Nichroloy is a clean, fine-grain, alloy steel produced by the electric furnace process and furnished rough-turned for applications requiring exceptionally high tensile strength and resistance to wear, shock and fatigue. Rigid quality control assures a steel of consistently high chemical and physical properties. For the TG&P version of Nichroloy, please see ACCURLOY.
Benefits of Nichroloy
Longer Service Life:
Engineered to develop higher strength, finer finish, cleaner chemistry and better fatigue resistance than standard grades of alloys and carbon steels such as SAE 1045, 4140, 4150, 4340, etc.
Precision Finish:
Turned, ground and polished to very close tolerances, Nichroloy will save you time and money in machining and down-time.
Availability:
Baldwin International maintains one of the largest stocks of precision finished shafting in the U.S. With a full array of sizes from 1/4″ dia. to 9″ dia. in common 1/16″ increments, as well as metric sizes, we can supply your specific shaft how you want it and when you want it.
Compare Nichroloy to 4140
| Factors | 4140 | Nichroloy | Advantages of Nichroloy |
|---|---|---|---|
| Manufacturing Process | Open Hearth Furnace. Large heats, little uniform control | Small Electric Furnace heats | Greater control, less defects, cleaner steel which increases toughness and service life |
| Tensile Strength (Heat Treated 28-32 RC) | 125,000 PSI | 155,000 PSI Typical (Higher on smaller diameters) | Approximately 25% higher strength |
| Yield Strength (Heat Treated 28-32 RC) | 100,000 PSI | 130,000 PSI Typical (Higher on smaller diameters) | Approximately 25% higher strength |
| Stress Relieved & Machine Straightened | Optional – must be specified | Stress relieved at mill | Minimizes Bowing and “Walking” during machining |
| Low Sulphur Vacuum Degassed | Not a commercial practice | Degassed at mill | Builds toughness by removing impurities in the steel |
| Fatigue Resistance | Low Toughness | High degree of toughness | Higher endurance limit. Will minimize fatigue caused by twisting and flexing in use. |
| Wear Resistance | Hard and soft spots, Uneven wear | Uniform hardness | Uniform hardness and less decarburization give increased wear life. Tends to work-harden with wear. |
| Machinability | Not consistent | Uniform | Uniform grain and hardness offer better machinability |
Common Applications for Nichroloy
Arbors
Armature Shafts
Axles
Bolts
Boring Bars
Chain Links
Chain Pins
Clevices
Conveyor Shafts and Rollers
Crank Shafts / Pins
Drag Line Parts
Drift Pins
Drill Shanks
Drive Shafts
Feed Screws
Fittings
Gears
Gear Shafts
Generator Shafts
Grinder Spindles
Gudgeons
High Pressure Valve Studs
Highly Stressed
Shafting
Hoist Hooks & Pins
Hoist Shafts
Hubs
Impeller Shafts
Jack Shafts
Journals
Lead Screws
Line Shafts
Machine Tool Pinions
Magneto Shafts
Mandrels
Mining Machine Parts
Motor Shafts
Nuts
Pinions
Pins
Piston Rods
Power Shovel Shafts
Propeller Shafts
Push Rods
Reamer Shafts
Renecking Spinning
Rollers
Rings
Screws
Set Screws
Shackles
Skidding Tools
Sleeves
Sleeve Shafts
Spindle
Spinning Rollers
Steam Shovel Parts
Steering Knuckles
Studs
Tie Rods
Thrust Shafts
Tongs
Transmission Screws
Valve Stems
Wearing Strips
Worms
Worm Gears
Wrist Pins
Nichroloy Size Range
| DIAMETER SIZE (INCHES) | ||
|---|---|---|
| 1/2 | 31/2 | 8 |
| 5/8 | 33/4 | 81/4 |
| 3/4 | 4 | 81/2 |
| 7/8 | 41/4 | 83/4 |
| 1 | 41/2 | 9 |
| 11/4 | 43/4 | 91/2 |
| 13/8 | 5 | 93/4 |
| 11/2 | 51/4 | 10 |
| 13/4 | 51/2 | 101/2 |
| 17/8 | 53/4 | 11 |
| 2 | 6 | 111/2 |
| 21/4 | 6 1/4 | 12 |
| 23/8 | 61/2 | 121/2 |
| 21/2 | 63/4 | 13 |
| 23/4 | 7 | 131/2 |
| 27/8 | 71/4 | 14 |
| 3 | 71/2 | 15 |
| 31/4 | 73/4 | 16 |
Nichrology comes in random and cut-to-length sizes up to 24 feet. Please inquire on your specific sizes.
Properties of Nichroloy
Typical As Delivered Mechanical Properties
| Hardness | Rockwell C 28 to 32 |
| Tensile Strength | 155,000 psi |
| Yield Strength | 130,000 psi |
| Reduction in Area | 50% |
| Elongation in 2″ | 20% |
| Grain Size | 95% of 8 on Shepherd fracturegrain size standards |
Heat Treatment
| Forging | 1900°F – 2100°F |
| Hardening | 1525°F – 1575°F (oil quench) |
| Annealing | 1425°F – 1500°F (212 BHN) |
| Normalizing | 1600°F – 1650°F |
| Tempering | (see chart) |
Temper immediately after removal from oil quench.
Tempering Chart
(based on 1/2″ dia. test specimen)
| DrawTemperature°F | Rockwell “C” | Tensile PSI | Yield PSI | Elongation in 2″% | Reduction in Area% |
|---|---|---|---|---|---|
| 400 | 54 | 312,000 | 274,000 | 12 | 35 |
| 500 | 52 | 296,000 | 262,000 | 12 | 37 |
| 600 | 50 | 273,000 | 240,000 | 12 | 38 |
| 800 | 47 | 256,000 | 234,000 | 12 | 42 |
| 1000 | 42 | 194,000 | 175,000 | 15 | 50 |
Locations offering this product:
Our Products
Chain
- Blacksmithing
- Blocks and Sheaves
- Chain
- Chain Slings
- Clamps, Plate-Beam
- Connecting Links
- Eye bolts
- Hoists, Hand and electric
- Hooks
- Load Binders
- Rings, Forged and Welded
- Roller Bearing Swivels
- Shackles
- Sheet and Plate Clamps
- Transport Chain and Accessories
- Turnbuckles
- Wire Rope and Fittings
- Wire Rope Lifting Slings and Fittings
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