Standard:
GB 18248--------- China National Standard
JIS G3429-------- Japanese Industrial Standards
Purpose:
For the manufacture of pressure vessels, gas cylinders seamless.
The main production steel grades:
37Mn、34Mn2V、30CrMo、35CrMo、STH11、STH12、STH21、STH22等。
Mechanical properties:
|
Standard |
Grade |
Tensile strength (MPa) |
Yield strength (MPa) |
Elongation (%) |
|
GB18248 |
37Mn |
≥750 |
≥630 |
≥16 |
|
34Mn2V |
≥745 |
≥530 |
≥16 |
|
|
30CrMo |
≥930 |
≥785 |
≥12 |
|
|
35CrMo |
≥980 |
≥835 |
≥12 |
Chemical composition：
|
Standard |
model |
Chemical Composition |
||||||||
|
C |
Si |
Mn |
P、S |
Cu |
Ni |
Mo |
Cr |
V |
||
|
GB18248 |
37Mn |
0.34~0.40 |
0.10~0.30 |
1.35~1.65 |
≤0.030 |
≤0.20 |
≤0.30 |
/ |
≤0.30 |
/ |
|
34Mn2V |
0.30~0.37 |
0.17~0.37 |
1.40~1.75 |
≤0.030 |
≤0.20 |
≤0.30 |
/ |
≤0.30 |
0.07~0.12 |
|
|
30CrMo |
0.26~0.34 |
0.17~0.37 |
0.40~0.70 |
≤0.030 |
≤0.20 |
≤0.30 |
0.15~0.25 |
0.80~1.10 |
/ |
|
|
35CrMo |
0.32~0.40 |
0.17~0.37 |
0.40~0.70 |
≤0.030 |
≤0.20 |
≤0.30 |
0.15~0.25 |
0.80~1.10 |
/ |
|
|
JIS G3429 |
STH11 |
≤0.50 |
0.10~0.35 |
≤1.80 |
≤0.035 |
/ |
/ |
/ |
/ |
/ |
|
STH12 |
0.30~0.41 |
0.10~0.35 |
1.35~1.70 |
≤0.030 |
/ |
/ |
/ |
/ |
/ |
|
|
STH21 |
0.25~0.35 |
0.15~0.35 |
0.40~0.90 |
≤0.030 |
/ |
≤0.25 |
0.15~0.30 |
0.80~1.20 |
/ |
|
|
STH22 |
0.33~0.38 |
0.15~0.35 |
0.40~0.90 |
≤0.030 |
/ |
≤0.25 |
0.15~0.30 |
0.80~1.20 |
/ |
|
标准：
GB 18248---------中国国家标准
JIS G3429--------日本工业标准
用途：
适用于制造高压容器、气瓶用无缝钢管。
主要生产钢管牌号：
37Mn、34Mn2V、30CrMo、35CrMo、STH11、STH12、STH21、STH22等。
机械性能：
|
标 准
|
牌 号 |
抗拉强度(MPa) |
屈服强度(MPa) |
伸长率(%) |
|
GB 18248 |
37Mn |
≥750 |
≥630 |
≥16 |
|
34Mn2V |
≥745 |
≥530 |
≥16 |
|
|
30CrMo |
≥930 |
≥785 |
≥12 |
|
|
35CrMo |
≥980 |
≥835 |
≥12 |
化学成分：
|
标 准
|
牌 号 |
化 学 成 分 |
||||||||
|
C |
Si |
Mn |
P、S |
Cu |
Ni |
Mo |
Cr |
V |
||
|
GB18248 |
37Mn |
0.34～0.40 |
0.10～0.30 |
1.35～1.65 |
≤0.030 |
≤0.20 |
≤0.30 |
/ |
≤0.30 |
/ |
|
34Mn2V |
0.30～0.37 |
0.17～0.37 |
1.40～1.75 |
≤0.030 |
≤0.20 |
≤0.30 |
/ |
≤0.30 |
0.07～0.12 |
|
|
30CrMo |
0.26～0.34 |
0.17～0.37 |
0.40～0.70 |
≤0.030 |
≤0.20 |
≤0.30 |
0.15～0.25 |
0.80～1.10 |
/ |
|
|
35CrMo |
0.32～0.40 |
0.17～0.37 |
0.40～0.70 |
≤0.030 |
≤0.20 |
≤0.30 |
0.15～0.25 |
0.80～1.10 |
/ |
|
|
JIS G3429 |
STH11 |
≤0.50 |
0.10～0.35 |
≤1.80 |
≤0.035 |
/ |
/ |
/ |
/ |
/ |
|
STH12 |
0.30～0.41 |
0.10～0.35 |
1.35～1.70 |
≤0.030 |
/ |
/ |
/ |
/ |
/ |
|
|
STH21 |
0.25～0.35 |
0.15～0.35 |
0.40～0.90 |
≤0.030 |
/ |
≤0.25 |
0.15～0.30 |
0.80～1.20 |
/ |
|
|
STH22 |
0.33～0.38 |
0.15～0.35 |
0.40～0.90 |
≤0.030 |
/ |
≤0.25 |
0.15～0.30 |
0.80～1.20 |
/ |
|