Suhm Spring Works - Materials Properties

 

Material

Material Properties

Maximum Working Temp.

 Ultimate Tensile Range (ksi min)

Modulus of Elasticity, psi 106

Approx. Design % of Ultimate Tensile (torsional)

Common Sizes (inches)

H-12 Tungsten Bar

ASTM A681

(Chem. only)

UNS T20812

 Good for high temperature applications.

700°F

187 

(E) 30
(G) 11.0

45% 

.500" to 2.250"

 

SIZE CHART

Bar Diameter, inches

  

Bar Diameter, inches

  

Bar Diameter, inches

  

Bar Diameter, inches
.500 .750 1.00 1.500

.531

.781

1.062

1.562

.562

.812

1.125

1.625

.593

.843

1.187

1.687

.625

.875

1.250

1.750

.656

.906

1.312

1.812

.687

.937

1.375

2.000

.718

.968

1.437

 2.250

 

COMMENTS:

Material is produced in the “As Rolled” condition. Springs produced from wire size diameters

are "Cold Wound" and Tempered.  Springs produced from bar size diameters are "Hot Wound", 

quenched, and tempered.  Each Hot Wound spring is hardness checked to insure proper

hardness.  Tempered hardness should range between 41Rc and 49Rc .  Bar lengths

range from 15’ to 19’.

 

 41Rc /   =    187,000  psi tensile

49Rc /   =    253,000  psi tensile

  

These data are provided as a reference guide only and are not intended for design purposes.  Strength values and sizes are subject to change.  Please check with a Suhm Spring representative for confirmation. 

 

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