H-12 Tungsten Bar

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General Information
Material		Material Properties			Maximum Working Temp.	Ultimate Tensile Range (ksi min)	Modulus of Elasticity	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)30.0 (G)11.0	45%	.500" to 2.250"
Bar Sizes (Diameter in Inches)
.500	.531	.562	.593	.625	.656	.687	.718	.750	.781
.812	.843	.875	.906	.937	.968	1.000	1.062	1.125	1.187
1.250	1.312	1.375	1.437	1.500	1.562	1.625	1.687	1.750	1.812
2.000	2.250

Comments
Material is produced in the “As Rolled" condition. Springs are manufactured via the Hot Wound procedure, quenched and tempered. Each spring is checked for Rockwell Hardness to insure the proper temper is achieved. Temper Hardness should range between 41 R^c (187,000 psi tensile) & 49 R^c (253,000 psi tensile). Exceeding 49 R^c could result in brittle properties, increasing the possibility of failure. Bar lengths, in general, range from 15’ to 19’.

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