JIS G3429 Seamless tubes
JIS G3429 standard specifies the seamless steel tubes, hereinafter referred to as the tube used for the manufacture of seamless steel gas cylinders specified in JIS B8230 and JIS B8241.
Seamless steel tubes for high pressure gas cylinder .
Size (mm):
- Outer Dimensions: 19.05mm ~ 114.3mm
- Wall Thickness:2.0mm ~ 14 mm
- Length: max 16000mm
Application: Seamless steel tubes for high pressure gas cylinder.
The main products of steel / steel grade:
- JIS G3429 STH11
- JIS G3429 STH12
- JIS G3429 STH21
- JIS G3429 STH22
Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers’ requirements .
Painting: as requested.
Chemical Compositions(%)
| Grade | C | Si | Mn | P | S | Ni | Cr | Mo |
| STH11 | ≤0.50 | 0.10-0.35 | ≤1.80 | ≤0.035 | ≤0.035 | / | / | / |
| STH12 | 0.30-0.41 | 0.10-0.35 | 1.35-1.70 | ≤0.030 | ≤0.030 | / | / | / |
| STH21 | 0.25-0.35 | 0.15-0.35 | 0.40-0.90 | ≤0.030 | ≤0.030 | ≤0.25 | 0.80-1.20 | 0.15-0.30 |
| STH22 | 0.33-0.38 | 0.15-0.35 | 0.40-0.90 | ≤0.030 | ≤0.030 | ≤0.25 | 0.80-1.20 | 0.15-0.30 |
