Alloy 718 Specimens

Product form

HT Condition

Heat treatment detail

1 × S1

RB

ST Standard

1035˚C–2 h AC to RT

1 × S2

RB

STA Standard (Oilfield Spec. API 6A718)

1035˚C–2 h AC/788˚C–7 h AC to RT

1 × S3

RB

ST Non-Standard

1250˚C–2 h WQ

2 × S4

RB

STA Non-Standard

1250˚C–2 h WQ/788˚C–16 and 25 h WQ to RT

1 × S5

RB

STA Standard

1035˚C–1 h AC, then 718˚C–8 h, then FC at 0.433˚C/min–0.933˚C/min to 621˚C, and then hold for 8 h, AC to RT

4 × S6

Bolt (Φ 22 mm)

Standard (Oilfield Spec. API 6A718)

1035˚C–2 h AC/788˚C–7 h AC to RT

4 × S7

Bolt (Φ 28 mm)

As-Received from subsea (Oilfield Spec. API 6A718)

1035˚C–2 h AC/788˚C–7 h AC to RT