SAE 8620 Steel Supplier in India
SAE 8620 Round Bars, Billets, Flats & Ingots
What is SAE 8620 Steel?
SAE 8620 is a low-carbon nickel-chromium-molybdenum alloy steel primarily used for case hardening (carburizing) applications. It develops a hard, wear-resistant surface while maintaining a tough, ductile core, making it one of the world's most widely used grades for gears, shafts, pinions and transmission components.
Because of its excellent machinability, forgeability and heat treatment response, SAE 8620 material is extensively used in the automotive, agricultural, mining, heavy engineering and power transmission industries.
SAE 8620 Chemical Composition
| Element | Percentage (%) |
|---|---|
| Carbon (C) | 0.18 – 0.23 |
| Manganese (Mn) | 0.70 – 0.90 |
| Silicon (Si) | 0.15 – 0.35 |
| Nickel (Ni) | 0.40 – 0.70 |
| Chromium (Cr) | 0.40 – 0.60 |
| Molybdenum (Mo) | 0.15 – 0.25 |
| Phosphorus (P) | ≤ 0.035 |
| Sulphur (S) | ≤ 0.040 |
Typical Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength | 620–900 MPa |
| Yield Strength | 385–690 MPa |
| Hardness (Core) | 150–220 HB |
| Density | 7.85 g/cm³ |
| Elongation | 18–25% |
* Core properties before carburizing or depending on heat treatment. After carburizing, surface hardness reaches 58–62 HRC.
Key Properties of SAE 8620 Steel
Excellent Case Hardening
As an exceptional carburizing steel, it produces a very hard surface with outstanding wear resistance.
Tough Core Strength
Even after carburizing, the low-carbon core retains high toughness and impact resistance.
Good Machinability
Machines well before heat treatment, making it ideal for precision components.
Excellent Fatigue Resistance
Suitable for components subjected to repeated cyclic loading.
Good Forgeability
A premier forging steel widely used by manufacturers for automotive and industrial parts.
Dimensional Stability
Maintains dimensional accuracy after heat treatment when processed correctly.
SAE 8620 Heat Treatment
SAE 8620 is most commonly supplied in the annealed condition and heat treated after machining.
Normalizing & Annealing
Refines grain structure and improves machinability before manufacturing.
Carburizing
Carbon is diffused into the surface to produce a hard, wear-resistant outer layer.
Quenching
Typically oil quenched after carburizing to lock in surface hardness.
Tempering
Relieves stresses and optimizes the balance of hardness and toughness.
SAE 8620 for Forging Applications
SAE 8620 is one of the most commonly forged carburizing steels because it offers:
- Excellent forgeability
- Uniform case hardening
- Good machinability
- A tough core after heat treatment
- High wear resistance
It is widely used by automotive forging companies and OEM component manufacturers.
Common Applications
- • Transmission gears
- • Differential gears
- • Pinion and Ring gears
- • Camshafts & Counter shafts
- • Splined shafts & Drive shafts
- • Bushings and Rollers
- • Bearings
- • Forged automotive components
- • Heavy engineering parts
SAE 8620 Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| AISI / SAE / ASTM | 8620 |
| DIN | 20NiCrMo2-2 |
| EN | 20NiCrMo2-2 |
| JIS | SNCM220 |
Note: International equivalents can vary slightly in chemistry and mechanical property requirements.
SAE 8620 vs EN353
| Property | SAE 8620 | EN353 |
|---|---|---|
| Carbon | Low | Low |
| Nickel & Cr | Yes | Yes |
| Molybdenum | Yes | Minimal/None |
| Carburizing | Excellent | Excellent |
| Toughness | Excellent | Excellent |
Both are used for carburized gears; selection depends on customer specifications.
SAE 8620 vs EN19
SAE 8620 is a low-carbon steel designed for case-hardening (carburizing) where surface wear resistance and core toughness are needed. EN19 is a medium-carbon steel designed for through-hardening to achieve high strength throughout the entire cross-section.
Available Forms at Excellent Steels & Alloys
SAE 8620 Billets
- Automotive forgings
- Gear manufacturing
- Heavy engineering forgings
- Closed die forgings
SAE 8620 Ingots
- Forging units
- Rolling mills
- Steel processors
- Re-melting applications
SAE 8620 Round Bars
- Gear blanks
- Shafts & Pinions
- Automotive components
- Precision-machined parts
SAE 8620 Flats
- Engineering components
- Industrial machinery
- Fabrication
- Tooling applications
Frequently Asked Questions
What is SAE 8620 steel used for?
SAE 8620 is mainly used for carburized components such as gears, pinions, shafts, camshafts, rollers and transmission parts requiring a hard surface with a tough core.
Is SAE 8620 a case-hardening steel?
Yes. SAE 8620 is specifically developed for carburizing and is one of the most popular case hardening alloy steels worldwide.
Can SAE 8620 be forged?
Yes. SAE 8620 has excellent forgeability and is extensively used in closed-die and open-die forging operations.
What forms of SAE 8620 are available?
Excellent Steels & Alloys supplies SAE 8620 in Billets, Ingots, Round Bars, and Flats.
Excellent Steels & Alloys is a trusted supplier of SAE 8620 alloy steel for forging, gear manufacturing and precision engineering applications. We supply SAE 8620 billets, SAE 8620 ingots, SAE 8620 round bars and SAE 8620 flats to forging units, machine shops and engineering manufacturers across the country.
Why Buy SAE 8620 from Us?
- Consistent material quality
- Competitive pricing
- Fast dispatch across India
- Billets, ingots, round bars and flats
- Reliable supply for forging units and gear manufacturers
- Support for custom size and quantity requirements
Industries Served
- • Automotive Manufacturing
- • Commercial Vehicle Industry
- • Agricultural Equipment
- • Mining Machinery
- • Heavy Engineering
- • Construction Equipment
- • Power Transmission
- • Industrial Gear Manufacturing
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Contact us today for pricing, stock availability, and customized requirements for SAE 8620 Steel.