A Wide Range of SLD Materials and Plating Options ...

Spring-loaded device material grades and descriptions as well as finish plating's are summarized in the tables and notations shown below:

Material	Description	Key*
Stainless Steel	Good in corrosive environments food processing and high temperature applications (spring can withstand 600°F) Grades: 440C***, 300 Series per ASTM A-484 or ASTM A-582, 17-PH	B,P,L,S
Carbon Steel	Less expensive material than stainless steel and better wear resistance of the plunger tip due to case hardening.** Grades: 11L17 or 12L14A or Ledloy AX	B,P
Music Wire	Used on most carbon steel products.	S
Nylon or Delrin®	Will not mar soft material such as aluminum or brass.	B,P,L
Phenolic	Will not mar soft material such as aluminum or brass. More brittle than nylon or Delrin.	B,P

Delrin®is a registered trademark of DuPont Corp. * (B) Body • (P) Plunger • (L) Ball • (S) Spring **NOTE: All steel plungers are typically case hardened to 0.15-.010 inches in depth to a hardness of between RC 58-62.

Finish Platings

• Zinc plate; yellow, clear or black chromate to conversion coat
• Black oxide
• Passivate; SAE-AMS-QQ-P-35, ASTM-A-967***
• Other special coatings
  
  

Body Alloy Material Specifications
Material Grade	Tensile PSI	Yield PSI	Elong.*	Hardness**
440C	110,000	65,000	14	Br230
302,304,304L	65,000	35,000	80	Br150
303S	100,000	60,000	40	Br228
316,316L	80,000	35,000	55	Br149
321,347	85,000	35,000	55	Br150
12L14	80,000	60,000	10	Rc B85
LEDLOY AX	80,000	60,000	10	Rc B85
11L17	80,000	60,000<	10	Rc B85

* Elongation 2°, % ** Br = Brinell, Rc = Rockwell *** Stainless steel components are passivated prior to assembly

Spring Material Specifications
Material Grade	Max Temp°F	Max Temp°C	Hardness*
Music Wire	250	121	Rc C41-60
17-7PH	650	343	Rc C38-57

Plastic Material Specifications
Material Description	Service Temperature°F	Tensile(1)	Ln. Exp.(2)	Hardness*
Delrin**	195	9,000	5.0	Rc M80-90
Nylon	180	12,000	4.5	Rc R120
Phenolic	284	20,000	-	Rm 110

(1) Yield Strength, PSI (2) Linear Thermal Expansion IN/IN F°10(-5) * Rc = Rockwell, Br = Brinell ** Acetal (Celcon, Delrin