Qbh Steel Structure Fabricated House Workshop Platform Heavy Structural Roofing Frame Part Walkway & Floor Bridge Hexagonal Hex Nut Construction Materials

High Strength Black Oxide ASTM A194 2h Hex Heavy Structural Nuts   STYLEANSI ASME ASTM Heavy Hex NutsHex Heavy Structural Nuts STANDARDASTM A194 2HSUPPLIERQBHSHOPqbfastener.en.made-in-china.comSIZE1/2"~4"CLASS(Carbon steel)2,2H,2HM,4,7,7MCoating(Carbon steel)black, zinc, HDG, Heat treatment, Dacromet, GEOMET , CustomizedMATERIALCarbon steelPACKINGbulk/ boxes in cartons, bulk in polybags/ buckets, etc.PALLETsolid wood pallet, plywood pallet, ton box/bag, etc.Product DescriptionChoose these nuts for their good corrosion resistance and adherence to Strict-military Standardsfor material and construction.   ASTM A194-2HMA194-2HA194-4A194-7A194-7M Heavy Hex Nuts with Carbon and Alloy SteelTeflon Black/Zinc/H.D.G 1/2~4inch. QBH company will according Standard Specification for Carbon and Alloy Steel Nuts for Bolts forHigh Pressure or High Temperature Service, or Both.This standard is issued under the fixed designation A194/A194M; the number immediately followingthe designation indicates the year of original adoption or, in the case of revision, the year of lastrevision. A number in parentheses indicates the year of last reapproval.A superscript epsilon indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.  QBH HEAVY HEX NUTS    UNIT:MMSIZEFHCKG/MPCS1/412.4--12.75.54--6.3514.12--14.665.225/1613.87--14.277.11--7.9815.8--16.517.83/816.99--17.478.66--9.5819.38--20.1714.257/1618.49--19.0510.24--11.221.08--2218.881/221.59--22.2311.79--12.824.61--25.65309/1623.09--23.8313.36--14.4326.34--27.51375/826.19--26.9714.91--16.0329.84--31.17543/430.78--31.7518.03--19.2535.1--36.65887/8--935.41--36.5321.16--22.4840.36--42.161351--840.01--41.2824.28--25.745.61--47.651931-1/8-746.02-44.628.93-27.453.16-51.492691-1/4-750.8-49.2231.77-30.1458.64-56.833481-3/8-655.57-53.8235-33.2764.16-62.144631-1/2-660.32-58.4238.22-36.3969.64-67.465951-5/8-565.07-63.0141.45-39.5275.15-72.757421-7/8-574.62-72.2347.9-45.7786.15-83.410901-3/4-569.85-67.6144.67-42.648.64-78.069262-4.579.37-76.8351.13-48.8991.64-88.7113572-1/4-4.588-86.0557.17-54.73102.64-99.3618792-1/2-498.42-95.2563.62-60.98113.63-109.9825552-3/4-4107.95-104.4470.07-67.23124.63-120.5933793-4117.47-113.6676.53-73.48135.63-131.244315  Process Flow Cold ForgingAnnealing treatment (if need) -> wiredrawing ->  clod forging ->  tapping -> make heat treatment (if need) ->  Finish ->  Packing Hot ForgingCutting material ->  hot forging ->  turning ->  tapping ->  make heat treatment(if need) ->  Finish -> Packing Product Grade A194-2 , A194-2HM , A194-2H , A194-4 , A194-7 , A194-7M , A194-7LA194 Grades2QBHASTM A194 Series Carbon Steel Heavy Hex Nuts2HQuenched & tempered carbon steel heavy hex nuts2HMQuenched & tempered carbon steel heavy hex nuts, 100% hardness tested4Quenched & tempered carbon-molybdenum heavy hex nuts (withdrawn in 2017)7Quenched & tempered alloy steel heavy hex nuts7MQuenched & tempered alloy steel heavy hex nuts, 100% hardness tested7LQuenched & tempered alloy steel heavy hex nuts, Charpy impact tested8Stainless AISI 304 heavy hex nuts8MStainless AISI 316 heavy hex nutsMore DetailsQBH Materials and Chemical Compstition 1045CHEMICAL COMPOSI %CSiMnPSCrNiCu0.450.230.580.0140.0060.0570.0080.016  42CRMOCHEMICAL COMPOSI %CSiMnPSCrNiCuMo0.420.270.920.0130.0041.010.030.040.2 QBH A194 Chemical PropertiesElement2, 2H, and 2HM47 and 7M (AISI 4140)8 (AISI 304)8M (AISI 316)Carbon0.40% min0.40 - 0.50%0.37 - 0.49%0.08% max0.08% maxManganese1.00% max0.70 - 0.90%0.65 - 1.10%2.00% max2.00% maxPhosphorus, max0.040%0.035%0.035%0.045%0.045%Sulfur, max0.050%0.040%0.040%0.030%0.030%Silicon0.40% max0.15 - 0.35%0.15 - 0.35%1.00% max1.00% maxChromium  0.75 - 1.20%18.0 - 20.0%16.0 - 18.0%Nickel   8.0 - 11.0%10.0 - 14.0%Molybdenum 0.20 - 0.30%0.15 - 0.25% 2.00 - 3.00%  QBH A194 Mechanical PropertiesSpecificationMaterialNominal Size, In.Tempering Temp. °FProof Load Stress, ksiHardness RockwellSee NoteMinMaxASTM A194 Grade 2Medium Carbon Steel1/4 - 401501593521,2,3ASTM A194 Grade 2HMedium Carbon Steel, Quenched and Tempered1/4 - 4850175C24C381,2ASTM A194 Grade 2HMMedium Carbon Steel, Quenched and Tempered1/4 - 411501501592371,2,3ASTM A194 Grade 4Medium Carbon Alloy Steel, Quenched and Tempered1/4 - 41100175C24C381,2Supplier/BrandQBHShophttps://qbfastener.en.made-in-china.com/ASTM A194 Grade 7Medium Carbon Alloy Steel, Quenched and Tempered1/4 - 41100175C24C381,2ASTM A194 Grade 7MMedium Carbon Alloy Steel, Quenched and Tempered1/4 - 411501501592371,2,3ASTM A194 Grade 8Stainless AISI 3041/4 - 4-801263004ASTM A194 Grade 8MStainless AISI 3161/4 - 4-801263004  NOTES:The markings shown for all grades of A194 nuts are for cold formed and hot forged nuts. When nutsare machined from bar stock, the nut must additionally be marked with the letter 'B'. The letters Hand M indicate heat treated nuts.Properties shown are those of coarse and 8-pitch thread heavy hex nuts.Hardness numbers are Brinell Hardness.Nuts that are c