ASME SA-372 includes three types of carbon steel and six types of alloy steel. This specification covers thin-walled seamless steel pipe used for boilers and and pressure vessels. Grade C is equivalent to 37Mn, and Grade E is equivalent to 30CrMo. Both latter materials belongs to GB/T18248.
Specifications
| Standard | ASME SA-372 |
| Steel Grade/Material | Grade A,Grade B,Grade C,Grade D,Grade E,Grade F,Grade G,Grade H,Grade J,Grade K.Grade L,Grade M |
| Outer Diameter(OD) | 1.5”-28”(38mm-720mm) |
| Wall Thickness(WT) | 0.102”-2.362”(2.6mm-60mm) |
| Length | 5.8-16m or OEM |
| Packing | Plastic cap or bundling |
| Section Shape | Round |
| Technique | Seamless hot rolled |
| Application | Used for boilers and and pressure vessels |
| Place of Origin | China |
| MOQ | 25 ton |
| Transportation | 1.Sea port:Tianjin Xingang port,Qingdao port,Shanghai Luojing port →America,Europe,Africa,Middle East,India, Pakistan,Japan,Korea, Australia…(shipping) 2.Land port:Alataw pass port(Пограничный пункт “Алашанькоу”) |
| Chemical Composition(%) | |||||||||
| Grade | C | Si | Mn | P | S | Cr | Mo | V | Ni |
| Grade A | ≤0.30 | 0.15-0.35 | ≤1.0 | ≤0.025 | ≤0.025 | — | — | — | — |
| Grade B | ≤1.0 | 0.15-0.35 | ≤1.35 | ≤0.025 | ≤0.025 | — | — | — | — |
| Grade C | ≤0.48 | 0.15-0.35 | ≤1.65 | ≤0.025 | ≤0.025 | — | — | — | — |
| Grade D | 0.40-0.50 | 0.15-0.35 | 1.40-1.80 | ≤0.025 | ≤0.025 | — | 0.17-0.27 | — | — |
| Grade E (Classes 55,65,70) | 0.25-0.35 | 0.15-0.35 | 0.40-0.90 | ≤0.025 | ≤0.025 | 0.80-1.15 | 0.15-0.25 | — | — |
| Grade F (Classes 55,65,70) | 0.30-0.40 | 0.15-0.35 | 0.70-1.00 | ≤0.025 | ≤0.025 | 0.80-1.15 | 0.15-0.25 | — | — |
| Grade G (Classes 55,65,70) | 0.25-0.35 | 0.15-0.35 | 0.70-1.00 | ≤0.025 | ≤0.025 | 0.40-0.65 | 0.15-0.25 | — | — |
| Grade H (Classes 55,65,70) | 0.30-0.40 | 0.15-0.35 | 0.75-1.05 | ≤0.025 | ≤0.025 | 0.40-0.65 | 0.15-0.25 | — | — |
| Grade J (Classes 55,65,70,110) | 0.35-0.50 | 0.15-0.35 | 0.75-1.05 | ≤0.025 | ≤0.025 | 0.80-1.15 | 0.15-0.25 | — | — |
| Grade K | ≤0.18 | 0.15-0.35 | 0.10-0.40 | ≤0.025 | ≤0.025 | 1.00-1.80 | 0.20-0.60 | — | 2.0-3.3 |
| Grade L | 0.38-0.43 | 0.15-0.35 | 0.60-0.80 | ≤0.025 | ≤0.025 | 0.70-0.90 | 0.20-0.30 | — | 1.65-2.00 |
| Grade M
(Classes 85 and 100) |
≤0.23 | ≤0.3 | 0.20-0.40 | ≤0.020 | ≤0.020 | 1.50-2.00 | 0.40-0.60 | ≤0.08 | 2.8-3.9 |
| Mechanical Properties | ||||
| Grade | Tensile Strength,
ksi (MPa) |
Yield Strength
(0.2% Offset), Ksi (MPa),min |
Elongation in 2 in. (50mm) min(%) |
Hardness,
HB,min |
| Grade A | 60-85(415-585) | 35(240) | 20 | 121 |
| Grade B | 75-100(515-690) | 45 | 18 | 156 |
| Grade C | 90-115(620-795) | 55(380) | 15 | 187 |
| Grade D | 1005-130(725-895) | 65(450) | 15 | 217 |
| Grade E,F,G,H,J (Class 55) | 85-110(545-760) | 55(380) | 20 | 179 |
| Grade
E,F,G,H,J (Class 65) |
105-130(725-895) | 65(450） | 19 | 217 |
| Grade E,F,G,H,J (Class 70) | 120-145(825-1000) | 70(485) | 18 | 248 |
| Grade J(Class 110) | 135-160(930-1100) | 110(760) | 15 | 277 |
| Grade K | 100-125(690-860) | 80(550) | 20 | 207 |
| Grade L | 155-180(1070-1240) | 135(930) | 12 | 311 |
| Grade M (Class 85) | 105-130(725-895) | 85(585) | 18 | 217 |
| Grade M (Class 100) | 120-145(825-1000) | 100(690) | 16 | 248 |
