7/8" slim hole spray metal sucker rod coupling
1). Material: seamless alloy steel 40cr (aisi 5140)
2). Standard: api spec 11b
3). Main specification:
Od:1 5/8" (41.3mm)
Id: 1 3/16"(30.16mm)
Length: 4" (101.6mm)
Weight: 0.52kg
4). Smoothness: 3.1íß10-3
5). Coat thickness(in): 0.01in ~ 0.02in
6). Basic hardness: hrc 16-23
7). Surface hardness: hrc 55-62
8). Intergrate intension(mpa): 484
9). Hole rate: ú+2%
10). Min. Hardness of the layer: 595hv0.2
11). Min. Tensile strength: 655 mpa
12). Operating temperature: -1000íµ~400íµ
13). Life: > 180 days
Wooden case
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