ASTM A194 Grade 8 Stainless Steel Bolts

• Material: Stainless Steel
• Type: Hexagon Head
• Connection: Hinged Bolts
• Head Style: Hexagonal
• Standard: DIN, ANSI, GB, JIS, BSW, GOST
• Grade: B7, B8, B8m
• Model NO.: KM-20201125
• Finish: Polishing
• Certificate: ISO, CE
• Thread: Unc
• Thread Type: Full, Half
• Transport Package: in Sea Worthy Export Packing
• Specification: 1/2" to 4"
• Trademark: Kingmetal
• Origin: China
• HS Code: 7616100000
• Production Capacity: 1000 Tons Per Month

Product Description

 

ASTM A194 Grade 8 stainless steel bolts

The ASTM A194 specification covers carbon, alloy, and stainless steel nuts intended for use in high-pressure and/or high-temperature service. Unless otherwise specified, the American National Standard Heavy Hex Series (ANSI B 18.2.2) shall be used. Nuts up to and including 1-inch nominal size shall be UNC Series Class 2B fit. Nuts over 1-inch nominal size shall be either UNC Series Class 2B fit or 8 UN Series Class 2B fit. High strength ASTM A194 grade 2H nuts are common in the marketplace and are often substituted for ASTM A563 grade DH nuts due to the limited availability of DH nuts in certain diameters and finishes.

A194 Grades

2	Carbon steel heavy hex nuts
2H	Quenched & tempered carbon steel heavy hex nuts
2HM	Quenched & tempered carbon steel heavy hex nuts, 100% hardness tested
4	Quenched & tempered carbon-molybdenum heavy hex nuts (withdrawn in 2017)
7	Quenched & tempered alloy steel heavy hex nuts
7M	Quenched & tempered alloy steel heavy hex nuts, 100% hardness tested
7L	Quenched & tempered alloy steel heavy hex nuts, Charpy impact tested
8	Stainless AISI 304 heavy hex nuts
8M	Stainless AISI 316 heavy hex nuts

Specification	Material	Nominal Size (In.)	Minimum Tempering Temperature °F	Proof Load Stress (ksi)	Hardness Rockwell		Nut Type		Black Oxide Zinc Plated Nickel Plated Phosphated HDG Dacromet Cadmium Plated PTFE
					Min	Max
ASTM A194 Grade 2H	Medium Carbon Steel, Quenched and Tempered	1/2 to 4	850	175	C24	C35	Heavy hex nut Hex thin nut Hex nut
ASTM A194 Grade 2HM	Medium Carbon Steel, Quenched and Tempered	1/2 to 4	1150	150	159	235
ASTM A194 Grade 4	Medium Carbon Alloy Steel, Quenched and Tempered	1/2 to 4	1100	175	C24	C35
ASTM A194 Grade 7	Medium Carbon Alloy Steel, Quenched and Tempered	1/2 to 4	1100	175	C24	C35
ASTM A194 Grade 7M	Medium Carbon Alloy Steel, Quenched and Tempered	1/2 to 4	1150	150	159	235

A194 Chemical Properties

Element	2, 2H, and 2HM	4	7 and 7M (AISI 4140)	8 (AISI 304)	8M (AISI 316)
Carbon	0.40% min	0.40 - 0.50%	0.37 - 0.49%	0.08% max	0.08% max
Manganese	1.00% max	0.70 - 0.90%	0.65 - 1.10%	2.00% max	2.00% max
Phosphorus, max	0.040%	0.035%	0.035%	0.045%	0.045%
Sulfur, max	0.050%	0.040%	0.040%	0.030%	0.030%
Silicon	0.40% max	0.15 - 0.35%	0.15 - 0.35%	1.00% max	1.00% max
Chromium			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%