Product Overview

Stellite 12 is a cobalt-based high-temperature wear and corrosion-resistant alloy produced by Qinchuan New Materials (Zhengzhou) Co., Ltd. The alloy complies with standards AMS 5894, AWS A5.13, and UNS R30112. It is a high-carbon, chromium tungsten-reinforced cobalt-based high-temperature wear-resistant alloy, belonging to the classic Stellite hard alloy system. With cobalt as the matrix, it features ultra-high wear and erosion resistance, excellent high-temperature red hardness, and superior resistance to sulfidation corrosion and thermal fatigue stability through alloying design with high chromium and tungsten, combined with a dispersed distribution of high-density hard carbide reinforcing phases.

Main Product Features

Excellent wear resistance and impact resistance, superior red hardness at high temperature

Stellite 12 is made with a proprietary high-carbon, high-chromium, high-tungsten metallurgical formula, achieving stable hardness of 48-52 HRC in both cast and surfacing states. The alloy boasts exceptional resistance to abrasive wear, adhesion wear, and high-speed airflow/medium erosion. It does not soften at high temperatures and has extremely low wear attenuation, with superior red hardness at high temperatures compared to conventional stainless steel, carbon steel, and general cobalt-based alloys.

2. Excellent high temperature corrosion resistance and anti-sulfuration erosion

High-chromium cobalt-based matrix can spontaneously form a dense, strong, self-healing composite oxidation protective layer in high-temperature flue gas, sulfur-containing media, and humid heat corrosion environments, featuring excellent comprehensive properties of high-temperature oxidation resistance, sulfur corrosion resistance, and thermal corrosion resistance.

3. High temperature structural stability, outstanding resistance to thermal fatigue

The high-temperature microstructure of the alloy is extremely stable, with no phase transformation, grain coarsening, or high-temperature embrittlement issues during long-term continuous service at high temperatures. It possesses excellent thermal shock and thermal fatigue resistance, suitable for cyclic conditions with frequent start-stop of equipment, alternating cold and hot temperatures, and sudden temperature changes.

4. Wide process adaptability and diverse forming methods

Stellite 12 has excellent process compatibility, compatible with various forming and surface hardening processes such as precision casting, plasma welding, laser cladding, and plasma spraying.

Product Detailed Parameters

Brand: Qinchuan New Materials
Origin: Zhengzhou
Function: High temperature wear and corrosion resistant
Part Material: Cobalt-based Alloys
Product Model: Stellite 12
Standard: AMS 5894, AWS A5.13, UNS R30112
Operating Temperature: ≤800℃
Short-term maximum耐受 temperature: Up to 850℃
Hardness: 48-52 HRC

Application Scope

Stellite 12 alloy is widely used in the fields of oil and petrochemical industry, thermal power environmental protection, industrial gas turbines, and high-end fluid control valves with wear-resistant seals.

Frequently Asked Questions (FAQ)

Q: How is the wear resistance of Stellite 12 alloy?

A: Stellite 12 alloy boasts extremely high wear resistance, with a wear life 3-8 times that of conventional wear-resistant materials.

Q: How is the corrosion resistance of Stellite 12 alloy?

A: Stellite 12 alloy exhibits excellent corrosion resistance in high-temperature flue gas, sulfur-containing media, and humid-heat corrosion environments.

Q: What is the applicable temperature range for Stellite 12 alloy?

A: Stellite 12 alloy has a safe operating temperature of ≤800°C, with a short-term maximum耐受 temperature of up to 850°C.