High Tensile Alloy Fasteners

We are engaged in offering a wide range of High Tensile Alloy Fasteners such as studs, hex head bolts, square hex head, foundation bolts, jack screws, jack bolts and hex heavy series nuts. These fasteners are manufactured utilizing alloy, stainless and carbon steel material of various grades as per the sizes and specifications according to ASTM A 193 GR. B7/L7/B7M/B8/B16 & ASTM A 194 GR. 2H/2HM/4/7. Furthermore, we have all the necessary gauges and tools available for maintaining the sizes and the quality of the material. We have a good capacity of producing goods for more than 80 mt per month.

ASTM A193 B7 (Cr-Mo AISI 4140, 4142, 4145)

This material is considered suitable for bolts to be used at temperature below 450ºC, with a minimum effect on its structural strength during application at a high temperature. The material has the following chemical composition and physical properties.

C	Mn	P	S	Si	Cr	Mo
0.37 ~ 0.49	0.65 ~ 1.10	Max 0.035	Max 0.04	0.15 ~ 0.35	0.75 ~ 1.20	0.115 ~ 0.25
Dia	Minimum Tempering Temperature	Tensile Strength min Ksi	Yield Strength min. 0.2% offset Ksi	Elongation in 2" min.%	Reduction of area min.%	Hardness Max.
2½" and under	1.100 (593ºC)	125 (860)	105(720)	16	50	Max. 35HRC
Over 2½" to 4"	1.100 (593ºC)	115 (795)	95(665)	16	50	Max. 35HRC
Over 4" to 7"	1.100 (593ºC)	100 (690)	75(515)	18	50	Max. 29HRC