ASTM A194 Explained: Nut Grades, Chemical Composition, and Mechanical Requirements

Daftar isi

ASTM A194 is a material specification specifically for nuts, and it is most commonly used together with ASTM A193 (bolts and studs) for high-temperature and/or high-pressure service.

ASTM A194 – Chemical Requirements

Carbon & Alloy Steel / Martensitic Stainless Steel Nuts

NilaiMaterial / TypePBBCM NPSYaKrTidakSayaOther / Notes
1Baja karbon—≤0,15≤1,00≤0,040≤0,050≤0,40————
2, 2HM, 2HBaja karbon—≤0,40≤1,00≤0,040≤0,050≤0,40————
3Carbon-Molybdenum—0.40–0.500.70–0.90≤0,035≤0,0400,15–0,35——0,20–0,30—
4Type 501—≤0,10≤1,00≤0,040≤0,030≤1,004.0–6.0—0.40–0.65—
6Type 410S410000.08–0.15≤1,00≤0,040≤0,030≤1,0011.5–13.5———
6FType 416S41600≤0,15≤1.25≤0.060≤0,15≤1,0012.0–14.0——Selenium 0.15 min
6FType 416SeS41623≤0,15≤1.25≤0.060≤0.060≤1,0012.0–14.0——Selenium 0.15 min
7, 7M4140 / 4142 / 4145—0.38–0.480.75–1.00≤0,035≤0,0400,15–0,350.80–1.10—0,15–0,25—
16Cr-Mo-V steel—0.36–0.470.45–0.70≤0,035≤0,0400,15–0,350.80–1.15—0.50–0.65V 0.25–0.35, Al ≤0.015

Austenitic Stainless Steel Nuts

NilaiMaterial / TypePBBCM NPSYaKrTidakSayaTi / Nb / N / Other
8, 8AType 304S30400≤0,08≤ 2,00≤0,045≤0,030≤1,0018,0–20,08.0–11.0——
8C, 8CAType 347S34700≤0,08≤ 2,00≤0,045≤0,030≤1,0017.0–19.09.0–12.0—Nb+Ta ≥10×C, ≤1.10
8CLN, 8CLNAType 347LNS347510.005–0.020≤ 2,00≤0,045≤0,030≤1,0017.0–19.09.0–13.0—N 0.06–0.10
8M, 8MAType 316S31600≤0,08≤ 2,00≤0,045≤0,030≤1,0016.0–18.010.0–14.02.0–3.0—
8T, 8TAType 321S32100≤0,08≤ 2,00≤0,045≤0,030≤1,0017.0–19.09.0–12.0—Ti ≥5×(C+N), ≤0.70
8F, 8FAType 303S30300≤0,15≤ 2,00≤0,20≤0,15≤1,0017.0–19.08.0–10.0—Selenium 0.15 min
8P, 8PAType 305S30500≤0,12≤ 2,00≤0,045≤0,030≤1,0017.0–19.011.0–13.0——
8N, 8NAType 304NS30451≤0,08≤ 2,00≤0,045≤0,030≤1,0018,0–20,08.0–11.0—N 0.10–0.16
8LN, 8LNAType 304LS30453≤0,030≤ 2,00≤0,045≤0,030≤1,0018,0–20,08.0–11.0—N 0.10–0.16
8MN, 8MNAType 316NS31651≤0,08≤ 2,00≤0,045≤0,030≤1,0016.0–18.010.0–13.02.0–3.0N 0.10–0.16
8MLN, 8MLNAType 316LNS31653≤0,030≤ 2,00≤0,045≤0,030≤1,0016.0–18.010.0–13.02.0–3.0N 0.10–0.16
8R, 8RAXM-19S20910≤0.064.0–6.0≤0,045≤0,030≤1,0020.5–23.511.5–13.51,5–3,0N 0.20–0.40, Nb+Ta 0.10–0.30
8S, 8SAS21800S21800≤0,107.0–9.0≤0.060≤0,0303.5–4.516.0–18.08.0–9.0—N 0.08–0.18
8MLCuN / 8MLCuNA254 SMOS31254≤0,020≤1,00≤0,030≤0,010≤0.8019.5–20.517.5–18.56.0–6.5N 0.18–0.22, Cu 0.50–1.00
8MLCuN—S31730≤0,030≤ 2,00≤0,040≤0,010≤1,0017.0–19.015.0–16.53.0–4.0N 0.045, Cu 4.0–5.0
9C, 9CANomor 8367Nomor 8367≤0,030≤ 2,00≤0,040≤0,030≤1,0020.0–22.023.5–25.56.0–7.0N 0.18–0.25, Cu 0.75

Related Rescource

https://www.wermac.org/bolts/a193-b7_a320lL7_studs.html

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