Key Features
- Direct analog dial reading
- Designed for Superficial Rockwell hardness testing
- Engineered to provide sensitive and accurate readings
- Intended for testing thin and soft materials
- Conforms to ASTM E18
- Dead-weight test-force application
- Manual test-force control
- Suitable for laboratories, workshops, tool rooms and inspection laboratories
- Lifetime technical support from Phase II
Overview
The Phase II 900-345 is an analog Superficial Rockwell hardness tester designed for testing thin and soft materials using Superficial Rockwell hardness scales. Its rugged design is engineered to produce highly sensitive and accurate readings while providing repeatable testing across the supported Superficial Rockwell scales.
The tester uses a direct-reading analog dial, a dead-weight test-force application system and manual test-force control. It follows ASTM E18 guidelines and is suitable for heat-treat facilities, tool rooms, workshops, laboratories and inspection laboratories. Phase II includes lifetime technical support with its hardness testers.
Supported Hardness Scales
Diamond Indenter Scales
| Scale |
Indenter |
Preliminary Force |
Total Force |
| 15N |
Spheroconical diamond |
29.42 N / 3 kgf |
147.1 N / 15 kgf |
| 30N |
Spheroconical diamond |
29.42 N / 3 kgf |
294.2 N / 30 kgf |
| 45N |
Spheroconical diamond |
29.42 N / 3 kgf |
441.3 N / 45 kgf |
Phase II describes the N scales as similar to the Rockwell A, C and D scales, but for thinner-gage material.
1/16-Inch Carbide Ball Scales
| Scale |
Indenter |
Preliminary Force |
Total Force |
| 15T |
1/16-inch carbide ball |
29.42 N / 3 kgf |
147.1 N / 15 kgf |
| 30T |
1/16-inch carbide ball |
29.42 N / 3 kgf |
294.2 N / 30 kgf |
| 45T |
1/16-inch carbide ball |
29.42 N / 3 kgf |
441.3 N / 45 kgf |
Phase II describes the T scales as similar to the Rockwell B, F and G scales, but for thinner-gage material.
Additional Superficial Rockwell Scales
| Scale |
Indenter |
Preliminary Force |
Total Force |
| 15W |
1/8-inch carbide ball |
29.42 N / 3 kgf |
147.1 N / 15 kgf |
| 30W |
1/8-inch carbide ball |
29.42 N / 3 kgf |
294.2 N / 30 kgf |
| 45W |
1/8-inch carbide ball |
29.42 N / 3 kgf |
441.3 N / 45 kgf |
| 15X |
1/4-inch carbide ball |
29.42 N / 3 kgf |
147.1 N / 15 kgf |
| 30X |
1/4-inch carbide ball |
29.42 N / 3 kgf |
294.2 N / 30 kgf |
| 45X |
1/4-inch carbide ball |
29.42 N / 3 kgf |
441.3 N / 45 kgf |
| 15Y |
1/2-inch carbide ball |
29.42 N / 3 kgf |
147.1 N / 15 kgf |
| 30Y |
1/2-inch carbide ball |
29.42 N / 3 kgf |
294.2 N / 30 kgf |
Phase II identifies the W scales for very soft material. Its published chart lists only the 15Y and 30Y scales; it does not list a 45Y scale on this product page.
Included Accessories
- N-scale diamond indenter
- 1/16-inch ball indenter
- Three HRN test blocks
- One HRT test block
- 5.87-inch (150 mm) test table
- 2.5-inch (63 mm) flat anvil
- Standard Vee anvil
- Accessory case
- Dust cover
Optional Accessories
- NIST/ASTM-certified hardness test blocks, penetrators and kits are available from Phase II.
