain automotive parts manufacturer replaced traditional mold steel with S136 when producing precision plastic parts. The results show that under the same production conditions, the mold life manufactured by S136 is 2-3 times that of traditional mold steel, and the forming accuracy is higher.
In summary, S136 is a high-performance mold steel widely used in mold manufacturing fields that require high corrosion resistance, high polishing performance, and high precision.