Suhm Spring Works - Materials Properties

 

Material

Material Properties

Maximum Working Temp,

 Ultimate Tensile Range,
MPa

Modulus of Elasticity,
MPa

Approx, Design % of Ultimate Tensile (torsional)

Common Sizes,
mm

H-12 Tungsten Bar

ASTM A681

(Chem, only)

UNS T20812

 Good for high temperature applications.

371°C

1289

(E) 206,8k
(G) 75,8k

45% 

12,70 to 57,15

 

SIZE CHART

Bar Diameter, mm
12,70 19,05 25,40 38,10

13,49

19,84

26,97

39,67

14,27

20,62

28,58

41,28

15,06

21,41

30,15

42,85

15,88

22,23

31,75

44,45

16,66

23,01

33,32

46,02

17,45

23,80

34,93

50,80

18,24

24,59

36,50

 57,15

 

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 HRC 41 and HRC 49.  Bar lengths range from 4,57 m to 5,79 m.


HRC 41  =  1289 MPa tensile
HRC 49  =  1744 MPa 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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