PACIFIC Chrome Plated Bar is typically used for hydraulic cylinder rods. It is stocked in two basic conditions; CPO® (Chrome Plated Only) and IHCP® (Induction Hardened and Chrome Plated). The primary difference is that IHCP® bars are induction hardened to give a hard case on the surface for support to the chrome plating; this minimizes surface damage to the chrome from abrasion and/or impact.
Also, AISI 1045/50 CPO® and IHCP® are both available in standard and high strength properties. Thickness of chrome plating is designated as either Standard (0.0005" min.) or Heavy (0.001" min.).
CPO® bars are also stocked in Acralloy® and Stressproof® grades. Acralloy® offers the strength and toughness of a quenched and tempered alloy steel; Stressproof® gives high strength with free machining characteristics.
Types and grades of PACIFIC Chrome Plated Bar are listed below:
| Grade | Standard Chrome Plated Only S-CPO® | Heavy Chrome Plated Only H-CPO® | Induction Hardened & Chrome Plated IHCP® | High Strength-SCPO® S-CPO® HS | High Strength-IHCP® IHCP® HS |
|---|---|---|---|---|---|
AISI 1045/50 |
* |
* |
* |
* |
* |
Stressproof® |
* |
||||
Acralloy® |
* |
Stressproof is a registered trademark of Niagara-LaSalle
CHEMICAL COMPOSITION: Heat Analysis - ranges and limits %
| Grade | C | Mn | P | S | Cr | Mo |
|---|---|---|---|---|---|---|
| AISI 1045/50 | .43/.55 |
.60/.90 |
.040 max |
.050 max |
- |
- |
| Stressproof® | .40/.48 |
1.35/1.65 |
.040 max |
.24/.33 |
- |
- |
| Acralloy® | .38/.45 |
.75/1.00 |
.035 max |
.040 max |
.80/1.00 |
.15/.25 |
TYPICAL PROPERTIES: Approximate - not for specification
| Grade | Tensile (psi) | Yield (psi) | Elongation | Hardness | Machinability |
|---|---|---|---|---|---|
| AISI 1045/50* | 90,000 |
75,000 |
10% |
179 HB |
56% |
| AISI 1045/50 HS** | 115,000 |
100,000 |
9% |
235 HB |
56% |
| Stressproof®** | 115,000 |
100,000 |
8% |
241 HB |
83% |
| Acralloy® | 120,000 |
100,000 |
20% |
255 HB |
55% |
* Cold drawn properties apply through 4-1/2" diameter; larger diameters have hot rolled properties, i.e., 50,000 psi approximate yield strength.
** ASTM A311, Class B
CHROME PLATING PROPERTIES: CPO® and IHCP®
| Thickness | Hardness | Surface Finish | |
|---|---|---|---|
| Standard | .0005" min |
69 HRC min |
16 RMS max |
| Heavy | .001" min |
69 HRC min |
16 RMS max |
INDUCTION HARDENED PROPERTIES: IHCP®
| Surface Hardness | Effective Case Depth (to 50 HRC) |
|---|---|
50 HRC min |
.050" min |
Shapes and Conditions Available:
 | 1045/50 S-CPO® through 5" Diameter
| 1045/50 HS S-CPO® from 2-1/2" through 4-1/2" Diameter
| 1045/50 H-SCP® through 4-1/2" Diameter
| 1045/50 IHCP® 5" and 5-1/2" Diameters
| 1045/50 HS IHCP® through 4-1/2" Diameter
| Acralloy® H-CPO® through 2-1/2" Diameter
| Stressproof® S-CPO® through 2" Diameter
| |
