Alloy Steels
Alloy Steels offers premium products like 34CrNiMo6/1.6582, known for toughness; 42CrMo4/4140/1.7225QT, a tempered medium carbon alloy; 4340, recognized for consistent hardness; and 8620/21NiCrMo2/1.6523, celebrated for its hardness and toughness. Each material meets strict industrial standards.
34CrNiMo6 steel/1.6582 steel
Material Classification
Heat-treatable low alloy steel
Primary Applications
Extensive engineering applications
Post-Treatment Tensile Strength
1000 -1200 N/mm² post heat-treatment
Core Material Properties
Good ductility, impact resistance, hardenability, and wear performance, with notable low-temperature impact properties.
Chemical Composition
| C | Mn | Si | Ni | Cr | Mu |
| 0.30-0.38% | 0.50-0.80% | 0.10-0.40% | 1.30-1.70% | 0.90-1.20% | 0.15-0.30% |
Product Information
| Process | Hot rolled/forged | |
| Size | 16-1200 mm | |
| Length | Rods 6/9/12 meter, any length, customized fixed-length, multiple length | |
| Surface Condition | Black surface, Rough turned, Peeling, Grinding | |
| Heat Treatment | Normalized, Annealed, Quenching and Tempered, FP, SR | |
| Delivery Time | Within 7 days | |
| UT | SEP1921-84 D/d, EN10028-3 or ASTM A388 | |
| Stock | ≥1300 mt |
Heat Treatment
1 +A: Annealed (full/soft/spheroidizing)
2 +N: Normalized
3 +NT: Normalized and tempered
4 +QT: Quenched and tempered (water/oil)
Applications
34CrNiMo6/1.6582 Alloy Steels is a heat treatable, low alloy steel,used for a wide range of engineering parts. It is capable of being heat treated to produce a typical tensile strength of 1000 -1200 N/mm² which combined with good ductility and resistance to shock. It also has good hardenability,enabling it to be used for medium tensile strengths in fairly large sections, and attain good wear resistance,good impact property at low temperatures.
42CrMo4 steel/4140 steel/1.7225QT steel
Material Classification
European standard alloy steel, mainly quenched and tempered
Primary Applications
Large plastic molds, gears, axles, rods, spring clamps, oil drill joints.
Post-Treatment Tensile Strength
1000 -1200 N/mm² post heat-treatmentHigh strength, toughness, and fatigue limit.
Core Material Properties
Minimal temper brittleness, good shock resistance, and low-temp impact toughness.
Chemical Composition
| C | Si | Mn | P | S | Cr | MU |
| 0.38-0.45% | 0.15-0.35% | 0.60-0.90% | 0.025% | 0.035% | 0.90-1.20% | 0.15-0.30% |
Product Information
| Process | Hot rolled/forged | |
| Size | 16-1200 mm | |
| Length | Rods 6/9/12 meter, any length, customized fixed-length, multiple length | |
| Surface Condition | Black surface, Rough turned, Peeling, Grinding | |
| Heat Treatment | Normalized, Annealed, Quenching and Tempered, FP, SR | |
| Delivery Time | Within 7 days | |
| UT | SEP1921-84 D/d, EN10028-3 or ASTM A388 | |
| Stock | ≥8000 mt | |
| Size | 6mm-16mm | |
Alloy Steels Heat Treatment
1 +A: Annealed (full/soft/spheroidizing)
2 +N: Normalized
3 +NT: Normalized and tempered
4 +QT: Quenched and tempered (water/oil)
Applications
42CrMo4/4140/1.7225 alloy steels has high strength, high toughness, good hardenability, temper brittleness, high fatigue limit, good impact resistance after quenching and tempering, and good low temperature impact toughness. This steel is suitable for the manufacture of large and medium-sized plastic molds requiring a certain degree of strength and toughness, transmission gears, rear axles, load-carrying connecting rods, spring clips and oil deep well drill pipe joints.
4340 steel
Material Classification
Medium-carbon nickel-chromium-molybdenum alloy.
Primary Applications
High-strength parts due to tensile strength and toughness.
Forging Range
2250 to 1800 º F (1230 to 980 º C); slow cool post-forging.
Core Material Properties
High wear and corrosion resistance; good ductility when annealed.
Chemical Composition
| C | Si | Mn | P | S | Cr | Ni | Mu |
| ≤0.08% | ≤1.00% | ≤2.00% | ≤0.045% | ≤0.030% | 16.0-18.0% | 10.0-14.0% | 2.0-3.0% |
AISI 4340 Alloy SteelS Standard and Relevant Steel Specifications
| ASTM | USA | German | Japan | |
| 4340 | 36CrNiMo4/1.6511 | EN24/817M40 | SNCM0439/SNCM8 |
Alloy Steels Heat Treatment
1 +A: Annealed (full/soft/spheroidizing)
2 +N: Normalized
3 +NT: Normalized and tempered
4 +QT: Quenched and tempered (water/oil)
Applications
Steel 4340 is a medium-carbon nickel-chromium-molybdenum steel alloy with excellent tensile strength, toughness, and fatigue resistance. The material is typically supplied in an annealed condition, and additional heat treatments such as oil quenching and tempering or normalizing and tempering can be employed to produce parts with even higher strength and fatigue resistance.
Furthermore, Steel 4340 exhibits impressive wear resistance, particularly in terms of abrasion resistance, shock and impact resistance, and outstanding atmospheric corrosion resistance. The alloy also possesses good ductility, especially when in the annealed condition, making it easily formable and machinable
8620 steel/21NiCrMo2 steel/1.6523 steel
Material Classification
Low-alloy carburizing material.
Primary Applications
Differentials, drives, engines, equipment starters, gears, steering mechanisms, and transmission components for cars.
Carburizing Response
Excellent; good hardenability for various section sizes.
Core Material Properties
Cost-effective, superior machinability, and widely available.
Chemical Composition
| C | Mn | Si | Ni | Cr | Mu |
| 0.18-0.23% | 0.70-0.90% | 0.15-0.35% | 0.40-0.70% | 0.40-0.60% | 0.15-0.25% |
Product Information
| Process | Hot rolled/forged | |
| Size | 16-1200 mm | |
| Length | Rods 6/9/12 meter, any length, customized fixed-length, multiple length | |
| Surface Condition | Black surface, Rough turned, Peeling, Grinding | |
| Heat Treatment | Normalized, Annealed, Quenching and Tempered, FP, SR | |
| Delivery Time | Within 7 days | |
| UT | SEP1921-84 D/d, EN10028-3 or ASTM A388 | |
| Stock | ≥2000 mt | |
| Size | 6mm-16mm | |
| As customers’ required, we also provide cold drawn material |
Alloy Steels Heat Treatment
1 +A: Annealed (full/soft/spheroidizing)
2 +N: Normalized
3 +NT: Normalized and tempered
4 +QT: Quenched and tempered (water/oil)
Applications
AISI SAE 8620 alloy steels is a commonly used low-alloy material for carburizing, with excellent carburizing response, good hardenability for most section sizes, it has many extensive applications due to its low cost, better machinability, and availability.
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