ASTM A194 Specifications

Technical Menu Posted on July 1st, 2015 by vapro

The ASTM A194 specification covers a variety of carbon, alloy, and martensitic stainless steel nuts in the size range 1⁄4 through 4 in. and metric M6 through M100 nominal. ASTM A194 also covers austenitic stainless steel nuts in the size range 1⁄4 in. and M6 nominal and above. These nuts are intended for high-pressure or high-temperature service, or both. Grade substitutions without the purchaser’s permission are not allowed. The material may be further processed by centerless grinding or by cold drawing.

Grade
 2  Carbon steel hvy hex nut
 2H  Quenched & tempered carbon steel hvy hex nut
 2HM        Quenched & tempered carbon steel hvy hex nut
 4  Quenched & tempered carbon-molybdenum hvy hex nut
 7  Quenched & tempered alloy steel hvy hex nut
 7M  Quenched & tempered alloy steel hvy hex nut
 8  Stainless AISI 304 hvy hex nut
 8M  Stainless AISI 316 hvy hex nut

Chemical Requirements

Grade Carbon Manganese Phosphorous, max Sulfur, max Silicon Chromium Nickel Molybdenum Other Elements
2, 2H and 2 HM 0.40% min. 1.00% max. 0.04% 0.05% 0.40% max
3 0.10% min. 1.00% max. 0.04% 0.03% 1.00% 4.0-6.0% 0.20-0.30%
4 0.40 -0.50% 0.70-0.90% 0.035% 0.04% 0.15-0.35% 0.20-0.30%
6 0.15% 1.00% 0.04% 0.03% 1.00% 11.5-13.5%
6F 0.15% 1.25% 0.06% 0.06% 1.00% 12.0-14.0% Selenium-0.15% min
7 and 7M (AISI 4140) 0.37-0.49% 0.65-1.10% 0.04% 0.04% 0.15-0.035% 0.75-1.20% 0.15-0.25%
8 (AISI 304) 0.08% 2.00% max 0.05% 0.03% 1.00% max 18.0-20.0% 8.0-11.0%
8M (AISI 316) 0.08% 2.00% max 0.05% 0.30% 1.00% max 16.0-18.0% 10.0-14.0% 2.00-3.00%
8C 0.08% 2.00% 0.045% 0.03% 1.00% 17.0-19.0% 9.0-12.0% Columbium and Tantalum – 10x carbon content, min
8T 0.80% 2.00% 0.045% 0.30% 1.00% 17.0-19.0% 9.0-12.0% Titanium-0.70%max, Nitrogen-0.10%
8F 0.15% 2.00% 0.20% 0.15%min 1.00% 17.0-19.0% 8.0-10.0%
8R 0.06% 4.0-6.0% 0.045% 0.03% 1.00% 20.5-23.5% 11.5-13.5% 1.50-3.00% Columbium and Tantalum-0.10-0.30%, Nirogen-0.20-0.40%, Vanadium-0.10-0.30%
8S 0.10% 7.0-9.0% 0.060% 0.03% 3.5-4.5% 16.0-18.0% 8.0-9.0% Nitrogen-0.08-0.18%
16 0.36-0.47% 0.45-0.70% 0.035% 0.40% 0.15-0.35% 0.80-1.15% 0.50-0.65% Vanadium-0.25-0.35%, Aluminum-0.015%

Identification Markings

Identification Marking Specification Materials
2
ATL ROD
ASTM A194 Grade 2 Medium Carbon Steel
2H
ATL ROD
ASTM A194 Grade 2H Medium Carbon Steel, Quenched and Tempered
2HM
ATL ROD
ASTM A194 Grade 2HM Medium Carbon Steel, Quenched and Tempered
3
ATL ROD
ASTM A194 Grade 3 501 Stainless Steel
4
ATL ROD
ASTM A194 Grade 4 Medium Carbon Alloy Steel, Quenchedand Tempered
6
ATL ROD
ASTM A194 Grade 6 410 Stainless Steel, Quenched and Tempered
6F
ATL ROD
ASTM A194 Grade 6F 416 Stainless Steel, Quenched and Tempered
7
ATL ROD
ASTM A194 Grade 7 Medium Carbon Alloy Steel, Quenchedand Tempered
7M
ATL ROD
ASTM A194 Grade 7M Medium Carbon Alloy Steel, Quenchedand Tempered
8
ATL ROD
ASTM A194 Grade 8 304 Stainless Steel
8M
ATL ROD
ASTM A194 Grade 8M 316 Stainless Steel
8C
ATL ROD
ASTM A194 Grade 8C 347 Stainless Steel
8T
ATL ROD
ASTM A194 Grade 8T 321 Stainless Steel
8F
ATL ROD
ASTM A194 Grade 8F 303 Stainless Steel
8R
ATL ROD
ASTM A194 Grade 8R XM19 – S20910 Nitronic 50
8S
ATL ROD
ASTM A194 Grade 8S S21800 Nitronic 60
16
ATL ROD
ASTM A194 Grade 16 Chromium MolybdenumVanadium

Related: ASTM A194 Specifications at ASTM.org

Copyright ©
All-Pro Threaded ProductsA Division of All-Pro Fasteners
Website Design by Visual App

All-Pro Threaded

All-Pro Threaded

Products

Technical

projects-menu