Overview

This catalog details the FM Alloy brand's specialty steels, highlighting advanced production technologies, stringent quality assurance, and tailored material properties designed to meet diverse industrial requirements.

1. Production Technologies and Quality Assurance

• Advanced Steel Production: Utilizes proprietary refining techniques such as vacuum induction melting and ESR furnaces to ensure clean, high-quality steel.
• Integrated Manufacturing: Combines machining, heat treatment, and coating to produce near-net shape products.
• Flexible Production System: Supports a wide variety of products, variable volumes, and short lead times.
• Certified Quality: Quality systems comply with ISO standards and have received TPM awards and the Deming Prize.

2. Steel Categories and Specifications

The catalog is divided into six main sections:

1. High-grade Special Steels
2. High-carbon Chromium Bearing Steels
3. Martensitic Stainless Steel
4. High-performance Alloys
5. Hardness Chart
6. Production Size Ranges

High-grade Special Steels: Includes alloy and high-speed tool steels with detailed chemical compositions (C, W, Mo, Cr, V, Co) and performance ratings for wear resistance, hot hardness, toughness, and grindability. Both conventional and powder metallurgy methods are used.

High-carbon Chromium Bearing Steels: Grades like SUJ2 and SUJ3 with chemical and heat treatment details, offering high wear resistance and dimensional stability for bearings, gauges, and rolls.

Martensitic Stainless Steel: Grades such as 440C provide high corrosion and wear resistance, suitable for blades and bearings.

High-performance Alloys: Proprietary DURO, PROVA, and EXEO series steels designed for precision dies, plastic molds, and functional components requiring low thermal expansion and heat resistance.

3. Heat Treatment and Hardness

• Detailed heat treatment parameters include austenitizing temperatures (1000°C to 1300°C) and tempering temperatures (500°C to 620°C).
• Quenching methods include oil, gas, and hot bath cooling, followed by multiple tempering cycles.
• Hardness ranges from 40 HRC to 72 HRC depending on steel grade and treatment; vacuum furnace use may reduce hardness by ~2 HRC.

4. Performance Rankings and Applications

Steels are ranked on wear resistance and toughness to guide selection. Typical applications include cutting tools, molds, punches, rolling tools, bearings, and high-temperature components.

5. Key Data from Charts and Tables

• Chemical compositions specify key alloying elements for each grade.
• Performance ratings (scale 1-10) for wear resistance, hot hardness, toughness, and grindability assist material selection.
• Hardness charts correlate tempering temperatures with achievable hardness.
• Production size ranges define dimensional capabilities across product forms.

6. Production Size Ranges and Product Forms

Dimensions and size ranges are provided for coils, round bars, rods, sheets, plates, square bars, flat bars, and precision rolled wires. Lengths typically range from 1000 mm to 5000 mm, with diameters and thicknesses varying by product type and processing method (cold drawn, ground, hot rolled, forged).

• Cold drawn round bars: 1.3 mm to 12.0 mm diameter
• Cold rolled sheets: 0.5 mm to 12.0 mm thickness, 500 mm to 2200 mm width
• Hot rolled bars: 13 mm to 120 mm diameter, 3000 to 5000 mm length

7. Surface Conditions, Straightness, and Tolerances

• Diameter tolerances range from ±0.012 mm (small precision bars) to ±0.10 mm (larger unground bars).
• Straightness tolerances are tighter for shorter lengths (e.g., ≤0.020 mm for 20-50 mm lengths) and scale proportionally for longer bars.
• Surface defect depth tolerances are less than 0.005 mm for ground bars and up to 0.15 mm for unground bars.

8. Related Standards and Steel Grade Equivalents

References to JIS and AISI standards are provided, with equivalences such as SKH9 to M2 and SUS440C to 440C stainless steel. Additional grades and hardness levels are available on request, with some size limitations (e.g., 440C available only ground in 2-10 mm diameters).

9. Best Practices and Recommendations

• Select steel grades balancing wear resistance and toughness according to application needs.
• Adhere strictly to recommended heat treatment protocols to achieve optimal hardness and mechanical properties.
• Utilize FM Alloy steels for enhanced performance due to refined microstructures and controlled compositions.

10. Contact and Manufacturing Information

Comprehensive contact details for sales and manufacturing offices worldwide are provided, covering Asia, Oceania, America, Europe, Middle East, and India.

• Shanghai, China: Multiple companies share the Yitong Industry Zone address with telephone and fax contacts.
• Korea: Daesung-Nachi Hydraulics Co., Ltd. with full contact details.
• India: Nachi Motherson Tool Technology Ltd. and Nachi Motherson Precision Ltd. with addresses and contact numbers.

Critical Information Summary

• Precise heat treatment parameters and quenching methods are essential for achieving target hardness.
• Hardness varies by grade and treatment; vacuum furnace use may reduce hardness slightly.
• Wide production size ranges accommodate diverse product forms and applications.
• Strict dimensional, straightness, and surface defect tolerances ensure product quality.
• International steel grade equivalences facilitate global material selection.
• Global contact network supports customer service and manufacturing operations.